Western Digital Server WDBLVH0120KBK User Manual
™
WD Sentinel RX4100  
Small Business Storage Server  
Administrator and Maintenance Guide  
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Contacting WD Technical Support  
When contacting WD for support, have your WD product serial number, system hardware, and  
system software versions available.  
United States & Canada  
Europe  
United States  
Canada  
855.556.5117  
855.556.5117  
Belgium  
Cyprus  
Czech Republic  
00 80021102110  
00 80021102110  
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Denmark  
009 80021102110  
00 80021102110  
990 80021102110  
999 80021102110  
Mexico & South America  
Argentina  
Brazil  
00 80021102110  
0021 80021102110  
Estonia  
Finland  
Columbia  
Grenada  
Panama  
Peru  
009 80021102110  
00 80021102110  
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France  
Germany  
Greece  
Hungary  
Iceland  
Ireland  
Israel  
Italy  
Luxembourg  
Netherlands, The  
00 80021102110  
00 80021102110  
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00 80021102110  
00 80021102110  
014 80021102110  
00 80021102110  
00 80021102110  
00 80021102110  
Uruguay  
Africa  
South Africa  
09 80021102110  
Asia Pacific  
Australia  
China  
Hong Kong  
Japan  
0011 800.2110.2110  
00 800.2110.2110  
001 800.2110.2110  
010 800.2110.2110  
00 800.2110.2110  
(Telekom Malaysia IDD)  
Norway  
Poland  
Portugal  
Sweden  
00 80021102110  
00 80021102110  
00 80021102110  
00 80021102110  
00 80021102110  
Malaysia  
Swiss Confederation, The  
New Zealand  
Philippines  
Singapore  
00 800.2110.2110  
00 800.2110.2110  
001 800.2110.2110  
(Singtel IDD)  
United Kingdom, The  
00 80021102110  
Taiwan  
00 800.2110.2110  
(Chunghwa IDD)  
Thailand  
001 800.2110.2110  
Registering Your WD Product  
Register your WD product to get the latest updates and special offers. You can easily register your  
product on the user interface of the product software or online at http://register.wd.com.  
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Table of Contents  
WD® Service and Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii  
WD Guardian Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii  
1
Important User Information . . . . . . . . . . . . . . . . . . . . 1  
Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1  
Handling Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2  
Recording Your WD Product Information . . . . . . . . . . . . . . . . . . . . .2  
About This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2  
2
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
Getting to Know Your WD Sentinel RX4100 Server . . . . . . . . . . . . .3  
Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3  
System Requirements and Compatibility Information . . . . . . . . . . . .7  
Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8  
Product Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9  
Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10  
Where to Find Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12  
3
Connecting the Server and Getting Started . . . . . . 13  
User Roles and Responsibilities . . . . . . . . . . . . . . . . . . . . . . . . . . .13  
How the WD Sentinel RX4100 Fits into Your Office . . . . . . . . . . . .15  
Connecting the WD Sentinel RX4100 Server to Your Network  
(Preferred Method) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15  
Connecting the WD Sentinel RX4100 Server from a Client  
Computer (Optional Method). . . . . . . . . . . . . . . . . . . . . . . . . . .16  
Setting up your WD Sentinel Server (one time only) . . . . . . . . . . . .17  
Connecting your Computers . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20  
Rebooting the WD Sentinel Server . . . . . . . . . . . . . . . . . . . . . . . . .26  
4
Managing the WD Sentinel Server (Dashboard) . . 28  
Setting up WD Sentinel Server & Connecting Computers. . . . . . . .28  
Accessing the Dashboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28  
Adding a User Account . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31  
Performing Dashboard Tasks. . . . . . . . . . . . . . . . . . . . . . . . . . . . .33  
Using the Home Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33  
Managing User Accounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34  
Managing Computers and Backups . . . . . . . . . . . . . . . . . . . . . . .35  
Managing Server Folders and Hard Drives . . . . . . . . . . . . . . . . . .35  
Monitoring Add-ins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35  
WD SENTINEL RX4100  
ADMINISTRATOR AND MAINTENANCE GUIDE  
TABLE OF CONTENTS – i  
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Monitoring System Health and Alerts . . . . . . . . . . . . . . . . . . . . . .35  
Updating Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39  
Managing Server Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43  
Shutting Down the Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45  
5
6
Managing Storage on the WD Sentinel Server. . . . 46  
WD Sentinel Server RAID Storage . . . . . . . . . . . . . . . . . . . . . . . . .46  
Using USB Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47  
Using the WD Sentinel Server’s Features . . . . . . . 49  
Using the Launchpad (Internal Users). . . . . . . . . . . . . . . . . . . . . . .49  
Accessing Shared Folders Over Your Network. . . . . . . . . . . . . . . .56  
Accessing Computers and Shared Folders Remotely. . . . . . . . . . .57  
Backing up (Windows PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58  
Backing up with Time Machine (Mac). . . . . . . . . . . . . . . . . . . . . . .61  
Recovering/Restoring (Windows PC) . . . . . . . . . . . . . . . . . . . . . . .64  
Recovering/Restoring (Mac) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65  
Backing up your WD Sentinel Server . . . . . . . . . . . . . . . . . . . . . . .66  
Recovering the WD Sentinel Server to Factory Defaults . . . . . . . . .66  
7
Best Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81  
Setting up the WD Sentinel RX4100. . . . . . . . . . . . . . . . . . . . . . . .81  
Setting up Client Computers . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81  
Using the WD Sentinel RX4100 Efficiently . . . . . . . . . . . . . . . . . . .81  
Replacing Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82  
Sharing Files with External Users . . . . . . . . . . . . . . . . . . . . . . . . . .82  
Shutting Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82  
8
9
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83  
First Steps Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83  
Specific Problems and Corrective Actions . . . . . . . . . . . . . . . . . . .83  
Managing iSCSI Storage . . . . . . . . . . . . . . . . . . . . . 85  
iSCSI Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85  
iSCSI Roles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85  
Managing iSCSI Targets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85  
10 Regulatory and Warranty Information. . . . . . . . . . . 90  
Regulatory Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90  
WD SENTINEL RX4100  
ADMINISTRATOR AND MAINTENANCE GUIDE  
TABLE OF CONTENTS – ii  
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Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92  
GNU General Public License (“GPL”) . . . . . . . . . . . . . . . . . . . . . . .93  
11 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94  
Hardware Replacement Procedures. . . . . . . . . . . . . . . . . . . . . . . .94  
Before You Begin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94  
Installing the WD Sentinel Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . .95  
Replacing a Hard Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96  
Removing the Unit Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98  
Replacing the Internal Power Supply . . . . . . . . . . . . . . . . . . . . . .100  
Replacing a Server Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102  
Replacing the Riser Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104  
Replacing the Mid-plane Card . . . . . . . . . . . . . . . . . . . . . . . . . . .105  
WD Sentinel RX4100 Administrator Reference Sheet . . . . . . . . . .106  
12 Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107  
WD SENTINEL RX4100  
ADMINISTRATOR AND MAINTENANCE GUIDE  
TABLE OF CONTENTS – iii  
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IMPORTANT USER INFORMATION  
Important User Information  
1
Important Safety Instructions  
Handling Precautions  
Recording Your WD Product Information  
About This Guide  
Important Safety Instructions  
This device is designed and manufactured to assure personal safety. Improper use can  
result in electric shock or fire hazard. The safeguards incorporated into this unit will protect  
you if you observe the following procedures for installation, use, and servicing.  
Follow all warnings and instructions marked on the product.  
Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or  
aerosol cleaners. Use a damp cloth for cleaning.  
Do not use this product near any liquids.  
Do not place this product on an unstable surface. The product may fall, causing serious  
damage to the product.  
Do not drop the product.  
Do not block the slots and openings on the back or bottom side of the chassis; to  
ensure proper ventilation and reliable operation of the product and to protect it from  
overheating, these openings must not be blocked or covered. Making sure the server is  
standing upright also helps prevent overheating.  
Operate this product only from the type of power indicated on the marking label. If you  
are not sure of the type of power available, consult your dealer or local power company.  
Do not allow anything to rest on the power cord. Do not locate this product where  
persons will walk on the cord.  
If an extension cord is used with this product, make sure that the total ampere rating of  
the equipment plugged into the extension cord does not exceed the extension cord  
ampere rating. Also, make sure that the total rating of all products plugged into the wall  
outlet does not exceed the fuse rating.  
Never push objects of any kind into this product through the chassis slots as they may  
touch dangerous voltage points or short out parts that could result in a fire or electric  
shock.  
Unplug this product from the wall outlet and refer servicing to qualified service personnel  
under the following conditions:  
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When the power cord or plug is damaged or frayed.  
If liquid has been spilled on the product.  
If the product has been exposed to rain or water.  
If the product does not operate normally when the operating instructions are fol-  
lowed. Adjust only those controls that are covered by the operating instructions  
since improper adjustment may result in damage and require extensive work by a  
qualified technician to return the product to normal condition.  
-
If the product has been dropped or the chassis has been damaged.  
1
WD SENTINEL RX4100  
ADMINISTRATOR AND MAINTENANCE GUIDE  
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IMPORTANT USER INFORMATION  
-
If the product exhibits a distinct change in performance, contact WD Customer Sup-  
port at http://support.wd.com.  
WARNING! The WD Sentinel™ Server uses a lithium battery, type CR2032. There  
is danger of an explosion if the battery is incorrectly replaced.  
Replace only with the same or equivalent battery type recommended  
by the manufacturer. Dispose of used batteries according to the  
manufacturer’s instructions.  
Handling Precautions  
WD products are precision instruments and must be handled with care during unpacking  
and installation. The WD Sentinel server may be damaged by rough handling, shock, or  
vibration. Be aware of the following precautions when unpacking and installing your external  
storage product:  
Do not drop or jolt the WD Sentinel server.  
Do not move the unit while it is powered on.  
Do not use this product as a portable drive.  
Recording Your WD Product Information  
Remember to write down the following WD product information, which is used for setup and  
technical support. Your WD product information is found on the label on the bottom of the  
device.  
Serial Number  
Model Number  
Purchase Date  
System and Software Notes  
About This Guide  
This Administrator and Maintenance Guide provides detailed instructions and information for  
WD-specific interface elements and functions. Unless otherwise noted, refer to  
Microsoft® Online Help for standard interface elements and functions. This guide uses the  
following conventions:  
Convention  
Bold font  
Used for ...  
Names of items on a page such as menus, buttons, option names, fields, and  
tabs that the user must click or complete and keys the user must press.  
Note:  
Extra, but not vital, information  
Important:  
Essential Information to know or to prevent problems when using the  
WD Sentinel server  
WARNING!  
Vital information for operating the WD Sentinel server or to prevent damage to  
the server or your computer.  
2
WD SENTINEL RX4100  
ADMINISTRATOR AND MAINTENANCE GUIDE  
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PRODUCT OVERVIEW  
Product Overview  
2
Getting to Know Your WD Sentinel RX4100 Server  
Key Features  
System Requirements and Compatibility Information  
Technical Specifications  
Product Views  
Indicators  
Where to Find Help  
Getting to Know Your WD Sentinel RX4100 Server  
Congratulations on your purchase of the WD Sentinel RX4100 Small Business Storage  
Server. Whether you’re an IT expert or not, WD Sentinel RX4100 is easy to install and  
provides secure unified storage (NAS and iSCSI SAN), complete data protection for up to 25  
computers, and remote file access for your employees and trusted vendors while in the  
office or from anywhere.  
Key Features  
Easy installation: The easy setup process allows you to integrate WD Sentinel RX4100 into  
your office network like a pro. The administration dashboard quickly guides you through the  
process including adding users, setting up data access, creating shared folders, and  
scheduling backups.  
Easy administration: WD Sentinel RX4100 is the ideal storage server for small business in  
1U rack mountable design. Its easy administration features include four drive bays with hot  
swappable design; redundant user-serviceable power supplies; user-serviceable fans and  
email alerts. In the event that an IT professional’s assistance is needed, the WD Sentinel  
RX4100 allows them to manage the server remotely. Now that’s easy!  
Comprehensive data protection for your entire office has never been easier.  
The drives inside: Pre-configured with hard drives optimized for reliability, quality and  
performance.  
RAID: Pre-configured with RAID 5 for added data protection and drive redundancy.  
Automatic backup and restore software for Windows® clients: The included  
backup software saves time and space by performing a full Bare Metal Backup the first  
time and then automatically backing up only the data that has changed since the  
previous backup – using block-level deduplication technology. In the event of a data loss  
or a drive failure on a client computer, the WD Sentinel RX4100’s fast and easy restore  
function finds your files or lets you restore an entire system to get you up and running  
again quickly.  
Time Machine backup support for Mac OS® clients: WD Sentinel RX4100 offers  
seamless support for backing up Mac OS clients to your WD Sentinel server using the  
Apple Time Machine backup utility.  
Dual Ethernet ports: Comes pre-configured in Adaptive Fault Tolerance, which keeps  
your network available by automatically switching to the second Ethernet port if the first  
one should fail.  
3
WD SENTINEL RX4100  
ADMINISTRATOR AND MAINTENANCE GUIDE  
Download from Www.Somanuals.com. All Manuals Search And Download.  
       
PRODUCT OVERVIEW  
Optional dual power supply: WD Sentinel RX4100 offers the small business owner the  
option of adding a redundant external power supply that will take over should a power  
surge or other failure damage the internal power supply. With the optional external  
power supply you have the added peace of mind knowing that your system will remain  
operational and available.  
Optional off-site disaster recovery protection: Protect your business data against a  
disaster by creating an off-site copy to the cloud using KeepVault®*. Learn more at  
wdc.keepvault.com.  
Secure remote access: WD Sentinel RX4100 is perfect for businesses with employees  
working remotely or in home offices. You have the security of knowing all your business files  
are safely stored on your WD Sentinel RX4100 small business storage server. With built-in  
secure remote access, remote employees, contractors, or clients with access permissions  
can securely access business data from any computer with an Internet connection.  
Leading-edge performance: With dual Gigabit Ethernet connectivity, WD Sentinel  
RX4100 delivers read speeds up to 105 MB/s through the Gigabit Ethernet interface. That's  
three times faster than most network drives in this category today.  
Note: As tested using a file transfer simulator using two sets of large files averaged over 10 runs.  
Fully Compatible with Mac OS Clients: WD Sentinel RX4100 supports Apple® Filing  
Protocol (AFP), which provides complete compatibility for Mac OS-based client machines.  
Discover WD Sentinel RX4100 automatically using Bonjour®, seamlessly back up your Mac  
OS clients using Apple’s Time Machine® backup utility, enjoy faster data transfer over  
Ethernet using AFP, and manage your WD Sentinel RX4100 server using the Administration  
Dashboard application for Mac.  
Virtualize WD Sentinel storage using iSCSI Target: WD Sentinel RX4100 offers built-in  
iSCSI target functionality integrated within Dashboard to easily manage the setup,  
administration and deployment of iSCSI Storage. IT Pro’s and advanced users have the  
ability to partition their WD Sentinel RX4100 for both NAS File-based storage as well as  
iSCSI-SAN with the iSCSI Target solution powered by StarWind®. This capability enables  
the Administrator to create and manage multiple iSCSI targets to meet the specific needs of  
their dynamic IT environments.  
A total solution with industry-leading technology partners: We combined hardware  
and software from industry leaders to deliver a reliable, secure and easy-to-manage storage  
server designed specifically for small business environments. WD Sentinel RX4100 features:  
Best-in-class hard drives – Equipped with hard drives that feature high capacity  
storage, peak performance and best-in-class reliability.  
Intel® Atom™ processor – Built with Intel Atom dual core processor inside, WD  
Sentinel™ RX4100 can easily handle your small business’s day-to-day computing and  
file storage demands.  
Windows Storage Server 2008 R2 Essentials – Microsoft Windows Storage Server  
2008 R2 Essentials operating system provides the intuitive, reliable and scalable storage  
solution your small business needs to quickly and efficiently organize, protect and share  
your critical business data using the familiar Windows user experience. With enterprise-  
class, server-based, block-level de-dupe backup capability you can be confident that  
your data is well protected.  
*Pre-installed in US-only models  
4
WD SENTINEL RX4100  
ADMINISTRATOR AND MAINTENANCE GUIDE  
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PRODUCT OVERVIEW  
Real-time system status through the administration dashboard: Receive critical  
system updates via the built-in email alerts functionality. Or view real-time updates for the  
system, RAID and network status through WD Sentinel’s dashboard, which includes easy-  
to-use task wizards to help you set backup schedules, administer user accounts and  
manage public and private shares.  
Compatible with multiple operating systems: WD Sentinel RX4100 includes the  
Connector software for Windows XP, Windows Vista®, Windows 7, Windows 8, Mac OS X  
Mountain Lion, Mac OS X Lion, Mac OS Snow Leopard and Mac OS X Leopard. Support for  
major network file-system protocols enables cross-platform compatibility and file sharing  
among Windows, Mac® and Linux®/UNIX® operating systems. Supports Time Machine  
backup for Mac OS clients. Compatibility may vary depending on user’s hardware  
configuration and operating system.  
Stream digital media anywhere in your network: With the built-in DLNA® server your  
employees can access any shared media libraries on the network rather than maintaining  
copies on their individual computers. You can also stream digital content like videos, music,  
or digital signage for employees, vendors or clients using remote web access.  
Optional off-site disaster recovery service*: Every small business should have a plan to  
protect its data from an unforeseen disaster (fire, flood, earthquake, etc.). KeepVault is an  
off-site cloud-based data backup and disaster recovery solution that’s integrated within  
WD Sentinel’s administration dashboard. It’s easy to use and cost-effective and provides  
built-in support for data encryption and compression for secure and faster data transfer.  
WD Guardian Services: When you need a little help from an expert, we’ll take care of you!  
WD Guardian Services offers flexible, affordable and hassle-free technical support and  
extended warranty plans with a variety of benefits. Choose the plan that works best for your  
business. Visit www.wdguardian.com for details.  
Why WD?: Western Digital has been making hard drives for over 40 years. We know how to  
build drives to store and protect your data because we understand that your company’s  
data is paramount to your business success.  
*Pre-installed in US-only models  
5
WD SENTINEL RX4100  
ADMINISTRATOR AND MAINTENANCE GUIDE  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PRODUCT OVERVIEW  
Package Contents  
Small Business Storage Server  
1 RJ-45 Ethernet cable  
1.8 meter power cord  
Basic Installation Guide  
WD Sentinel RX4100  
1.8 meter power cord  
Ethernet cable  
Basic Install Guide  
For information on additional accessories, visit:  
US  
www.shopwd.com or www.wdstore.com  
Europe  
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•
•
•
•
•
•
•
Austria: www.wdstore.de  
United Kingdom: www.wdstore.eu  
France: www.wdstore.fr  
Italy: www.wdstore.it  
Germany: www.wdstore.de  
Spain: www.wdstore.es  
Netherlands: www.wdstore.nl  
Rest of EU Countries: www.shopwd.eu or www.wdstore.eu  
All others  
Contact WD Technical Support in your region. For a list of Technical  
Support contacts, visit http://support.wd.com and see Knowledge  
Base Answer ID 1048.  
6
WD SENTINEL RX4100  
ADMINISTRATOR AND MAINTENANCE GUIDE  
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PRODUCT OVERVIEW  
System Requirements and Compatibility Information  
Requirement  
Description  
Windows 8  
Client Operating System  
Compatibility  
•
•
•
Basic (x86 and x64)  
Pro (x86 and x64)  
Enterprise (x86 and x64)  
Windows 7  
•
•
•
•
•
•
Home Basic (x86 and x64)  
Home Premium (x86 and x64)  
Professional (x86 and x64)  
Ultimate (x86 and x64)  
Enterprise (x86 and x64)  
Starter (x86)  
Windows Vista  
•
•
•
•
•
•
Home Basic with Service Pack 2 (SP2) (x86 x64)  
Home Premium with SP2 (x86 and x64)  
Business with SP2 (x86 and x64)  
Ultimate with SP2 (x86 and x64)  
Enterprise with SP2 (x86 and x64)  
Starter with SP2 (x86)  
Windows XP  
•
•
•
Home with Service Pack 3 (SP3)  
Professional with SP3  
Media Center 2005 with SP3  
Mac OS X  
•
•
•
•
Leopard  
Snow Leopard  
Lion  
Mountain Lion  
File sharing support for Linux and UNIX  
Local Network  
•
Router/switch (Gigabit Ethernet recommended to maximize  
performance)  
•
DHCP enabled  
Broadband Access  
Required for remote access outside the LAN  
Display and Peripherals  
•
•
•
Super VGA (800 x 600) or higher-resolution monitor  
USB Keyboard  
USB Mouse or compatible pointing device  
7
WD SENTINEL RX4100  
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PRODUCT OVERVIEW  
Technical Specifications  
Specification  
Description  
Interfaces  
•
•
•
High performance (10/100/1000) Gigabit Ethernet connection  
2 ports of powered USB 3.0  
1 port of powered USB 2.0  
I/O ports  
•
•
•
•
2 Ethernet (RJ-45 Ports)  
2 USB 3.0 Ports  
1 USB 2.0 Port  
1 VGA Port  
Supported protocols  
Internal hard drives  
CIFS/SMB, NFS, HTTP, HTTPS, WebDAV, AFP  
4 WD 3.5-inch SATA Best in Class hard drives with  
RAID-specific time-limited error recovery (TLER)  
Pioneered by WD, this feature prevents drive fallout caused by the  
extended hard drive error-recovery processes common to desktop  
drives.  
Approved Drive Models  
For a complete list of approved drive models, search for Answer ID  
9443 in the WD Knowledge Base at http://support.wd.com.  
CPU  
Intel Atom Dual Core 1.80 Ghz  
4 GBytes SODIMM DDR3-800  
Memory  
Drive bays  
•
•
•
4 3.5 inch hard drive bays  
Hot swap capable  
Trayed design  
RAID level  
•
RAID 5 with automatic rebuild functionality  
Physical dimensions  
•
•
•
Length: 26 inches (660 mm)  
Width: 19 inches (482.1 mm)  
Height: 1.75 inches (44 mm)  
Weight  
•
•
8 TB and 12 TB: 26.627 lbs (12.078 kgs)  
16 TB: 27.112 lbs (12.298 kgs)  
Capacities  
•
•
•
8 TB (4 x 2 TB); 6 TB Usable  
12 TB (4 x 3 TB); 9 TB Usable  
16 TB (4 x 4 TB); 12 TB Usable  
Power  
•
•
1 internal power supply  
1 external power port for failover (optional)  
Power supply  
•
•
•
Input voltage: 100 to 240 V AC  
Input frequency: 50 to 60 Hz  
Output voltage: 19V DC, up to 6.32A  
Temperature  
Switches  
•
•
Operating temperature: 0 to 35 °C (32 to 95 °F)  
Non-operating temperature: -40 to 70°C (-40 to 158 °F)  
•
•
Power  
Recovery  
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PRODUCT OVERVIEW  
Specification  
Description  
LEDs  
1 Drive Activity LED  
•
•
Flashing blue indicates data transfer to/from any drive  
Black indicates no drive activity  
1 Drive Warning LED  
•
•
Solid RED indicates fault on any drive.  
Black indicates no drive warnings  
1 Drive Status LED  
•
•
•
Flashing blue indicates data transfer to/from any drive  
Solid RED indicates a drive fault  
Black indicates no drive activity  
1 Power LED  
•
•
•
Flashing blue indicates boot status  
Flashings RED indicates a fault condition  
Solid blue once booted, and there are no pending fault  
conditions, indicates a good operational state  
Black indicates inactive state  
•
2 Ethernet Port LEDs  
•
•
•
Flashing green indicates activity  
Solid amber indicates that there is a link connection  
Black indicates inactive state  
4 Drive Tray LEDs  
•
•
Flashing blue or solid blue indicates drive activity  
Solid RED indicates drive fault (Drive must be replaced)  
Operating System  
Backups  
Windows Storage Server 2008 R2 Essentials  
25-client computer support for backup (Windows and Mac OS  
Client computers)  
Restore  
•
•
Bare metal restore for Windows clients  
File/folder level restore  
Product Views  
Front View (With Bezel)  
Bezel Lock  
Bezel  
Bezel Lock  
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PRODUCT OVERVIEW  
Front View (Without Bezel)  
Power Button  
Status LEDs USB 2.0 port  
Drive Trays  
Back View  
Internal Power  
Supply port  
Gigabit Ethernet  
ports 1 & 2  
External DC In  
Power port  
VGA port  
Recovery button  
USB 3.0 ports  
1 & 2  
Indicators  
Component  
Icon  
Description  
Ethernet ports  
Connect the device to a local network.  
Power port  
Connects the device to an AC power cord and the power outlet.  
RECOVERY  
Recovery button  
USB ports  
Button on the back of the server recovers the server (including the operating  
system) while using a USB drive in an event of an OS corruption.  
Connects with USB 2.0 and 3.0 devices such as a USB storage, USB mouse,  
USB keyboard, or a UPS.  
VGA port  
Connects to your VGA monitor  
DC In connector  
Connects the device to a DC power cord and the power outlet.  
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PRODUCT OVERVIEW  
LEDs  
The LEDs on the WD Sentinel identify the status of the unit.  
LED  
Color  
Black  
Blue  
State  
Off  
Description  
Power LED  
WD Sentinel server is currently inactive.  
Flashing  
Solid  
WD Sentinel server is currently booting the software.  
Blue  
WD Sentinel server has successfully booted the  
software and is operational.  
Red  
Flashing  
Indicates that a serious fault has occurred and  
needs immediate attention.  
Drive  
Activity  
Black  
Blue  
Off  
Indicates no drive activity.  
Flashing  
Off  
Indicates that data is transferring to/from the drives.  
Indicates no drive warning activity.  
Drive  
Warning  
Black  
Red  
Solid  
Indicates that a serious fault has occurred on the  
drives.  
Drive Status Black  
Off  
Indicates no drive status activity.  
Indicates data transfer to/from drives.  
Indicates a drive fault.  
Blue  
Red  
Flashing  
Solid  
Off  
Drive LEDs  
Black  
Blue  
Red  
If the LED is off while other drive LEDs are on, no  
drive is installed in the bay.  
Flashing  
Solid  
Drive is currently active. Note that all lights in a RAID  
system are active at the same time by design.  
Indicates drive failure. Replace this drive as soon as  
possible. The system is no longer RAID protected  
until the drive is replaced and the RAID structure is  
repaired.  
Ethernet  
Port  
Black  
Green  
Amber  
Off  
Indicates an inactive state.  
Indicates link activity.  
Flashing  
Solid  
Indicates that there is a link connection  
11  
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PRODUCT OVERVIEW  
Where to Find Help  
This manual provides step-by-step instructions and other important information regarding  
your WD product. It is meant for the person serving as the administrator of the  
WD Sentinel RX4100. You can download translated versions and updates to this manual  
from http://products.wd.com/updates. For more information and news about this product,  
visit our website at http://www.wd.com/.  
Additional Reference  
Description  
Basic Installation Guide  
Included in the product box or available at  
http://products.wd.com/WDSentinel-RX4100 helps you install the  
WD Sentinel server.  
WD Online Help  
Specific descriptions and instructions accessed on  
WD-specific (Monitor) pages on the Dashboard.  
Microsoft Online Help  
•
Access detailed explanations and instructions for a particular  
page by clicking the Help button  
at the top right of the  
Dashboard.  
•
•
Search for help on a specific topic or term by entering it in the  
Microsoft Online Help search field at the top right of the page.  
Access the entire Microsoft Online Help system by clicking  
Microsoft Online Help.  
Important: Not all Microsoft Online Help is applicable to the WD Sentinel RX4100.  
The WD Online Help and this Administrator's Guide take precedence over the  
Microsoft Online Help.  
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CONNECTING THE SERVER AND GETTING STARTED  
Connecting the Server and Getting Started  
3
User Roles and Responsibilities  
How the WD Sentinel RX4100 Fits into Your Office  
Connecting the WD Sentinel RX4100 Server to Your Network (Preferred Method)  
Connecting the WD Sentinel RX4100 Server from a Client Computer (Optional Method)  
Setting up your WD Sentinel Server (one time only)  
Connecting your Computers  
Rebooting the WD Sentinel Server  
This chapter steps you though the process of connecting and setting up your WD Sentinel  
RX4100 server and connecting it to computers in your network.  
User Roles and Responsibilities  
Types of WD Sentinel RX4100 Users  
At a high level there are two categories of users who need to access one or more features of  
your WD Sentinel server.  
Administrator—This is the person who performs the setup and routine management  
tasks on the WD Sentinel server. This person is also the holder of the Administrator  
password of your WD Sentinel server.  
Users—You can have up to 25 user accounts on your WD Sentinel server. These can  
be:  
-
Internal Users – The internal users are typically the employees (including the Admin-  
istrator) in your office, working locally or occasionally from a remote location (e.g.  
Sales Staff), who need to access business data and server resources.  
-
External Users – The external users are the customers and business  
partners with whom you need to exchange business data.  
The WD Sentinel server offers different paradigms for each type of user. The table below  
provides a view into the usage model and tasks for each category of users.  
External Users  
(e.g., Clients or Business  
Partners)  
Administrator  
(e.g., Business Owner)  
Internal Users  
(e.g., Employees)  
Primary Setup Tasks  
Primary Setup Tasks  
None  
Primary Setup Tasks  
•
•
•
Physically connects the  
WD Sentinel server to the  
network.  
•
•
None  
Configures the  
WD Sentinel server itself. This  
is a one-time procedure.  
Connects a Mac or Windows  
PC to the WD Sentinel server  
by installing Connector  
software on it.  
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External Users  
(e.g., Clients or Business  
Partners)  
Administrator  
(e.g., Business Owner)  
Internal Users  
(e.g., Employees)  
Primary User Interface  
Primary Interface  
Primary Interface  
•
Dashboard - Signs in using the  
Administrator password (no  
username required).  
•
Launchpad - Signs in using the  
assigned user name and  
password.  
•
Remote Web Access - Signs in  
using the assigned user name  
and password.  
Secondary Interface  
•
Remote Web Access -  
While accessing remotely,  
signs in using the assigned  
user name and password.  
Dashboard Task Examples  
Launchpad Task Examples  
Remote Web Access Task  
Examples  
•
Sets up user accounts and  
assigns permissions.  
•
Accesses data on shared  
storage.  
•
Accesses data on shared  
storage.  
•
•
Manages shared folders.  
•
•
Starts manual backups.  
•
Accesses media library.  
Sets up and manages  
Launches Remote Web  
Access.  
automatic backup schedule.  
•
Manages WD Sentinel server  
settings, resolves any alerts,  
and monitors server  
Remote Web Access Task  
Examples  
performance.  
•
•
•
Accesses data on shared  
storage.  
•
•
•
Sets up Remote Web Access.  
Manages updates.  
Connects to the PCs in the  
office remotely.  
Creates and manages iSCSI  
targets.  
Accesses media library.  
Note: For each user account, the WD Sentinel server enables the Administrator to set granular permissions  
for various shared folders as well as server resources, such as Remote Web Access. At all times, the  
users are only able to access the data on the server and other server resources for which they have  
permissions.  
14  
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CONNECTING THE SERVER AND GETTING STARTED  
How the WD Sentinel RX4100 Fits into Your Office  
Connecting the WD Sentinel RX4100 Server to Your Network  
(Preferred Method)  
Use the following steps to physically connect your WD Sentinel RX4100 to your network.  
1. Connect your monitor to the VGA port on the rear of your WD Sentinel server.  
2. Connect your USB keyboard and USB mouse to the USB ports on your WD Sentinel  
server.  
3. Using the provided ethernet cable, connect the WD Sentinel server (either ethernet port  
1 or 2) to a DHCP-enabled LAN.  
4. Using the provided AC power cord, connect the WD Sentinel server to an electrical  
outlet or a UPS.  
5. Turn on your monitor.  
6. Press the power button on the front of your WD Sentinel unit.  
Once the WD Sentinel boot up process is complete, the Windows Storage Server 2008  
R2 Language Selection screen displays. The Power LED on the front of the WD Sentinel  
server will display a solid blue light.  
WARNING! This process takes a few minutes. Do not interrupt the process. Do  
not power off or disconnect the WD Sentinel server.  
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CONNECTING THE SERVER AND GETTING STARTED  
Connecting the WD Sentinel RX4100 Server from a Client  
Computer (Optional Method)  
As an alternative, you can set up your WD Sentinel RX4100 using a client computer without  
connecting a monitor, keyboard, and mouse to your server. Use the following steps to  
connect your WD Sentinel RX4100 to your network from a client computer.  
1. Using the provided ethernet cable, connect the WD Sentinel server (either ethernet port  
1 or 2) to a DHCP-enabled LAN.  
2. Using the provided AC power cord, connect the WD Sentinel server to an electrical  
outlet or a UPS.  
3. Press the power button on the front of your WD Sentinel unit.  
Once the WD Sentinel boot up process is complete, the LED on the front of the  
WD Sentinel server will display a solid blue light.  
WARNING! This process takes a few minutes. Do not interrupt the process. Do  
not power off or disconnect the WD Sentinel server.  
4. In the address field of an open browser window, type http://WDSENTINEL/Setup.  
Note: The default server name (i.e., WDSENTINEL) is used to access the WD Sentinel  
setup screen in your browser. If other devices using the same name are located on  
your network, you will first have to either disconnect the device before setting up  
your new WD Sentinel server, or obtain the IP address of your new WD Server. Once  
the IP address is obtained, type http://<IP address>/setup in your browser window.  
5. Select Download and run the setup wizard button.  
6. At the warning prompts, click Run and Yes as appropriate.  
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Setting up your WD Sentinel Server (one time only)  
Your WD Sentinel RX4100 server is now ready to be configured. This section describes how  
to use the one time setup wizard to configure your server for first use.  
1. Select the server language from the list provided and click the arrow to continue.  
2. Verify the localization settings, or select the correct values from the drop-down lists, then  
click Next.  
3. Review the date and time, and select the checkbox to verify the settings, then click  
Next.  
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CONNECTING THE SERVER AND GETTING STARTED  
4. Read the Microsoft and Western Digital license agreements, select both checkboxes to  
accept the license terms, then click Next.  
5. Personalize your WD Sentinel server:  
a. The WD Sentinel server has a default name of WDSENTINEL. Enter a unique name  
for your WD Sentinel server, for example, Company-Name (must contain 1-12  
characters; may be upper case, lower case, numeric, or a combination; may include  
hyphens but no spaces or special characters).  
WARNING! THIS IS THE ONLY TIME YOU CAN NAME YOUR WD SENTINEL  
SERVER. You must assign it a unique name to avoid naming  
conflicts should you ever have more than one WD Sentinel server  
on the network.  
b. Enter and confirm a password (must be at least 8 characters long and contain at  
least three of the following categories: uppercase letters, lowercase letters,  
numbers, and symbols; spaces are allowed.) This is the Administrator password.  
You will use it later to connect the client computers to your WD Sentinel server and  
to access the Administration Dashboard.  
c. Enter a hint to remind you of the password.  
WARNING! If you forget the Administrator password, it may not be possible to  
recover it, and you could potentially lose all of your data. Make sure  
to record the password and keep it in a safe location.  
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CONNECTING THE SERVER AND GETTING STARTED  
6. Click Next and specify how the server software updates should occur. Make a selection:  
Note: If you choose the first or second option on this screen, the subsequent installation  
process may take longer, depending on Windows updates that may be available at  
this time.  
The installation begins. The progress bar on the screen informs you of the installation’s  
progress.  
Important: This process can take an hour or more and may restart more than once.  
Do not interrupt the process. Do not power off or disconnect the  
WD Sentinel server.  
The completion screen appears:  
Your WD Sentinel server configuration is complete and the server is ready for  
use!  
7. Click Connect to connect the computer you’re using to the server. To connect a  
computer, proceed to “Connecting your Computers” on page 20.  
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CONNECTING THE SERVER AND GETTING STARTED  
Connecting your Computers  
Once you’ve set up your WD Sentinel server, you can connect up to 25 Windows PCs or  
Mac computers to your WD Sentinel server.  
Installing the Connector software joins the client computer to your WD Sentinel Server and  
installs Launchpad and Dashboard.  
Users use Launchpad to access server resources they have rights to.  
The Administrator (you) accesses Dashboard for such tasks as managing the  
WD Sentinel server, setting up user accounts, and managing access to shared folders.  
Important Steps  
Before installing Connector software on a computer, ensure that:  
The computers have all the latest mandatory and optional operating system updates  
installed.  
There are no active backups in progress on the WD Sentinel server.  
Note: Check for active backups on the Dashboard’s Computers and Backup tab. The  
screen displays backups in progress.  
Once the Connector software is installed, set up an automated scheduled backup (for after  
working hours ) using the Dashboard. Running a manual backup during the initial connection  
process will impact overall system performance.  
Connecting a Windows PC  
Use the following procedure to connect a Windows PC to the WD Sentinel server.  
For steps on connecting a Mac using the Connector software, see “Connecting a Mac” on  
page 23.  
1. In the address field of an open browser window, enter  
http://<servername>/connect. Example: http://myserver/connect.  
<servername> is the name you gave your server in “Connecting the WD Sentinel  
RX4100 Server from a Client Computer (Optional Method)” on page 16.  
If you clicked Connect in Step 7 on page 19, continue to Step 2.  
2. Click Download software for Windows:  
3. At the warning prompts, click Run and Yes as appropriate.  
Note: If prompted to do so, type the user name and password of an account that has  
administrator permissions on this client computer.  
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4. Review the overview of the Connect Computer to the Server wizard, then click Next.  
5. Read the information about events that may occur during the installation, then click  
Next.  
6. Installation begins. The progress bar identifies where you are in the installation process.  
The installation process may take 30 minutes or more to complete.  
7. At the logon screen, enter the Administrator password for your WD Sentinel server, then  
click Next.  
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8. Enter a unique description for your computer so the server will be able to distinguish  
yours from others on the network, then click Next.  
9. Review and select a wake-up option, then click Next.  
10. Review the Microsoft program options, make a selection, then click Next.  
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11. The installation completes. Select the checkbox for opening the Dashboard to  
configure and monitor the WD Sentinel server. Click Finish:  
Note: It is a best practice to select the Open Dashboard to administer your server option  
and launch the Dashboard after finishing the Connector software installation. To take  
advantage of shared storage capabilities of your WD Sentinel server, on the  
Dashboard, create a user account (and assign access privileges to the shared  
folders.  
12. Close the browser. If you selected the checkbox, the Dashboard Sign in screen  
displays.  
Connecting a Mac  
Use the following procedure to connect your Mac computer to the WD Sentinel server.  
For steps on connecting a Windows PC using the Connector software, see “Connecting a  
Windows PC” on page 20.  
1. In the address field of an open browser window on the Mac you’d like to connect, enter  
http://<servername>.local/connect. Example: http://myserver.local/connect  
<servername> is the name you gave your server in “Connecting the WD Sentinel  
RX4100 Server from a Client Computer (Optional Method)” on page 16.  
2. Click Download software for Mac:  
The Mac Connector software downloads to your Download directory.  
3. Click the Download icon on the Menu bar at the bottom of the screen:  
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4. Select MacConnector.dmg. The MacConnector window opens.  
5. Double-click MacConnector.  
6. Review the warning screen, then click Open.  
7. Enter the user name and password of an account that has administrator permissions on  
this client computer, then click OK.  
8. Review the “Connect Computer to the Server” wizard, then click Continue.  
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9. Enter the name you gave your server in “Connecting the WD Sentinel RX4100 Server  
from a Client Computer (Optional Method)” on page 16, then click Continue. (Example:  
myserver)  
The software checks to ensure that your Mac meets the required prerequisites.  
10. Once completed, enter an identifying name for your computer, then click Continue.  
11. Enter the Administrator password for your WD Sentinel server, then click Continue.  
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12. Enter a unique description for your computer so the server will be able to distinguish  
yours from others on the network, then click Continue.  
13. The installation completes. If not selected, select the checkbox for opening the  
Windows Server Launchpad at startup, then click Close.  
Note: It is a best practice to select the Open Dashboard to administer your server option  
and launch the Dashboard after finishing the Connector software installation. To take  
advantage of shared storage capabilities of your WD Sentinel server, on the  
Dashboard, create a user account and assign access privileges to the shared  
folders.  
Rebooting the WD Sentinel Server  
Following is the cleanest procedure for rebooting the WD Sentinel server.  
Note: This procedure should only be used after you’ve logged into the Dashboard and  
created a user account.  
1. On the Dashboard Home page, click the Server Settings link on the upper right of the  
window.  
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2. On the bottom left of the General screen, click the shutdown arrow and select Restart:  
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MANAGING THE WD SENTINEL SERVER (DASHBOARD)  
Managing the WD Sentinel Server (Dashboard)  
4
Setting up WD Sentinel Server & Connecting Computers  
Accessing the Dashboard  
Adding a User Account  
Performing Dashboard Tasks  
Using the Home Page  
Managing User Accounts  
Managing Computers and Backups  
Managing Server Folders and Hard Drives  
Monitoring Add-ins  
Monitoring System Health and Alerts  
Updating Software  
Managing Server Settings  
Shutting Down the Server  
Setting up WD Sentinel Server & Connecting Computers  
This chapter assumes you have followed the Administrator's Basic Install Guide to initialize  
the WD Sentinel server and have connected at least one computer to the server. To review  
the setup steps see “Connecting the Server and Getting Started” on page 13 of this manual.  
Important: As a best practice, perform the tasks outlined in this guide using a client  
computer on which you’ve installed the connector software, not directly from  
the WD Sentinel server.  
Accessing the Dashboard  
To access the Dashboard from the Server:  
1. Click >All Programs >Windows Storage Server 2008 R2>Windows Storage  
Server 2008 R2 Dashboard.  
2. On the Dashboard Sign in page, enter the Administrator password (created during  
setup) and click the right arrow:  
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To access the Dashboard (Windows):  
If you’re operating systems Then...  
is...  
Windows 8  
•
•
•
•
On your keyboard, click the Windows button  
.
On the Metro Start page, right-click in a blank area of the screen.  
Select All apps  
.
Under Windows Server Storage Server 2000 R2, click Windows  
Server 2008 R2 Dashboard.  
Windows 7  
Windows Vista  
•
•
Click  
>All Programs >Windows Storage Server 2008  
R2>Windows Storage Server 2008 R2 Dashboard.  
Windows XP  
Click Start>Programs>Windows Storage Server 2008  
R2>Windows Storage Server 2008 R2 Dashboard  
3. On the Dashboard Sign in page, enter the Administrator password (created during  
setup) and click the right arrow:  
To access the Dashboard (Mac):  
1. In the Application folder, select Windows Server Dashboard.  
2. For first time sign-in, enter the server name,  
(obtained in Step 5 of “Setting up your WD Sentinel Server (one time only)” on page 17)  
and the Administrator password (created during setup).  
3. Enter the following information on the Remote Desktop Connection screen:  
User Name: Enter Administrator.  
Administrator Password: The password you created during setup.  
Computer Name: The server name you created during setup.  
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The Dashboard appears:  
The Dashboard Home page displays:  
Navigation icons  
Alerts and Server Settings  
Help icon  
Tabs  
Tasks Pane  
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Adding a User Account  
Use the following steps to add a user account to the WD Sentinel server.  
1. Open the WD Sentinel Dashboard (see “Accessing the Dashboard” on page 28)  
2. Click Users on the Navigation menu.  
3. Select Add a user account in the Task Pane.  
4. Enter the following information:  
a. First Name, Last Name: Enter the user’s first and last name.  
b. User account name: Enter a user account name. This is used to log into the  
Launchpad.  
c. Password, Confirm Password: Enter your password for the assigned user, then enter  
the same password to confirm the password.  
5. Click Next.  
6. Select the access levels for the user account from the pull-down menu.  
Read Only: Allows the user to only read the information in the associated files.  
Read/Write: Allows the user to create, change, and delete the information in the to the  
associated files.  
No Access: Choose this setting to deny access to a shared folder.  
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7. Click Next.  
8. Place a check next to the information you’d like the user to access using the Remote  
Web Access feature.  
Select Server Dashboard (administrator access required) to view global alerts about  
your server.  
Select Do not allow Remote Access if you want to deny web access for this user.  
9. Click Create Account.  
10. Click Close. Provide the user with their new user name and password.  
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Performing Dashboard Tasks  
The Administrator uses the Dashboard to perform administrative tasks such as creating user  
accounts, setting up access privileges to shared folders and other server resources,  
managing shared folders, and monitoring the WD Sentinel server.  
For information about an additional task, backing up a computer to the WD Sentinel server,  
see “Backing up (Windows PC)” on page 58.  
Using the Home Page  
The main part of the Home page lists some of the recommended tasks to perform the first  
time you sign in to the Dashboard. To perform these tasks from the Home page, just click  
the relevant links. The panel on the right offers easy access to the WD Sentinel RX4100  
community and to WD resources. The rest of this chapter discusses the tasks the  
Administrator can perform on the Dashboard.  
Important: Ensure that you perform the tasks outlined on the Home tab Getting Started  
Tasks prior to performing other tasks.  
For a full description of the typical components of a page, including the Critical, Warning,  
and Informational Alert icons, see the Microsoft Online Help.  
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Home Page Tabs  
The Home page contains four tabs, summarized below:  
Tab  
Description  
Complete basic tasks that will get you started with the  
WD Sentinel server. For information about these tasks, see  
the Microsoft Online Help.  
Home  
Best Practices:  
•
Complete the Getting Started tasks on the Home page of  
the Dashboard.  
•
Create at least one active user account the first  
time you access the Dashboard.  
WD Guardian Services  
Western Digital offers WD Guardian Services for Small  
Business customers. Choose from various technical support  
plans and extended warranty services that work best for your  
business. For more information, visit www.wdguardian.com.  
About  
Displays basic information such as product serial number, IP  
address, and software version.  
Registration  
Allows you to register your server with WD. Once registered  
you will receive notifications of product and firmware  
updates, newsletter, information about new product, and  
services as well as periodic special offers from WD.  
Enter the required information and click Register. Optionally,  
enter the Partner ID of the WD Partner who helped you  
purchase or install your WD Sentinel server.  
Home Page Tasks Panel  
The panel on the right of the Home page displays links to useful WD websites and resources  
to make the best of your WD Sentinel server.  
Managing User Accounts  
On the navigation bar, click the Users icon. You can now:  
View, add, manage, delete, and activate/deactivate user accounts.  
Use the guest account.  
Manage domain user accounts (if joined to an Active Directory Domain).  
Manage passwords.  
Manage Remote Web Access.  
Assign user access privileges to shared folders and server resources.  
For detailed instructions on performing any of these tasks, consult Microsoft Online Help.  
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Managing Computers and Backups  
After you’ve connect your computers to the Windows Storage Server 2008 R2 Essentials  
network, you can manage the computers from a central location in the Computers and  
Backup section of the Dashboard including:  
Viewing a list of computers connected to your server.  
Viewing computer properties and health alerts for each connected computer.  
Setting up and managing computer backups.  
Restoring files and folders to computers.  
Manage backup schedule for automatic Windows client backup.  
Manage Retention policy for the Windows client backup data.  
For detailed instructions on performing any of these tasks, consult Microsoft Online Help.  
Managing Server Folders and Hard Drives  
The Server Folders and Hard Drives section contains two tabs:  
The Server tab allows you to view and manage the properties of the shared folders  
on your server including:  
- Managing your company’s shared folders.  
- Accessing shared folders locally or remotely.  
- Uploading or download files locally or remotely.  
The Hard Drives tab allows you to view and check the health of the drives that are  
attached to your server.  
For detailed instructions on performing any of these tasks, consult Microsoft Online Help.  
Monitoring Add-ins  
The Add-ins section of the Windows Storage Server 2008 R2 Essentials Dashboard  
includes tasks that help you view and manage the Add-ins that are installed on the server.  
For detailed instructions on monitoring add-ins, consult Microsoft Online Help.  
Monitoring System Health and Alerts  
The Monitor module of the Dashboard includes tasks that help you view and manage the  
WD Sentinel server storage system. To open the Monitor module, click the Monitor icon on  
the navigation bar. The Monitor module includes two tabs, Health and Software Update,  
and related tasks in the panel on the right.  
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Health Tab  
The Health tab and related tasks enable you to monitor the status of the storage drives,  
RAID configuration, power supplies, temperatures, fans, CPU, and network connections.  
To open the Health tab, click the Monitor icon on the navigation bar:  
Settings  
Description  
Network Health  
Ethernet 1 & 2  
Displays the status (Connected or Not connected) of the server's network  
connection(s). If you use both Ethernet ports and one fails, the other  
takes over, allowing the WD Sentinel server to remains operational over  
the network.  
Storage  
Displays storage information associated with the WD Sentinel server. The  
WD Sentinel server holds up to four of WD’s hard drives optimized for  
quality, reliability and performance and features RAID 5 to enhance  
performance and data protection.  
RAID is an acronym for Redundant Array of Independent Disks. The  
server uses RAID 5, which offers fast performance by striping data across  
all drives. This arrangement protects data by dedicating a quarter of each  
drive to fault tolerance, leaving three quarters of the system capacity  
available for data storage.  
Type: RAID level  
Total Capacity: Maximum amount of storage space (TB) available.  
Available Capacity: Amount of storage (TB) left available for use.  
Alert Threshold: The percentage of storage capacity used above which  
you receive alert notifications that the storage is approaching maximum  
threshold.  
Status: The status of the server storage may be:  
•
•
Healthy–All drives are in the optimal state.  
Degraded–A single drive failed; data is protected, but  
performance is degraded. (A failed drive must be replaced with a  
healthy drive as soon as possible to fully protect your server and  
data.)  
Status of drives 1-4: The status of a drive may be:  
•
•
•
Normal  
Failed!: Visit WD Store to replace.  
CAUTION: Imminent failure detected. Please replace this hard  
drive immediately.  
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Settings  
Description  
System Temperature  
Enclosure: The temperature within the server enclosure.  
CPUs 1 & 2: The status, temperature, and status description for each  
CPU. (The server does not have two physical CPUs but instead uses a  
dual core CPU. CPU 1 and CPU 2 represent the details for each core.)  
The status may be:  
•
•
•
Normal  
Warm  
Hot  
Cooling Fans  
The status of the server’s cooling fan may be:  
•
•
Active  
Inactive  
Indicates the speed of revolutions in RPMs.  
Power Supplies  
1 & 2  
The server has two power supplies. If you use both and one fails, the  
other takes over and the WD Sentinel server remains operational. The  
status may be:  
•
•
Active  
Inactive  
Health Tasks  
Find compatible hard drives  
To view a list of WD drives that can be used in the WD Sentinel server:  
1. Click Compatible Hard Drives in the Task pane. A pop-up screen lists each drive with  
its model number, description, and maximum capacity.  
2. If desired, click the WD Store button to view or buy additional drives.  
3. To exit, click OK.  
Request Support  
The Request Support function collects information about your WD Sentinel and sends a  
diagnostic report to the WD Support server. It then opens the WD Support website, where  
you can enter a few details regarding the problem to route it to the appropriate support  
team.  
Note: If you do not want to submit the diagnostic logs, use the regular  
WD Support page at http://support.wd.com.  
To access WD Customer Support automatically:  
1. Click Request Support in the Tasks pane. The Request Support window displays.  
2. After reading the information on the screen, click the “I agree and would like to proceed.”  
checkbox, then click Proceed. The WD Support Ask a Question page displays.  
Note: The first time you do this, an Internet Explorer Security Screen displays. Clear  
the check box and click Close.  
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3. Complete the online form and click Submit Question. A diagnostic report of the  
WD Sentinel server is automatically attaches to the form. Your request is added to the  
WD Support queue and assigned a confirmation number. You will receive an email from  
WD Support regarding your question.  
Important: For faster service/phone service, call WD Support. For the latest phone  
numbers and contact information in your region, see “Contacting WD  
Technical Support” on page iii or http://support.wd.com. Have your  
confirmation ready when you call.  
Lock/Unlock  
For security reasons, you can lock or unlock the drives. You cannot lock or unlock an  
individual drive; you either lock them all or unlock them all, using a password you create  
here. This password may be but does not have to be the same as the WD Sentinel server  
Administrator password.  
Important: Store your password in a secure place. If the password is lost, there is no way  
to get it back or unlock the drives, and all of its data may be lost.  
To lock the drives:  
1. In the Advanced tasks area, click Lock drives. The following screen displays:  
2. Read the message, then click the checkbox.  
3. Click Next.  
4. In the Set Password field, enter your password.  
5. In the Confirm Password field, confirm your password,  
6. In the Password Hint field, enter a hint to remind you of the password.  
7. Click Next.  
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To unlock drives:  
1. Click Unlock drives.  
2. In the Old Password field, enter your password.  
3. Click Unlock drives.  
To change the password:  
1. Click Unlock drives.  
2. In the Old Password field, enter the current password.  
3. In the New Password field, enter your new Password.  
4. In the Confirm Password field, confirm your new password  
5. In the Password Hint field, enter a hint to remind you of the password.  
6. Click OK.  
Updating Software  
Periodically, WD issues software updates for your WD Sentinel RX4100 server. The Software  
Update tab within the Monitor module allows you to update WD Sentinel RX4100 software  
automatically or manually. Please note that this tab only allows you to apply software  
updates issued by WD. To manage or apply Microsoft software updates, go to Server  
Settings on the Dashboard.  
A best practice to ensure that your system software stays current is to enable automatic  
updates on your WD Sentinel server (see “Automatic Updates of WD Software” on page 43)  
Manual Updates of WD Software  
To check for software updates and update the software:  
1. Click the Software Updates tab.  
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2. You have two options. You may check for updates online or update from a file:  
To use the online update:  
a. Click Check for Updates.  
b. If an update is available, click Download and Install to update your  
WD Sentinel server.  
To update from a file:  
a. The software update files can also be downloaded from the WD Support site at  
http://support.wd.com. Once you download the available firmware updates for the  
WD Sentinel RX4100 server, copy the file to a shared folder such as the Documents  
share on the server and select the file to update.  
b. Click Update from file and then locate and select the update file you copied to your  
server.  
c. Click Open. The system applies the software update. The system automatically  
restarts the server if a reboot is required to complete the software update.  
Setting Global Alerts  
In order to receive alerts about your system and to be notified of software updates, it is  
necessary that you set up global alerts for your WD Sentinel server. Use the following steps  
to set up your global alerts.  
1. Open the Launchpad (see “Accessing the Launchpad” on page 49).  
2. Click the menu arrow on the top right and select Settings from the drop-down menu.  
3. Under Scope of alerts to be presented, select Local and Network.  
4. Click Apply, then click OK.  
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Setting Email Alerts  
Receiving your alerts by email allows you to monitor certain server issues as they occur. Use  
the following steps to set up email alerts.  
1. On the Dashboard Home Page, click the Alert Viewer.  
2. Click Set up email notification for alerts at the bottom of the Alert Viewer.  
3. Click Enable.  
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4. Review the settings, then click OK.  
5. Enter the email address where you’d like to receive the server alerts.  
6. Click Apply and send email to ensure that email alert is working.  
7. Click Close.  
8. Click OK. Your email alert is now set up.  
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Automatic Updates of WD Software  
Enabling Automatic Updates on your WD Sentinel server causes the server to check  
for available software updates from WD on a scheduled basis and apply the updates  
automatically.  
To set a schedule for automatic updates:  
1. In the Automatic Updates section, click Enable.  
2. Click the Change link and select the day and time you want the WD Sentinel server to  
check for updates every week, and if an update is available, install it. (Example: every  
Sunday at 3:00 AM)  
3. Click Apply.  
Updating Microsoft Software  
You can update the Microsoft software for the WD Sentinel RX4100 using the Server  
Settings page. See “Managing Server Settings,” below.  
Managing Server Settings  
Important: Unless otherwise noted, Microsoft Online Help provides complete instructions  
for using these pages.  
1. Click Server Settings on the icon bar to enable, set up, and control WD Sentinel server  
settings.  
2. The General page displays. The left panel contains links to the rest of the Server Settings  
pages.  
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Following is a summary of the purpose of each of the Server Settings pages.  
General  
Shutdown or restart the server—This is the safest method to shut down or  
restart the server. It insures that the RAID system shuts down cleanly. See “Shutting  
Down the Server” on page 45 for instructions.  
Change the date, time, and location of the server—You can change the  
settings you established at initialization.  
Change the behavior of the Windows update—You can change the settings for  
updating the Microsoft software.  
Media  
Enable or disable media (DLNA) services, set the video streaming quality, and define the  
folders to be used for the media. By default, media service is enabled, and the default  
Picture, Music, and Video folders are set to distribute the media.  
HomeGroup  
When creating a HomeGroup, establish which folders are to be shared through the  
HomeGroup. Note that HomeGroup is only available for Windows 7 clients.  
Remote Web Access  
With Remote Web Access enabled, you can access the WD Sentinel server from any device  
using a web browser, such as Internet Explorer, from anywhere with Internet access. You  
can access shared folders and files (that you have permission for) on the server as well as on  
your networked computer.  
Enabling Remote Web Access  
Enable or disable Remote Web Access on the Server Settings page. Remote Web Access is  
turned off by default.  
Note: The Home page provides a Getting Started task for enabling Remote Web  
Access by clicking link to the process.  
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1. Under Server Settings, click Remote Web Access in the panel on the left.  
2. Click Turn on and complete the wizard to set up your router, set a domain name, and  
change Internet settings.  
3. Grant Remote Web Access privileges if you want a user to access the  
WD Sentinel server, shared folders, computers, media, Home page links, and the  
Dashboard (administrators only) when you create or update a user account.  
To view a user’s current privileges, click the Users icon in the Navigation bar.  
Note: The Guest account cannot have Remote Web Access.  
Note: Refer to Microsoft Online Help for detailed information about setting up  
remote web access and for troubleshooting connection issues.  
Domain  
This option is available for networks that have an Active Domain server for user control. A  
domain is a group of computers under the control of a server known as the domain  
controller. In the case of the WD Sentinel RX4100, it enhances security by allowing only  
users with necessary permissions to access the server. Refer to Microsoft Online Help for  
detailed information. For information on acceptable domains, go to http://support.wd.com  
and search for Knowledge Base Answer ID 8549.  
Shutting Down the Server  
The WD Sentinel server is intended to be on at all times, providing shared data and backup  
services. A best practice is to avoid turning the unit off. However, if it does become  
necessary (for example, moving the server to a different location), then follow the procedures  
below.  
It is very important that the WD Sentinel server be shut down or restarted in a clean and  
graceful manner through the Server Settings section in the Dashboard.  
WARNING! To avoid a potentially unclean shutdown that could corrupt the RAID  
configuration, shut down the server through the Dashboard.  
To shut down or restart using the Dashboard (Preferred method):  
1. Click Server Settings in the icon bar.  
2. To shut down, right-click the red button in the lower left corner of the page and select  
Shut down.  
3. To restart, right-click the arrow and select Restart.  
4. When the confirmation message appears, click Yes.  
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Managing Storage on the WD Sentinel Server  
5
WD Sentinel Server RAID Storage  
Using USB Storage  
WD Sentinel Server RAID Storage  
RAID is the acronym for Redundant Array of Independent Disks. The WD Sentinel server  
provides automatic RAID service to assure the integrity of the storage system. For  
redundancy, a minimum of two drives must be active. The operating system and all data are  
protected by the RAID structure. The server automates the management of the RAID.  
Your WD Sentinel server uses RAID 5, which offers fast performance by striping data across  
all drives, This RAID level provides the system with both redundancy and optimum capacity.  
2 TB Drives  
3 TB Drives  
4 TB Drives  
RAID Level 5 (4 Drives)  
8 TB Capacity  
12 TB Capacity 16 TB Capacity  
If a drive in the array fails, the data and operating system are still intact, and the  
WD Sentinel server continues to provide service.  
Important: If you have one bad drive, the server operates normally. However, if a  
second drive fails, the server will no longer operate. You will need to  
recover the server and/or replace the failed drive(s). A best practice is  
to have a replacement drive readily available.  
The WD Sentinel server lets you know when a drive fails in the following ways:  
The LED below the bad drive is solid red.  
The Power LED on the WD Sentinel server flashes red, indicating a serious fault.  
An email Alert is posted if you have set it up to do so. (See “Monitoring System  
Health and Alerts” on page 35.)  
To recover from a failed drive, simply replace the drive (the one with the red LED over the  
drive) with an approved drive for the WD Sentinel server (see “Find compatible hard drives”  
on page 37). The WD Sentinel server validates the replaced drive and automatically  
integrates it into the RAID array. This operation takes many hours to accomplish. Progress of  
this operation appears on the Dashboard. It is not necessary to power off or disengage the  
WD Sentinel server to perform this operation. While the server is verifying the RAID array,  
your data continues to be available although the performance may be impacted.  
The WD Sentinel server RAID system has no downgrade options. Once available capacity  
has been increased, the Administrator cannot decide to subsequently reduce capacity by  
removing a drive. The removal of a drive degrades the RAID and makes it vulnerable to  
single drive failure.  
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Using USB Storage  
The WD Sentinel server has one USB 2.0 port on the front panel and two USB 3.0 ports on  
the back panel of the unit. The USB 3.0 ports can connect to external USB 2.0 or USB 3.0  
storage devices or to a UPS device for power outage conditions. For example, WD My  
Passport or WD My Passport Essentials may be used to connect to the WD Sentinel server.  
You can share this data on your USB drive with other users connected to the server by using  
the Dashboard, which treats the USB drive as a share. You can set user privileges just as  
you do with shared folders on the WD Sentinel server’s drives. The server manages UPS  
capability through a USB port for communication and to ensure an orderly shut down.  
Front View  
USB 2.0 port  
Back View  
USB 3.0 ports  
To share data on a USB drive:  
1. Connect a USB drive to either of the three USB ports.  
2. On the Dashboard, click the Servers Folders and Hard Drives icon.  
3. Click the Server Folders tab.  
4. In the Task bar, click Add a folder.  
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5. Enter a name for the folder.  
6. Click Browse and select a folder on the USB drive. Note that a shared folder cannot be  
created at the root of the USB drive.  
7. Click OK and follow the instructions on the screen.  
To stop sharing data on a USB drive:  
1. On the Dashboard, click the Servers Folders and Hard Drives icon.  
2. Click the Server Folders tab, then select the folder you want to stop sharing.  
3. On the Task bar, click Stop sharing the folder.  
4. Click Yes, then click Close.  
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Using the WD Sentinel Server’s Features  
6
Using the Launchpad (Internal Users)  
Accessing Shared Folders Over Your Network  
Accessing Computers and Shared Folders Remotely  
Backing up (Windows PC)  
Backing up with Time Machine (Mac)  
Recovering/Restoring (Windows PC)  
Recovering/Restoring (Mac)  
Backing up your WD Sentinel Server  
Recovering the WD Sentinel Server to Factory Defaults  
This chapter describes the routine tasks that both the Administrator and permitted users  
perform on the WD Sentinel server.  
Using the Launchpad (Internal Users)  
After you, the Administrator, use the Dashboard to set up users with a user name,  
password, and permissions, they can access the Launchpad Sign-in page using one of the  
following methods:  
Best Practice: Ideally, you set up a user name and password for yourself and have  
given it all access privileges so you too can use the Launchpad  
shortcuts.  
Accessing the Launchpad  
To access the Launchpad (Windows):  
If you’re operating systems Do one of the following...  
is...  
Windows 8  
From Apps Page:  
•
•
•
•
On your keyboard, click the Windows button  
.
On the Metro Start page, right-click in a blank area of the screen.  
Select All apps  
.
Under Windows Server Storage Server 2000 R2, click Windows  
Server 2008 R2 Launchpad.  
From Desktop:  
•
Double-click the Launchpad icon  
.
From System Tray:  
•
Right-click the Launchpad icon  
Launchpad.  
and select Open  
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If you’re operating systems Do one of the following...  
is...  
Windows 7  
Windows Vista  
From Start Menu:  
Click >All Programs >Windows Storage Server 2008  
R2>Windows Storage Server 2008 R2 Launchpad.  
From Desktop:  
•
•
Double-click the Launchpad icon  
.
From System Tray:  
•
Right-click the Launchpad icon  
Launchpad.  
and select Open  
Windows XP  
From Start Menu:  
•
Click Start>Programs>Windows Storage Server 2008  
R2>Windows Storage Server 2008 R2 Launchpad.  
From Desktop:  
•
Double-click the Launchpad icon  
.
From System Tray:  
•
Right-click the Launchpad icon  
Launchpad.  
and select Open  
1. Enter your user name and password.  
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2. Click the right arrow to display the Launchpad, which lists four tasks that authorized  
users can perform: Backup, Remote Web Access, Shared Folders and Dashboard.  
Note: The Dashboard option is only useful to a user with Administrative privileges  
and knowledge of the Administrator password.  
To access the Launchpad (Mac):  
1. Do one of the following:  
Double-click the Launchpad icon on your Mac Toolbar.  
Select Finder>Applications>Windows Server Launchpad  
Once you’ve accessed the LaunchPad Sign In screen, use the following steps to sign in and  
use the Launchpad.  
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1. Enter your user name and password.  
2. Click the arrow to display the Launchpad. It lists four tasks: Backup, Remote Web  
Access, Shared Folders, and Add-ins.  
Selecting Launchpad Options (Windows PC or Mac Computer)  
To select Launchpad options:  
IF you want to . . .  
THEN . . .  
AND ...  
Back up your Windows PC  
to the WD Sentinel server  
manually  
Click Backup.  
Continue to “Backing up (Windows  
PC)” on page 58.  
Back up your Mac to the  
WD Sentinel Server using  
Time Machine  
Click Backup.  
Continue to “Backing up with Time  
Machine (Mac)” on page 61.  
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IF you want to . . .  
THEN . . .  
AND ...  
Use Remote Web Access:  
Click Remote Web  
Access.  
Continue to “Remote Web Access” on  
page 44 and “Accessing Computers  
and Shared Folders Remotely” on  
page 57.  
•
Enable remote web  
access for users with  
Remote Access  
Privileges  
•
•
Access the server from  
a remote location (all  
users)  
Change a user  
password (by the user)  
Access shared folders on  
the server  
Click Shared  
Folders.  
Continue to “Accessing Shared Folders  
Over Your Network” on page 56.  
Manage the server  
(Windows PCs and  
Administrators only)  
Click Dashboard.  
Enter the Administrator password and  
continue to “Managing the WD Sentinel  
Server (Dashboard)” on page 28.  
Manage the server (Mac  
and Administrators only)  
Click Add In, then  
click Dashboard.  
Enter User Name (Administrator) and  
Password (the password you created  
at setup), then continue to“Managing  
the WD Sentinel Server (Dashboard)”  
on page 28.  
Managing the Launchpad  
To disable the Launchpad after signing in (Windows):  
1. Sign in to the Launchpad.  
2. Click the menu arrow at the top right and select Settings from the drop-down menu.  
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3. Clear the Automatically run the Launchpad when I log on to Windows check box,  
and click OK.  
Note: You can also change the type of alerts that display on the Launchpad and  
select whether to allow Microsoft to send you information about it in this  
window.  
To disable the Launchpad after signing in (Mac):  
1. Sign in to the Launchpad.  
2. Click the menu arrow at the top right and select Settings from the drop-down menu.  
3. Clear the Automatically run Windows Server Launchpad when I log in check box,  
and click the Close button  
.
You can also change the type of alerts that display on the Launchpad selecting whether to allow  
Microsoft to send you information about it in this window, and setup your Time Machine backups.  
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To uninstall the Launchpad (Connector Software) on a Windows PC:  
Note: When you uninstall Launchpad, you also uninstall Dashboard. They can not  
be uninstalled separately.  
If you’re operating systems Then...  
is...  
Windows 8  
•
•
•
•
On your keyboard, click the Windows button  
On the Metro Start page, right-click in a blank area of the screen.  
Select All apps  
.
.
Under Windows Server Storage Server 2000 R2, right-click Windows  
Server 2008 R2 Launchpad.  
•
Select Uninstall  
.
Windows 7  
Windows Vista  
Windows XP  
•
•
•
•
•
Click >Control Panel (Windows 7/Vista).  
Click Start>Control Panel (Windows XP).  
Click Uninstall a Program.  
From the list, select Windows Storage Server 2008 R2 Connector.  
Click Uninstall.  
- If the User Account Control window displays, click Allow.  
- If the Windows Storage Server 2008 R2 Essentials Connector  
page displays suggesting that you close the Launchpad, click OK.  
Note: You must reboot the computer before installing another  
Connector.  
To uninstall the Launchpad (Connector Software) on a Mac:  
You must uninstall Launchpad from three Macintosh® HD folders: Users, Applications, and  
Library.  
1. Quit the Launchpad.  
2. In the Finder pane, click Applications. Drag and drop Windows Server Launchpad  
into the Trash icon. The Launchpad icon no longer appears in the dock.  
3. Click Finder>Devices>Macintosh HD.  
4. Click Library>Application Support>Microsoft. Drag and drop Launchpad into the  
Trash icon.  
5. Click Library>Preferences. Drag and drop “com.microsoft.launchpad.plist” into the  
Trash icon.  
6. Right-click the Trash icon and select  
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Accessing Shared Folders Over Your Network  
Launchpad (Windows)  
1. On the Launchpad, click Shared Folders. A set of folders similar to the one below  
displays:  
2. Double-click a folder to open it, then click the file you want to access. Your access (as a  
general user) depends on the permissions assigned to you by the Administrator.  
Launchpad (Mac)  
1. On the Launchpad, click Shared Folders.  
2. Select the shared folder you’d like to mount on your Mac, then click OK.  
If all shared folders are mounted on your Mac, click Cancel, then open Finder. Click  
the IP Address of your WD Sentinel under Shared to display your Shared Folders.  
3. The selected shared folder displays on your desktop.  
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Accessing Computers and Shared Folders Remotely  
This section assumes that the Administrator has completed the setup and configuration for  
Remote Web Access through the Dashboard.  
You can access files stored on the WD Sentinel RX4100 anywhere, as long as you have  
access to the Internet.  
Note: You must use Internet Explorer 8 or 9 to access a PC using the Remote Web  
Access feature. See “Specific Problems and Corrective Actions” on page 83.  
Logging In  
1. On the Launchpad, click Remote Web Access or on a web browser, enter the domain  
address for your WD Sentinel server. This is the domain address the Administrator  
configured while setting up Remote Web Access on your WD Sentinel server. The  
following web page displays in your browser.  
2. Enter your WD Sentinel server user name and password, then click the arrow to display  
the Remote Web Access: Home for User window:  
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Remote Web Access Home Page  
The Remote window includes the following sections:  
Note: You can also use the navigation links at the top of the window to view these  
sections.  
Computers  
Note: Connecting to computers or the WD Sentinel server using Remote Web  
Access requires the Internet Explorer browser.  
Click Connect to connect to your WD Sentinel server or to a computer on your  
network.  
-
If the Internet Explorer you are using does not have Active X Client, click OK to  
install it, then complete the wizard.  
Shared Folders  
Access shared folders on the WD Sentinel server. The folders may include Documents,  
Pictures, Music, Video, Recorded TV, and any additional shared folders the Administrator  
may create using the Dashboard. A user with "Read & Write" access to a particular shared  
folder is able to modify the contents of the existing files, upload new files, or delete files from  
the folder.  
Note: Only the folders for which the user has permissions are displayed under  
Shared Folders on Remote Web Access.  
Media Library  
Browse through your pictures, music, videos, and recorded videos. The WD Sentinel server  
automatically discovers the media files and adds them to your media library. The built-in  
media capabilities allow you to view your pictures in a slideshow, steam digital music, or  
stream videos over the web.  
Backing up (Windows PC)  
The WD Sentinel server backup is based upon block level de-duplication, a process that  
backs up data without unnecessarily backing up the same data more than once. This  
powerful process uses less network traffic for execution, provides a full back-up at each  
backup time (although it behaves as if it is incremental), and by executing de-duplication  
across all client computers, the storage capacity requirements are significantly reduced.  
Backup becomes an automatic process for a computer once you install Connector software  
on it. With Connector software installed, all volumes and all NTFS data on that computer are  
backed up.  
Note: For information on backing up your Mac using Time Machine, See “Backing up with  
Time Machine (Mac)” on page 61.  
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Scheduling Automatic Backups (Dashboard only)  
To set a schedule for future backups:  
1. Access the Dashboard.  
2. Click the Computers and Backups icon on the navigation bar to display a list of  
computers and servers on your network:  
3. Click Additional client computer backup tasks in the task panel.  
4. Enter the Start time and End time for daily backups and click OK.  
Initiating Backups  
By default, backups are performed at night for up to 25 client computers in a sequential  
order. If the client computer is asleep or hibernating at that time, the backup software can be  
enabled to wake up the client computer, back it up, and put it back to sleep.  
You may start a backup either through the Launchpad on the computer being backed up  
or through the Dashboard.  
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Backup Using the Launchpad  
Note: For information on accessing the Launchpad, see “Using the Launchpad  
(Internal Users)” on page 49).  
1. On the Launchpad, click Backup. The Backup Properties page displays:  
2. Click Start backup.  
3. Enter a name for the backup and click OK:  
The Backup Properties page re-displays and tracks the progress of the backup.  
Note: If you want the computer to automatically wake up for scheduled backups,  
select the check box.  
4. Click OK to apply the change, close the page, and return to the Launchpad while the  
backup continues.  
The message that the backup was successful displays on the page and on the  
Dashboard. For more information about the backup process, see Microsoft Online Help.  
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Backup Using the Dashboard  
1. Click the Computers and Backups icon on the navigation bar to display a list of  
computers and servers on your network:  
2. Select the computer you want to back up.  
3. Click Start a Backup for the Computer in the Task pane. For further instructions, see  
Microsoft Online Help.  
Backing up with Time Machine (Mac)  
For Mac users, Time Machine allows you to backup data to your WD Sentinel server. Time  
Machine automatically backs up your entire Mac, including system files, applications,  
accounts, preferences, email messages, music, photos, movies, and documents.  
Note: Time Machine keeps hourly backups for the past 24 hours, daily backups for the  
past month, and weekly backups until your backup drive is full.  
To take advantage of the Time Machine backup capabilities, you must install the server  
connector software on your Mac (see “Connecting a Mac” on page 23) and create a user  
account within the WD Sentinel server (see “Adding a User Account” on page 31).  
Note: Your Mac must be connect to the same network as your WD Sentinel server.  
For additional information on Time Machine, consult your Mac OS documentation.  
Note: For information on backing up your PC, See “Backing up (Windows PC)” on  
page 58.  
Scheduling Automatic Backups (Time Machine)  
To set up and schedule Time Machine to back up files to your WD Sentinel server:  
1. Use one of the following methods to open Time Machine.  
Click the Time Machine icon in the Dock:  
Click the Apple menu  
Click Go > Applications and select Time Machine.  
> System Preferences and select Time Machine.  
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2. If this is your first time creating a backup, the following screen displays:  
3. Click Set Up Time Machine to display the Time Machine Preferences screen:  
4. Click Select Disk and select the WD Sentinel server for your backups.  
5. Click Use Backup Disk. A screen prompts for your user name and password.  
6. Enter the user name and password of an account that has administrator permissions on  
this client computer, then click OK.  
7. Select Registered User.  
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8. Enter your assigned WD Sentinel User Name and Password in the Name and Password  
fields:  
9. Click Connect. The Preferences screen returns.  
10. To start automatic backups, move the slider to ON.  
Time Machine begins backing up your files. The first backup may take some time, but  
subsequent backups are faster because Time Machine only backs up new or changed  
items.  
Time Machine backs up your computer every hour and keeps the following backup sets:  
Every hour for 24 hours  
Every day for the past month  
Weekly until the WD Sentinel drive is full.  
Note: If a backup is interrupted, for example, if the computer goes into sleep mode,  
it will resume automatically once the computer is available.  
To see information such as available capacity and the date and time of the oldest, latest, and  
next backup, select Open Time Machine Preferences on the Time Machine drop-down  
menu:  
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Recovering/Restoring (Windows PC)  
The WD Sentinel server provides two options for recovering lost or corrupted data:  
Restore a Computer—Restores all data and settings of a Windows PC computer  
or a storage device connected to the WD Sentinel server.  
Recover File/Folders —Recovers individual files or folders.  
Note: For information on recovering/restoring data on your Mac using Time Machine, See  
“Recovering/Restoring (Mac)” on page 65.  
Restoring Windows PC Computers (Bare Metal Restore)  
This feature restores a Windows PC connected to your WD Sentinel server. Should your  
computer experience an unfavorable event such as a hard drive crash, the Recovery feature  
reinstalls the operating system, software applications, and all the data. This type of recovery  
is known as a bare-metal restore; it recovers everything that was on the computer when it  
was backed up.  
Best Practice: You may need some network drivers. Save them to a USB flash  
drive.  
To restore a Windows PC that has been backed up:  
1. Click Computers and Backups  
on the navigation bar.  
2. Select the computer that was backed up.  
3. Insert a USB flash device into one of the WD Sentinel server’s USB ports.  
4. In the panel on the right, click Additional Client Computer Backup Tasks and then  
Tools:  
5. Click Create key... to generate a bootable USB flash key (configuration file) on the  
connected USB flash drive. You will use the key to boot the PC and download the  
backed-up system. Follow the wizard to complete the process.  
6. Remove the USB flash drive from the WD Sentinel server and connect it to the computer  
you want to restore.  
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7. Boot the Windows PC from the USB flash drive:  
a. Start the computer.  
b. Depending on your computer, press F12 or another key that displays boot options.  
c. From the Boot menu, select USB Device.  
d. On the Windows Boot Manager, select a Windows operating system for a full-system restore.  
The Full System Restore wizard Welcome screen displays.  
-
If a message indicates that you do not have the correct network card driver,  
insert the USB flash drive with the driver into another USB port on the Windows  
PC, and follow the steps in the wizard to restore the computer.  
-
If you do have the correct driver, click Continue and complete the steps in the  
wizard to restore the computer.  
Note: Refer to Microsoft Online Help for additional information.  
To recover individual files and folders:  
1. Click the Computers and Backups icon and select the computer from which you  
would like to recover the backup files.  
2. In the Task panel, click Restore Files or Folders for the Computer. The server  
displays a list of your backups.  
3. Select the backup that has the files and folders you want to restore and click Next.  
4. Follow the wizard to select the files and folders and recover them to your computer. See  
Microsoft Online Help for additional information.  
Recovering/Restoring (Mac)  
Time Machine allows you to restore files, versions of files, or your entire system. For  
additional information on recovering or restoring your system files, consult your  
Apple documentation.  
Note: For information on recovering/restoring data on your PC, See “Recovering/Restoring  
(Windows PC)” on page 64.  
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1. On the Launchpad, click Backup. Your Time Machine backups display.  
2. Select the date you’d like to restore to from the time line on the right of the screen.  
3. Click Restore in the bottom right-hand side of your screen.  
Backing up your WD Sentinel Server  
Backing up your WD Sentinel server allows you to protect your operating system, system  
state, volumes, files, and application data. For information on how to back up your  
WD Sentinel server, see Microsoft Online Help/Backing Up your Server.  
Recovering the WD Sentinel Server to Factory Defaults  
This feature recovers your WD Sentinel server, a process that may be necessary in case the  
server has a virus that cannot be deleted, bad or corrupted server configuration settings  
prevent you from starting the server, or the system drive(s) failed.  
Best Practice: You may lose some of your data, depending on the type of recovery you  
perform.  
Requirements  
Virtual DVD software  
Note: Free virtual DVD software is available on the internet. See “Create a Virtual  
DVD” on page 67.  
2.0 USB flash drive, 16 GB - 32 GB  
Windows PC  
DVD burner or DVD emulation software  
Note: Free DVD emulation software is available on the Internet. For more information  
on emulation software, see Knowledge Base Answer ID 8561.  
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Create a Virtual DVD  
WARNING! WD does not assist in the installation of third party programs such as  
a Virtual DVD. The information provided below is to assist customers  
with the creation of a recovery disk for a WD Sentinel RX4100.  
Western Digital is not responsible for any damage to your computer  
or data resulting from using third party software.  
1. Download the Server Recovery ISO file and save it to a preferred location on your  
computer.  
2. Download and install a virtual DVD software program. Available virtual DVD programs  
include:  
PowerISO (http://www.poweriso.com/)  
Virtual CloneDrive (http://www.slysoft.com)  
3. Following your third-party software instructions, mount the Server Recovery ISO to a  
virtual DVD.  
Run the Virtual DVD  
1. Mount the Recovery DVD into your computer following the instructions for your virtual  
DVD software.  
If you are running Windows 8, Windows 7, Windows Vista, click Run Setup.exe on  
the window that displays:  
If you are running on a Windows XP computer, by clicking Setup.exe under My  
Computer.  
2. After the application runs, a Server Recovery Utility window appears with three options:  
Unlock my drives  
Recreate my storage  
Perform a recovery  
These options are explained below.  
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Unlock my drives  
Unlock my drives unlocks the WD Sentinel server’s drives if they are locked. (See “Lock/  
Unlock” on page 38.) Before starting any recovery process, unlock the drives with an unlock  
key.  
To create an unlock key:  
1. On the Server Recovery Utilities window, click Unlock my drives.  
2. Click Next and enter the password previously set to lock the drives. Keep in mind that  
this password is not the WD Sentinel server’s Administrator password. It is the locked  
drives password (see “Lock/Unlock” on page 38). If the Administrator password was  
used to lock the drives, enter it here. or123  
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3. Insert the USB flash drive into the Windows PC USB port. The USB flash drive should  
appear in the Select USB flash drive drop-down list.  
4. If the USB flash drive is not on the list, click Refresh and search for it.  
5. After locating the USB flash drive, click the “I understand...” check box to indicate that  
you know the process will delete all files and folders on your USB flash drive.  
6. Click Next to display the “Congratulations and Next Steps” page.  
7. Follow the steps listed on this page:  
a. Shut down the WD Sentinel server.  
b. Insert the USB flash drive into one of the server’s USB ports.  
c. Restart your server while holding the recovery button on the back of the unit.  
Note: This may require 2 people to perform.  
d. Allow the recovery process to complete.  
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Recreating the storage  
The “Recreate my storage” option recreates the storage partition and RAID for your  
WD Sentinel server.  
WARNING! Only use this option if you are replacing all drives or if the partition or  
RAID is corrupted. This option may delete user data.  
1. On the Server Recovery Utilities page, click Recreate my storage.  
2. Read the caution, then click the “I understand...” check box to indicate you know the  
process may erase the data on the WD Sentinel server’s drives while it recreates the  
server’s configuration..  
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3. Insert the USB flash drive into the USB port of the Windows PC, and click Next to  
display the following page for using the USB key:  
4. The USB flash drive should appear in the Select USB flash drive drop-down list. If the  
USB flash drive is not on the list, click Refresh and search for it.  
5. After locating the USB flash drive, click the check box acknowledging that you know that  
when you click Next, all files and folders on the USB flash drive will be deleted.  
6. Click Next. A progress bar displays while the USB flash drive is being prepared.  
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7. Upon completion of the process, the Recreate Storage page displays:  
8. Follow the instructions under Next Steps:  
a. Shut down the WD Sentinel server.  
b. Insert the USB flash drive into one of the server’s USB ports.  
c. Restart your server while pressing and holding the Recovery button on the back of the  
server.  
Note: This may require 2 people to perform.  
d. Continue to hold the Recovery button until the “Windows loading files” screen appears.  
Release the Recovery button.  
e. Allow the recovery process to complete.  
Performing a Recovery  
This option enables the Administrator to restore the server to factory defaults with or without  
deleting all contents stored on the WD Sentinel server.  
1. On the Server Recovery Utilities window, click Perform a recovery:  
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2. Click Next. The Getting Started page displays:  
3. Read the information on the screen.  
If you have previously created a bootable recovery USB flash drive, click the Skip  
creating the bootable USB flash drive check box and continue to Step 9.  
Click Next. The Create a bootable USB flash drive for server recovery screen displays:  
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4. Insert the USB flash drive into the USB port of the Windows PC, and click Next.  
The Prepare the USB flash drive for server recovery screen displays.  
5. Your USB flash drive should appear in the Select USB flash drive drop-down list. If it is  
not on the list, click Refresh and search for it.  
6. After locating the USB drive, click the check box to acknowledge that you know clicking  
Next will delete all files and folders on the USB flash drive.  
7. Click Next. The Preparing the USB flash drive for server recovery screen displays.  
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8. The recovery application on the DVD prepares the USB drive. This process can take up  
to 15 minutes to complete.  
After the USB drive preparation is done, the Start your server in recovery mode screen  
displays.  
9. Follow the additional instructions that appear on the screen to guide you through the  
recovery process:  
a. Shut down the WD Sentinel server.  
b. Connect a monitor to the server if one is not already connected.  
c. Insert the USB flash drive into one of the server's USB ports.  
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d. Restart your server while pressing and holding the Recovery button on the back of the  
server.  
Note: This may require 2 people to perform.  
e. Continue to hold the Recovery button until “WINDOWS IS LOADING FILES,” then release the  
Recovery button, leaving the USB flash drive connected to the WD Sentinel server.  
The monitor displays “RECOVERY INITIALIZING.”  
f. When the monitor connected to your server displays “RECOVERY STARTED,” return to your  
computer and click Next. This connects the server to your computer.  
10. Click Next.  
11. Select the option you’d like to use to restore your server.  
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If you have a backup for the server, select the first bullet. This is the recommended  
method of recovery.  
If you want to restore the server to its factory default settings, select the second  
bullet.  
Note: This option deletes all settings, user accounts and installed applications.  
12. Click Next.  
13. Select a restore option:.  
Select the first option to reset the server but keep the data on the hard drives.  
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Select the second option to reset the server and delete all data from the internal hard  
drives or external hard drives connected to the eSATA ports. This will not affect hard  
drives connected to the USB ports.  
14. Click the check box at the bottom of the screen indicating that you understand that all  
of your existing settings and installed applications will be reset to factory defaults, then  
click Next.  
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15. Review the information on the screen. If you agree, click Next. The server begins  
recovery.  
WARNING! Various device drivers are installed and will display on the server’s  
monitor during the restoration process. Let the system recovery  
continue without responding to the information on the screen until  
the Set Up Windows Storage Server 2008 R2 Essentials server  
language screen displays.  
Sample system recovery screen  
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Once the recover is complete the following screen displays on your client computer:  
16. Click Close.  
17. In the address field of an open browser window, enter http://WDSENTINEL.  
18. Set up your WD Sentinel RX4100 server using the steps outlined in “Setting up your  
WD Sentinel Server (one time only)” on page 17. For more information, see  
Microsoft Online Help.  
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BEST PRACTICES  
Best Practices  
7
Setting up the WD Sentinel RX4100  
Setting up Client Computers  
Using the WD Sentinel RX4100 Efficiently  
Replacing Drives  
Sharing Files with External Users  
Shutting Down  
The following practices help you use the WD Sentinel RX4100 and protect your data  
efficiently and safely.  
Setting up the WD Sentinel RX4100  
Change the default name of WD Sentinel to something unique. This avoids conflicts  
when another WD Sentinel server is added to your network in the future.  
Make sure Ethernet 1 and Ethernet 2 are on the same network subnet.  
Add the server to your domain. This allows users to use the same login and  
password for both the Launchpad and their computer.  
If you decide to lock the drives, make sure the password is stored in a safe place.  
Set user password policy to at least medium security.  
Enable Microsoft Automatic Updates to find and apply the latest Microsoft software  
update.  
Enable WD Automatic Updates to find and apply the latest WD software update.  
Set up Automatic Alert Notification for real-time notifications of any problems with  
the WD Sentinel server.  
Set up Remote Web Access using Ports 443 and Port 80. If your router or IP  
provider blocks these ports, you may need to consult with your IP provider for  
assistance.  
Do not remove the Windows page file! Some critical functions use the system’s  
paging file. Removing the page file can potentially leave your system unusable with  
the possibility of data loss. To maintain the reliability of your system and its redundant  
resources, do not modify the paging file whatsoever.  
Setting up Client Computers  
Before loading the Connector software to add a computer to the  
WD Sentinel server for backup, be sure that the computer’s operating system is fully  
up-to-date.  
When adding client computers to the WD Sentinel server, it is best not to have any  
backups active.  
Using the WD Sentinel RX4100 Efficiently  
The WD Sentinel server has many jobs to perform. Share data during business  
hours, and back up the computers during hours of inactivity. Keep the server  
powered on 24/7 to do its work.  
To avoid RAID issues, always use Sentinel with a UPS.  
Enable e-mail alerts. Receiving your alerts by email allows you to monitor certain  
server issues as they occur.  
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BEST PRACTICES  
Replacing Drives  
The online removal of a drive forces a rebuild when the drive is replaced. Until the  
rebuild is complete, the RAID system is degraded and unrecoverable failure will  
occur should another drive be removed. Only remove one drive at a time between  
rebuilds.  
Avoid pulling a drive out unless there is a failure.  
When a drive needs replacement, the WD Sentinel server is still functional but  
subject to a second drive failure that would result in the loss of data. To minimize this  
vulnerable time, a good practice is to have another drive ready to replace the failed  
drive.  
Sharing Files with External Users  
Create Employee-Specific Private Folders/Assign Permissions—Depending on the  
nature of your business and organizational structure, you may want to create a  
shared folder for each employee and give the respective employee Read/Write  
permissions for that folder.  
Create Shares for Vendors or Clients/Access Remotely—The built-in Remote Web  
Access feature enables collaboration on files and data not only among your  
employees but also with your clients and vendors.  
As a best practice, create a unique user account for each client and vendor you  
want to exchange data with and create a dedicated Shared Folder for each such  
external user. To prevent giving external users access to your sensitive data, make  
sure that the user accounts you create have the appropriate permissions for only the  
folders you have created for them.  
To start collaborating with your external users, just provide them with the domain  
address of your WD Sentinel server and their user name and password.  
Shutting Down  
Unclean shutdowns are hard on RAIDed systems. The WD Sentinel server  
recognizes an unclean shut down and upon the reapplication of power, begins a  
long sequence of examining the RAID for errors and bringing the RAID configuration  
back into alignment. This sequence can take many hours. To avoid this situation and  
to assure that the unit always experiences clean shutdowns and the best data  
integrity, use an Uninterruptible Power Supply (UPS).  
Note: Performance is affected during a RAID rebuild and verification.  
To avoid possible corruption, do not unplug the power from the unit while it is  
running.  
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TROUBLESHOOTING  
Troubleshooting  
8
First Steps Checklist  
Specific Problems and Corrective Actions  
For any issue, first ensure that you are using the latest firmware for the  
WD Sentinel server. See “Updating Software” on page 39 for instructions.  
First Steps Checklist  
Is the power supply plugged in to the wall outlet and the drive?  
Are all cables correctly connected and secured?  
Is the power on? If not, see “LEDs” on page 11.  
Specific Problems and Corrective Actions  
The following section contains specific problems that may arise during the use of the  
WD Sentinel server and provides possible solutions.  
LEDs do not light up  
1. Make sure the power cord is connected correctly.  
2. Make sure that the wall outlet has power. Test it by plugging in another device.  
3. Confirm the network cable is properly connected to the WD Sentinel server and the  
network switch or router.  
4. Make sure the network switch or router has power.  
5. Use a different network cable and port on the network switch or router. Temporarily  
swapping the WD Sentinel’s cable port with a working network device may identify any  
failing cables and ports.  
Connecting to Shared Folders on a WD Sentinel server from a  
Windows PC on which Launchpad is not installed  
Windows 8:  
1. On your keyboard, click the Windows logo key  
+ E  
2. On the Computer screen toolbar, select Map Network Drive, then select Map  
Network Drive.  
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3. From the Drive drop-down list, choose the letter that you want the WD Sentinel server  
to have in Computer.  
4. Click Browse to find the folder that you want to map, or type the path to the server  
using the format \\ServerName\FolderName. For example, if the share is called  
Documents, and your server is called MyServer, you would enter  
\\MyServer\Documents.  
5. If you want the drive to reconnect whenever the computer is rebooted, click the  
Reconnect at logon check box.  
6. Click Finish.  
Windows 7 / Vista / XP:  
1. Right-click (My) Computer and select Map Network Drive.  
2. From the Drive drop-down list, choose the letter that you want the WD Sentinel server  
to have in (My) Computer.  
3. Click Browse to find the folder that you want to map, or type the path to the server  
using the format \\ServerName\FolderName. For example, if the share is called  
Documents, and your server is called MyServer, you would enter  
\\MyServer\Documents.  
4. If you want the drive to reconnect whenever the computer is rebooted, click the  
Reconnect at logon check box.  
5. Click Finish.  
Cannot access Windows PCs via Remote Access  
Internet Explorer 8 or greater is required to access a Windows PC using the Remote Web  
Access feature of the WD Sentinel server. There is an Active X Client requirement that comes  
standard with these browsers. For more information, see Knowledge Base Answer ID 8578.  
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MANAGING ISCSI STORAGE  
Managing iSCSI Storage  
9
iSCSI Overview  
iSCSI Roles  
Managing iSCSI Targets  
iSCSI Overview  
Internet SCSI (iSCSI) is an industry standard developed to enable transmission of SCSI  
block storage commands and data over an existing IP network by using the TCP/IP  
protocol. The encapsulated SCSI commands and data can be transmitted over a local area  
network (LAN) or a wide area network (WAN). As with traditional SCSI, an iSCSI storage  
solution requires at least one “initiator” residing on the client computer and at least one  
“target” residing on the storage server.  
Once the connection is established between the iSCSI initiator and the iSCSI target, the  
operating system on the iSCSI initiator sees the storage as a local storage device that can  
be formatted, read and written in the usual manner.  
Your WD Sentinel server allows you to create and manage iSCSI targets. The iSCSI target  
provides storage, similar to a local hard disk drive, but is accessed over a network rather  
than locally. The iSCSI target is protected by the underlying RAID structure of the WD  
Sentinel server.  
iSCSI Roles  
Initiator: A client computer that accesses storage devices using SCSI commands over an  
IP network.  
Target: A network-attached storage device that provides access to logical disks (which can  
be created on the WD Sentinel server).  
Managing iSCSI Targets  
Click the iSCSI icon to open the iSCSI page:  
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Setting  
Alias  
Description  
The user-friendly name used as an additional descriptive  
name for the target.  
Status  
The status of your target.  
•
•
xx initiators connected.  
Disabled  
Security  
The assigned security for the target.  
•
•
None: No security has been assigned to this target  
CHAP: Challenge Handshake Authentication  
Protocol (CHAP) security has been assigned to the  
target.  
Size  
The size of the target (e.g., 4, GB, 1 TB)  
Server Capacity  
Displays the total amount of space on your server and how it  
is distributed (i.e., available server space; used server space).  
Create an iSCSI Target  
To create an iSCSI Target that can be used in the WD Sentinel RX4100 server:  
1. Click Create an iSCSI Target in the ISCSI Tasks pane. The New iSCSI Target window  
appears.  
2. In the Alias field, enter an alias for your target. The alias should be a descriptive name for  
your target.  
3. In the Size field, enter the size of your target, then select the unit of information (e.g. KB,  
MB, GB, TB) from the pull-down menu.  
Note: Available space displays to the right of this field.  
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4. Click Create this target from an existing image file to create a target from an  
existing image file.  
Note: Use this step only if you have an existing iSCSI target image file.  
a. Select the … button.  
b. On the “Image file to use:” window, navigate to the location of your target image file,  
then click Open.  
5. Select the security type for your target.  
None: Does not assign security for your target.  
CHAP: Assigns Challenge Handshake Authentication Protocol (CHAP) security to  
your target.  
- If you’d like to change your User Name, click Edit. Note that the name must match  
your initiator CHAP name.  
- Enter your Target Secret. The Target Secret is a security key that must be between  
12 to 16 alphanumeric characters.  
6. Click Create Target.  
Edit an iSCSI Target  
1. On the iSCSI Tasks pane, click Edit Target Settings.  
2. Modify the required and optional settings as desired.  
3. Click Modify Target.  
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Disable an iSCSI Target  
Note: Disabling your iSCSI Target temporarily suspends the target, but does not remove it.  
If you’d like to permanently remove the target, See “Deleting an iSCSI Target” on  
page 89.  
1. In the iSCSI tab, select the target you’d like to disable.  
2. In the iSCSI Tasks pane, click Disable Target. The Disable a Target message appears.  
3. Click Disable Target. Disabled now displays in the Status column.  
Enabling an iSCSI Target  
1. In the iSCSI tab, select the disabled Target you’d like to enable.  
2. In the iSCSI Task pane, click Enable Target. Your target is now enabled.  
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Deleting an iSCSI Target  
WARNING! Deleting your iSCSI Target completely removes the target. If you’d  
like to temporarily disable the target, See “Disable an iSCSI Target”  
on page 88.  
1. In the iSCSI tab, select the target you’d like to delete.  
2. In the Task Pane, click Delete Target. The Delete a Target message displays.  
3. Click Delete Target. Your Target is deleted and removed from the iSCSI target list.  
Exporting an iSCSI Target  
1. On your desktop, open Windows Explorer.  
2. Under Network, select your WD Sentinel device.  
3. Select the folder to which you’ve saved your iSCSI Target image files (usually the  
Server>TargetImageFiles folder).  
4. Right-click the target you’d like to export and select Copy from the menu.  
5. Navigate to a different folder.  
6. Right-click in the folder and select Paste. Your iSCSI Target image file is now “exported”  
to a different folder.  
Note: The target image files will have the same name as the iSCSI target you just copied  
and will have a ".img" file extension.  
Importing an iSCSI Target  
To import an iSCSI Target into your WD Sentinel, follow the steps outlined in “Create an  
iSCSI Target” on page 86, following step 4 (selecting the Create this target from an existing  
image file checkbox) to import your iSCSI target.  
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REGULATORY AND WARRANTY INFORMATION  
Regulatory and Warranty Information  
10  
Regulatory Compliance  
Limited Warranty  
GNU General Public License (“GPL”)  
Regulatory Compliance  
FCC Class A Information  
This device has been tested and found to comply with the limits of a Class A digital device,  
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable  
protection against harmful interference in a residential installation. This unit generates, uses,  
and can radiate radio frequency energy and, if not installed and used in accordance with the  
instructions, may cause harmful interference to radio or television reception. However, there  
is no guarantee that interference will not occur in a particular installation. Any changes or  
modifications not expressly approved by WD could void the user's authority to operate this  
equipment.  
The following booklet, prepared by the Federal Communications Commission, may be  
helpful: How to Identify and Resolve Radio/TV Interference Problems. This booklet is Stock  
No. 004-000-00345-4 available from the US Government Printing Office, Washington,  
DC 20402.  
The provided Ethernet cable must be used between the unit and network connection to  
comply with FCC Part 15 Class A and EN-55022 Class A.  
Operation of this device is subject to the following two conditions: (1) This device may not  
cause harmful interference, and (2) this device must accept any interference received,  
including interference that may cause undesired operation.  
Changes or modifications not expressly approved by the party responsible for compliance  
could void the user’s authority to operate the equipment.  
(a) For a Class A digital device or peripheral, the instructions furnished the user shall include  
the following or similar statement, placed in a prominent location in the text of the manual:  
Note: This equipment has been tested and found to comply with the limits for a Class A  
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide  
reasonable protection against harmful interference when the equipment is operated in a  
commercial environment. This equipment generates, uses, and can radiate radio frequency  
energy and, if not installed and used in accordance with the instruction manual, may cause  
harmful interference to radio communications. Operation of this equipment in a residential  
area is likely to cause harmful interference in which case the user will be required to correct  
the interference at his own expense.  
(b) For a Class B digital device or peripheral, the instructions furnished the user shall include  
the following or similar statement, placed in a prominent location in the text of the manual:  
Note: This equipment has been tested and found to comply with the limits for a Class B  
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide  
reasonable protection against harmful interference in a residential installation. This  
equipment generates, uses and can radiate radio frequency energy and, if not installed and  
used in accordance with the instructions, may cause harmful interference to radio  
communications. However, there is no guarantee that interference will not occur in a  
particular installation. If this equipment does cause harmful interference to radio or television  
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reception, which can be determined by turning the equipment off and on, the user is  
encouraged to try to correct the interference by one or more of the following measures:  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment into an outlet on a circuit different from that to which  
the receiver is connected.  
Consult the dealer or an experienced radio/TV technician for help.  
ICES/NMB-003 Compliance  
Cet appareil de la classe B est conforme à la norme NMB-003 du Canada.  
This device complies with Canadian ICES-003 Class A.  
Safety Compliance  
Approved for US and Canada. CAN/CSA-C22.2 No. 60950-1, UL 60950-1-07: Safety of  
Information Technology Equipment.  
Approuvé pour les Etats-Unis et le Canada. CAN/CSA-C22.2 No. 60950-1-07 : Sûreté  
d'équipement de technologie de l'information.  
This product is intended to be supplied by a listed limited power source, double insulated, or  
direct plug-in power unit marked “Class 1.”  
This equipment is to be deployed in restricted access location only.  
Rack Mount Instructions - The following or similar rack-mount instructions are included  
with the installation instructions:  
- Elevated Operating Ambient - If installed in a closed or multi-unit rack assembly,  
the operating ambient temperature of the rack environment may be greater than  
room ambient. Therefore, consideration should be given to installing the equip-  
ment in an environment compatible with the maximum ambient temperature (Tma)  
specified by the manufacturer.  
- Reduced Air Flow - Installation of the equipment in a rack should be such that the  
amount of air flow required for safe operation of the equipment is not compro-  
mised.  
- Mechanical Loading - Mounting of the equipment in the rack should be such that  
a hazardous condition is not achieved due to uneven mechanical loading.  
- Circuit Overloading - Consideration should be given to the connection of the  
equipment to the supply circuit and the effect that overloading of the circuits might  
have on overcurrent protection and supply wiring. Appropriate consideration of  
equipment nameplate ratings should be used when addressing this concern.  
- Reliable Earthing - Reliable earthing of rack-mounted equipment should be main-  
tained. Particular attention should be given to supply connections other than direct  
connections to the branch circuit (e.g. use of power strips).  
CAUTION! Danger of explosion if the battery is incorrectly replaced. Replace only  
with the same or equivalent type recommended by the equipment manufacturer.  
Dispose of used batteries according to manufacturer’s instructions.  
CE Compliance for Europe  
Verified to comply with EN55022 for RF emission; EN-55024 for Generic Immunity, as  
applicable; and EN-60950-1 for Safety.  
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Environmental Compliance (China)  
Obtaining Service  
WD values your business and always attempts to provide you the very best of service. If this  
Product requires maintenance, either contact the dealer from whom you originally  
purchased the Product or visit our product support website at http://support.wd.com for  
information on how to obtain service or a Return Material Authorization (RMA). If it is  
determined that the Product may be defective, you will be given an RMA number and  
instructions for Product return. An unauthorized return (i.e., one for which an RMA number  
has not been issued) will be returned to you at your expense. Authorized returns must be  
shipped in an approved shipping container, prepaid and insured, to the address provided on  
your return paperwork. Your original box and packaging materials should be kept for storing  
or shipping your WD product. To conclusively establish the period of warranty, check the  
warranty expiration (serial number required) via http://support.wd.com. WD shall have no  
liability for lost data regardless of the cause, recovery of lost data, or data contained in any  
Product placed in its possession.  
Limited Warranty  
WD warrants that the Product, in the course of its normal use, will for the term defined  
below, be free from defects in material and workmanship and will conform to WD's  
specification therefor. The term of your limited warranty depends on the country in which  
your Product was purchased. The term of your limited warranty is for 3 years in the North,  
South and Central America region, 3 years in the Europe, the Middle East and Africa region,  
and 3 years in the Asia Pacific region, unless otherwise required by law. The term of your  
limited warranty period shall commence on the purchase date appearing on your purchase  
receipt. WD may at its discretion make extended warranties available for purchase. WD shall  
have no liability for any Product returned if WD determines that the Product was stolen from  
WD or that the asserted defect a) is not present, b) cannot reasonably be rectified because  
of damage occurring before WD receives the Product, or c) is attributable to misuse,  
improper installation, alteration (including removing or obliterating labels and opening or  
removing external enclosures, including the mounting frame, unless the product is on the list  
of limited user-serviceable products and the specific alteration is within the scope of the  
applicable instructions, as found at http://support.wd.com), accident or mishandling while in  
the possession of someone other than WD. Subject to the limitations specified above, your  
sole and exclusive warranty shall be, during the period of warranty specified above and at  
WD's option, the repair or replacement of the Product with an equivalent or better Product.  
The foregoing warranty of WD shall extend to repaired or replaced Products for the balance  
of the applicable period of the original warranty or ninety (90) days from the date of shipment  
of a repaired or replaced Product, whichever is longer. The foregoing limited warranty is  
WD's sole warranty and is applicable only to products sold as new. The remedies provided  
herein are in lieu of a) any and all other remedies and warranties, whether expressed, implied  
or statutory, including but not limited to, any implied warranty of merchantability or fitness for  
a particular purpose, and b) any and all obligations and liabilities of WD for damages  
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REGULATORY AND WARRANTY INFORMATION  
including, but not limited to accidental, consequential, or special damages, or any financial  
loss, lost profits or expenses, or lost data arising out of or in connection with the purchase,  
use, or performance of the Product, even if WD has been advised of the possibility of such  
damages. In the United States, some states do not allow exclusion or limitations of  
incidental or consequential damages, so the limitations above may not apply to you. This  
warranty gives you specific legal rights, and you may also have other rights which vary from  
state to state.  
GNU General Public License (“GPL”)  
Firmware incorporated into this product may include third party copyrighted software  
licensed under the GPL or Lesser General Public License ("LGPL") (collectively, “GPL  
Software”) and not Western Digital’s End User License Agreement. In accordance with the  
GPL, if applicable: 1) the source code for the GPL Software may be downloaded at no  
charge from http://support.wd.com/download/gpl or obtained on CD for a nominal charge from  
http://support.wd.com/download/gpl or by calling Customer Support within three years of the  
date of purchase; 2) you may re-use, re-distribute, and modify the GPL Software; 3) with  
respect solely to the GPL Software, no warranty is provided, to the extent permitted by  
applicable law; and 4) a copy of the GPL is included herewith, may be obtained at  
http://www.gnu.org, and may also be found at http://support.wd.com/download/gpl.  
Modification of or tampering with the Software, including but not limited to any Open Source  
Software, is solely at your own risk. Western Digital is not responsible for any such  
modification or tampering. Western Digital will not support any product in which you have or  
have attempted to modify the Software supplied by Western Digital.  
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APPENDIX  
Appendix  
11  
Hardware Replacement Procedures  
WD Sentinel RX4100 Administrator Reference Sheet  
Hardware Replacement Procedures  
Before You Begin  
Installing the WD Sentinel Bezel  
Replacing a Hard Drive  
Removing the Unit Cover  
Replacing the Internal Power Supply  
Replacing a Server Fan  
Replacing the Riser Card  
Replacing the Mid-plane Card  
This chapter provides the steps necessary to replace the following components designed for  
replacement for the WD Sentinel RX4100.  
Hard Drive  
Power Supply  
Fans  
Riser  
Midplane  
The WD Sentinel is also designed to be easily mounted on a rack.  
Before You Begin  
Ensure that you have the correct replacement unit.  
Review the procedures before beginning to replace a part.  
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APPENDIX  
Installing the WD Sentinel Bezel  
The removable WD Sentinel bezel protects the units hard drive and power button from  
accidental use or removal. Use the following steps to install and remove the front bezel.  
What you’ll Need:  
WD Sentinel Bezel  
Bezel keys (2)  
Installing the WD Sentinel Bezel  
1. Insert the bezel keys into both locks on the front of the bezel, turning the keys  
clockwise to unlock the locks (Figure 1).  
Figure 1. Bezel locks  
2. Place the bezel over the bezel handles on the front of the unit.  
3. Turn both keys counter clockwise to lock the bezel.  
4. Remove both keys and place them in a safe location.  
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APPENDIX  
Replacing a Hard Drive  
It is simple to replace a drive in your WD Sentinel server. First, make sure to go to the WD  
Store to purchase a compatible replacement drive. For a complete list of approved drive  
models, search for Answer ID 9443 in the WD Knowledge Base at http://support.wd.com.  
The drives in the WD Sentinel server are “hot swappable.” This means that the  
WD Sentinel server can remain powered on while you replace the drive. Once you replace  
the drive, the WD Sentinel server automatically reconfigures the RAID. (See “Find compatible  
hard drives” on page 37.)  
What you’ll Need:  
Phillips screwdriver  
Replacement hard drive  
Replacing a Hard Drive  
Use the following steps to replace a drive in your WD Sentinel server.  
1. Unlock and remove the front bezel, if installed.  
2. For a failed drive, verify that the LED for the failed drive is solid red.  
3. Push the drive button and unlatch the handle on the front of the hard drive ().  
Figure 2. Drive tray button  
4. Remove the drive tray (Figure 3).  
Figure 3. Remove drive tray  
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APPENDIX  
5. Remove the four (4) screws holding the drive to the drive tray.  
6. Replace the failed drive with the approved replacement drive.  
7. Replace the four (4) screws holding the drive to the drive tray.  
8. Insert the drive tray into the server, snapping the drive tray handle shut.  
9. The LED remains blue (static) until the rebuild is complete.  
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APPENDIX  
Removing the Unit Cover  
Use the following steps remove the cover on the WD Sentinel RX4100 device. These steps  
are necessary to replace certain internal parts.  
Important: To avoid electrostatic discharge (ESD) problems, ground yourself by  
touching metal before handling the device.  
To shut down your WD Sentinel server, follow the steps outline in “Shutting Down the  
Server” on page 45.  
What you’ll Need:  
Phillips screwdriver  
Removing the Unit Back Cover  
1. Before getting started, shut down the server and disconnect all external connections.  
2. Place the unit on a clean and stable surface, with the back of the unit facing you.  
3. Release two (2) screws on the top of the unit and unscrew two (2) thumbscrews on the  
back of the unit.  
Figure 4. Remove and unscrew unit screws  
4. Push the unit cover away from you to release the cover, then lift it away from the unit  
(Figure 5).  
Figure 5. Remove unit cover  
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APPENDIX  
Removing the Unit Front Cover  
1. Before getting started, shut down the server and disconnect all external connections.  
2. Place the unit on a clean and stable surface, with the front of the unit facing you.  
3. On the top of the unit, release the two (2) screws closest to you and two (2) screws  
toward the top middle of the unit (Figure 6).  
Figure 6. Remove unit front screws  
4. Push the unit cover away from you to release the cover, then lift it away from the unit  
(Figure 7).  
Figure 7. Remove unit front cover  
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APPENDIX  
Replacing the Internal Power Supply  
When the internal power supply requires replacement, you will receive an e-mail Alert  
indicating that there is a problem.  
The power supply in the WD Sentinel server is “cold swappable.” This means that the WD  
Sentinel server must be shut down prior to your power supply replacement. To shut down  
your WD Sentinel server, follow the steps outline in “Shutting Down the Server” on page 45.  
What you’ll Need:  
Phillips screwdriver  
Replacement internal power supply  
Replacing the Internal Power Supply  
1. Shut down the server.  
2. Disconnect all external connections, including the A/C power cord.  
3. Follow the steps outlined in “Removing the Unit Cover” on page 98.  
4. Locate the power supply in the right corner of the unit (Figure 8).  
Figure 8. Locate power supply  
5. Remove two (2) screws holding the power supply to the bottom of the unit (Figure 9).  
6. On the back of the unit, remove two (2) screws holding the power supply in place  
(Figure 9).  
Figure 9. Remove bottom and back power supply screws  
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APPENDIX  
7. Gently lift the power supply out of the unit.  
8. Insert the replacement power supply into the unit.  
9. Insert and tighten the two (2) screws holding the power supply to the bottom of the  
unit.  
10. On the back of the unit, insert and tighten the two (2) screws holding the power supply  
in place.  
11. Reconnect the power cable to the server.  
12. Replace the unit cover.  
13. Connect the A/C power cord to the unit.  
14. Restart the server.  
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APPENDIX  
Replacing a Server Fan  
When a fan requires replacement, you will receive an e-mail Alert indicating that there is a  
problem with one of your WD Sentinel server fans.  
The fans in the WD Sentinel server are “cold swappable.” This means that the WD Sentinel  
server must be shut down prior to your fan replacement. To shut down your WD Sentinel  
server, follow the steps outline in “Shutting Down the Server” on page 45.  
What you’ll Need:  
Phillips screwdriver  
Replacement server fan  
Replacing a Server Fan  
1. Shut down the server.  
2. Disconnect all external connections, keeping the power cord plugged in.  
3. Follow the steps outlined in “Removing the Unit Cover” on page 98.  
4. Locate the fan that needs to be replaced (Figure 10). An LED identifies the failed fan.  
Figure 10. Locate fan  
5. Carefully disconnect the fan interface connector and remove the fan from the unit  
(Figure 11).  
Figure 11. Remove fan  
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APPENDIX  
6. Gently place the replacement fan in the unit, ensuring that the orientation of the fan is  
correct.  
7. Carefully connect the fan interface connector.  
8. Replace the unit cover.  
9. Connect all external connections.  
10. Restart the server.  
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APPENDIX  
Replacing the Riser Card  
The riser card in the WD Sentinel server is “cold swappable.” This means that the WD  
Sentinel server must be shut down prior to your fan replacement. To shut down your WD  
Sentinel server, follow the steps outline in “Shutting Down the Server” on page 45.  
What you’ll Need:  
Phillips screwdriver  
Replacement riser card  
Replacing a Riser Card  
1. Shut down the server.  
2. Disconnect all external connections.  
3. Follow the steps outlined in “Removing the Unit Cover” on page 98.  
4. Locate the riser card bracket within the unit and remove three (3) screws holding the  
bracket in place.  
5. Carefully lift the riser card bracket up and away from the unit.  
6. Remove three (3) screws holding the riser card bracket to the riser card.  
7. Remove the riser card bracket and lay it aside.  
8. With new riser card in hand, remove the connector cables from the old riser card and  
connect them to the same location on the new riser card.  
9. Insert and tighten three (3) screws, attaching the riser card bracket to the new riser  
card.  
10. Gently reattach the new riser card to the unit.  
11. Insert and tighten three (3) screws attaching the riser card bracket to the unit.  
12. Replace the unit cover.  
13. Connect all external connections.  
14. Restart the server.  
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APPENDIX  
Replacing the Mid-plane Card  
The mid-plane in the WD Sentinel server is “cold swappable.” This means that the WD  
Sentinel server must be shut down prior to your fan replacement. To shut down your WD  
Sentinel server, follow the steps outline in “Shutting Down the Server” on page 45.  
What you’ll Need:  
Phillips screwdriver  
Replacement mid-plane card  
Replacing a Mid-plane Card  
1. Shut down the server.  
2. Disconnect all external connections.  
3. Remove all hard drives from the unit.  
4. Follow the steps outlined in “Removing the Unit Front Cover” on page 99.  
5. Locate the mid-plane within the unit (behind the drive trays) and remove two (2) screws  
holding the mid-plane to the base of the unit.  
6. Remove the eight (8) screws holding the mid-plane to the mid-plane bracket.  
7. Carefully pull the mid-plane away from the mid-plane bracket,  
Figure 12.  
8. With new mid-plane in hand, remove the connector cables from the old mid-plane and  
connect them to the same location on the new mid-plane.  
9. Gently place the new mid-plane in place.  
10. Insert and tighten eight (8) screws attaching the mid-plane bracket to the mid-plane.  
11. Insert and tighten two (2) screws attaching the mid-plane to the unit.  
12. Replace the unit cover.  
13. Replace the hard drives.  
14. Connect all external connections.  
15. Restart the server.  
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APPENDIX  
WD Sentinel RX4100 Administrator Reference Sheet  
Provided below is a reference sheet that allows you to keep all of the useful information  
associated with your WD Sentinel RX4100 server in one location. Enter the information  
identified below and keep this checklist in a safe location for future reference.  
WD Sentinel RX4100 Server Name: __________________________________________  
WD Sentinel RX4100 IP Address:  
Static IP Address: ____________________________________________  
Dynamic IP Address: _________________________________________  
WD Sentinel RX4100 Server Password: _______________________________________  
User Name: ____________________________________  
Domain Name: __________________________________  
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INDEX  
compliance 90  
regulatory 90  
safety 91  
computers  
connecting 28  
Remote Web Access 57  
computers and backups  
managing 35  
Computers and Backups icon 59  
connecting  
Mac 23  
Windows PC 20  
connecting Windows PC to shared folders  
without Launchpad 83  
cooling fan 36  
Index  
A
About tab 34  
accessing Dashboard 28  
accessing Launchpad  
Mac 51  
Windows PC 49  
accessing shared folders  
via network 56  
via Remote Web Access 57  
accessories  
active domain server 45  
adding a user account 31  
add-ins  
6
Customer Support  
monitoring 35  
automatic request 37  
contacts iii  
Administrator Reference Sheet 106  
Administrator’s tasks 13  
alert icons 33  
D
alerts 35  
Dashboard  
accessing 28  
monitoring 35  
setting 40  
description of WD Sentinel RX4100  
3
automatic backups 59, 64  
automatically updating WD software  
43  
document conventions  
domain 45  
drives  
2
finding compatible 37  
lock/unlock 38  
B
back view 10  
backing up  
E
using Dashboard 61  
using Launchpad 60  
Windows PC 58, 60, 61  
with Time Machine 61  
backing up your server 66  
backups  
automatic 59, 64  
bare metal restore 64  
basic product information 34  
best practices  
getting started 34  
replacing drives 82  
setting up client computers 81  
setting up WD Sentinel RX4100 81  
sharing files with external users 82  
shutting down 82  
using efficiently 81  
bezel  
email alerts  
setting up 41  
enabling remote web access 44  
environmental compliance (China) 92  
external users’ tasks 13  
F
fan  
replacing 102  
FCC Class B information 90  
files and folders  
recovering 64, 65  
front view  
with bezel  
9
without bezel 10  
G
global alerts  
setting 40  
installing 95  
GNU general public license 93  
C
H
China RoHS 92  
handling precautions  
2
107  
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INDEX  
hard drive  
managing 35  
M
Mac  
replacing 96  
Health tab 36  
help  
where to find 12  
Help icon 30  
Home page 33  
tabs 34  
accessing Launchpad 51  
backing up 61  
connecting to WD Sentinel 23  
managing iSCSI targets 85  
managing server settings 43  
managing the Launchpad 53  
manual updates  
tasks panel 34  
WD 39  
media library, accessing remotely 58  
Microsoft software  
updating 43  
mid-plane card  
replacing 105  
Monitor icon 35  
monitoring add-ins 35  
monitoring system health 35, 36  
I
ICES/NMB-003 compliance 91  
icon  
Add-ins 35  
alerts 33  
Computer and Backups 35  
Computers and Backups 59  
Help 30  
Launchpad 49, 50  
Monitor 35  
N
navigation icons 30  
navigation 30  
Server Folders and Hard Drives 35  
Trash 55  
network connection health 36  
O
office uses 15  
User 34  
online product registration iii  
operating system requirements  
internal users’ tasks 13  
iSCSI  
7
managing targets 85  
overview 85  
iSCSI target  
P
password  
Administrator 13  
lock/unlock 38  
password and user name 14  
power supplies 36  
power supply  
creating 86  
deleting 89  
disabling 88  
editing 87  
enabling 88  
replacing internal 100  
product information  
exporting 89  
importing 89  
managing 85  
recording  
2
product registration iii  
L
R
Launchpad  
RAID storage 46  
accessing on a PC 49  
backing up 60  
icon 49, 50  
managing 53  
options 52  
rebooting the WD Sentinel server 26  
recovering data  
PC 64  
recovering the WD Sentinel server 66  
reference resources 12  
registration, online iii  
regulatory compliance 90  
Remote Web Access  
starting a backup 60  
uninstalling on a Mac computer 55  
uninstalling on Windows PC 55  
lock password, changing 39  
accessing computers and shared fold-  
ers 57  
108  
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INDEX  
media library 58  
remote web access  
shutting down the server 45  
software updates  
Microsoft 43  
enabling 44  
removing the server cover 98  
removing the unit back cover 98  
removing the unit front cover 99  
replacement drives 37  
requirements  
WD 43  
specifications  
storage 36, 47  
managing 46  
8
RAID 46  
operating systems  
server recovery 66  
restore  
7
system health 35  
monitoring 35  
system temperature 36  
backed up Windows PC data 64  
restoring data and settings 64, 65  
riser card  
replacing 104  
RoHS 92  
T
tabs  
Home page 34  
Updating Software 39  
target  
S
creating 86  
deleting 89  
disabling 88  
editing 87  
enabling 88  
exporting 89  
importing 89  
managing 85  
tasks  
safe shutdown 45  
safety compliance 91  
safety instructions  
scheduling Automatic Backups  
Dashboard 59  
1
PC 59  
Time Machine 61  
scheduling WD software updates 43  
server  
Health 36  
Home page 34  
tasks pane 30  
setting up 28  
shutting down 45  
server fan  
technical specifications  
8
replacing 102  
server folders  
Technical Support contacts list iii  
temperature 36  
managing 35  
Time Machine  
server recovery 66  
requirements 66  
server settings  
backing up 61  
Trash icon 55  
troubleshooting  
general 44  
homegroup 44  
managing 43  
cannot access Windows PCs via Re-  
mote Access 84  
checklist 83  
media 44  
service  
drive not connecting to network 83  
LEDs do not light up 83  
obtaining 92  
U
setting up email alerts 41  
setting up your server 17  
shared folders  
Underwriters Laboratories Inc. (UL) 91  
updating Microsoft software 43  
updating WD Software 39  
USB  
accessing over the network 56  
accessing remotely 57  
Remote Web Access 57  
sharing data  
USB 47  
shutting down safely 45  
sharing data 47  
storage 47  
USB storage 47  
user account  
adding 31  
109  
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INDEX  
user accounts 14  
managing 34  
user assistance 12  
user roles and responsibilities 13  
users  
external 13  
internal 13  
using 47  
using Time Machine 61  
using USB storage 47  
V
virtual DVD software 66  
W
warning  
lithium battery 2, 67, 70  
unclean shutdown 45  
WD Guardian Services 34  
WD limited warranty 92  
WD Sentinel RX4100  
components 10  
connecting to your network (optional  
method) 16  
connecting to your network (preferred  
method) 15  
how it fits in your office 15  
package contents  
rebooting 26  
6
setting up 17  
shutting down 45  
using locally and remotely 15  
WD sentinel RX4100  
how it fits in your office 15  
WD Service 92  
WD software  
automatic updates 43  
manual updates 39  
updating 39  
Windows PC  
backing up 58  
backing up via Dashboard 61  
backing up via Launchpad 60  
connecting to WD Sentinel 20  
restoring 64  
110  
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Information furnished by WD is believed to be accurate and reliable; however, no responsibility is  
assumed by WD for its use nor for any infringement of patents or other rights of third parties which may  
result from its use. No license is granted by implication or otherwise under any patent or patent rights of  
WD. WD reserves the right to change specifications at any time without notice.  
Western Digital, WD, and the WD logo are registered trademarks in the U.S. and other countries;  
WD Sentinel and WD Guardian are trademarks of Western Digital Technologies, Inc in the U.S. and other  
countries. Other marks may be mentioned herein that belong to other companies.  
© 2013 Western Digital Technologies, Inc. All rights reserved.  
Western Digital Corporation  
3355 Michelson Drive, Suite 100  
Irvine, California 92612 U.S.A.  
4779-705094-A00 May 2013  
.
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