StorageTek Switch SCSI 3 User Manual
StorageNet Fibre Channel Switch 4000  
SES (SCSI-3 Enclosure Services)  
User Guide  
8946121402  
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StorageNet Fibre Channel Switch 4000  
SES (SCSI-3 Enclosure Services)  
User Guide  
8946121402  
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Revision History  
Tab Level/Date  
01 (08/98)  
Description  
Initial release.  
02 (03/99)  
Manual release corresponding to Release 1.6a.  
The U.S. Department of Commerce restricts the distribution of technical information contained  
in this document when exported outside the U.S. Therefore, careful attention should be given  
to compliance with all applicable U.S. Export Laws if any part of this document is to be  
exported.  
© 1999 Storage Technology Corporation, Louisville, Co. All rights reserved. Printed in USA.  
Address comments concerning this manual to:  
StorageTek  
Technical Communications  
7600 Boone Avenue North  
Minneapolis, MN 55428-1099  
USA  
Comments may also be submitted over the Internet by addressing them to:  
[email protected]  
Always include the complete publication number and title of the document with your  
comments.  
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About This Document  
Introduction  
Use this guide for monitoring, configuring, and maintaining a StorageNet Fibre Channel  
Switch 4000 through SCSI-3 Enclosure Services (SES). You should be knowledgeable about  
networking in general, routing and bridging in particular. A clearly defined network and  
security plan is necessary. Your security plan should assess the possible risks to your network  
and define access policies to deal with those risks.  
How This Guide is Organized  
This guide is divided into the following chapters:  
•
•
•
Chapter 1 “Product Overview”, provides an overview of SES and SES Management.  
Chapter 2 “SES Concepts”, describes the concepts associated with SES.  
Chapter 3 “SES Commands”, describes FC-PH constructs, FCP and SES commands,  
and diagnostics pages.  
•
Chapter 4 “Troubleshooting”, describes command error messages.  
The following appendix is also included in this guide:  
Appendix A “Glossary”.  
•
Reference Documents  
The following documents contain information related to SES:  
Fibre Channel Standards. For detailed information on the Fibre Channel standards, see the  
Fibre Channel Association web site at http://www.fibrechannel.com.  
StorageNet Fibre Channel Switch 4000 Installation and Reference Guide (8946119902)  
StorageNet Fibre Channel Switch 4000 WEB TOOLS User Guide (8946121602)  
StorageNet Fibre Channel Switch 4000 ZONING User Guide (8946121502)  
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Notice to the Reader  
The material contained in this publication is for informational purposes only and is subject to  
change without notice. StorageTek is not responsible for the use of any product options or  
features not described in this publication, and assumes no responsibility for any errors that  
may appear in this publication. Refer to the revision history (at the beginning of this  
document) to determine the revision level of this publication.  
StorageTek does not by publication of the descriptions and technical documentation contained  
herein, grant a license to make, have made, use, sell, sublicense, or lease any equipment or  
programs designed or constructed in accordance with this document or programs designed or  
constructed in accordance with this information.  
Customer Support  
For technical support, please call StorageTek at 1-800-248-8777.  
Before calling StorageTek, please have your information from the Problem Reporting form  
ready. This form is located at the back of this manual.  
If a problem cannot be resolved through Customer Support, a Return Material Authorization  
(RMA) is issued. Instructions are provided on where to return the part and how to receive a  
replacement part. If the product is installed by the customer, the customer is responsible for  
returning the product with freight paid to the nearest repair center.  
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Table of Contents  
Chapter 1 Product Overview  
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1  
SES Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1  
Chapter 2 SES Concepts  
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1  
SES Functional Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1  
Access to the Enclosure Services Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3  
Access Through an Enclosure Services Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3  
Indicators and Control Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3  
Chapter 3 SES Commands  
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1  
Constructs, Commands and Diagnostic Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1  
FCP Constructs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2  
FCP Command Information Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2  
FCP Transfer Ready Information Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3  
FCP Data Information Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3  
FCP Response Information Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3  
FCP and SES Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4  
Switch Diagnostics Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5  
Supported Diagnostics Pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5  
Switch Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6  
Sensor Table Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7  
Fabric Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7  
Neighborhood Table Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8  
Fibre Channel Port Table Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8  
Name Server Local Table Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10  
Inquiry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11  
Receive Diagnostic Results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13  
Report LUNs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14  
Request Sense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14  
Send Diagnostic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15  
Test Unit Ready . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15  
Reject. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16  
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Chapter 4 Troubleshooting  
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1  
License Reject . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1  
CHECK CONDITION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1  
Invalid Field Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1  
Appendix A Glossary  
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List of Figures  
Figure 1-1  
Figure 2-1  
Figure 2-2  
SES Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2  
SES Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1  
SES Functional Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2  
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List of Tables  
Table 1-1  
Table 2-1  
Table 2-2  
Table 3-1  
Table 3-2  
Table 3-3  
Table 3-4  
Table 3-5  
Table 3-6  
Table 3-7  
Table 3-8  
Table 3-9  
Table 3-10  
Table 3-11  
Table 3-12  
Table 3-13  
Table 3-14  
Table 3-15  
Table 3-16  
Table 3-17  
Table 3-18  
Table 3-19  
Table 3-20  
Table 3-21  
Table 3-22  
Table 3-23  
Table 3-24  
Table 3-25  
Table 3-26  
Table 3-27  
Table 3-28  
Example LUN Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2  
Format of LUN recognized by SESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2  
LUN Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2  
Constructs, Commands and Diagnostic Pages . . . . . . . . . . . . . . . . . . . . .3-1  
FCP Information Unit Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2  
FCP_CMND IU Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3  
FCP_RSP Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3  
FCP_STATUS Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4  
Supported Operation Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4  
Diagnostics Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5  
Switch MIB Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5  
Page Code 0 Format – Supported Diagnostic Pages . . . . . . . . . . . . . . . .3-5  
Switch Page Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6  
Sensor Table Page Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7  
Format of Fabric Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7  
Neighborhood Table Page Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8  
Fibre Channel Port Table Page Format . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9  
Format of Name Server Local Table Page . . . . . . . . . . . . . . . . . . . . . . . .3-10  
Inquiry Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11  
Inquiry Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11  
Page Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12  
SESD Return Codes for 00h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12  
SESD Return Codes for 80h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12  
SESD Return Codes for 83h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13  
Receive Diagnostic Results Command Format . . . . . . . . . . . . . . . . . . . . .3-13  
Report LUNs Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14  
Reported LUNs Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14  
Request Sense Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14  
Send Diagnostic Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15  
Test Unit Ready Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15  
Reject Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16  
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Chapter 1 Product Overview  
Introduction  
This chapter describes StorageTek’s implementation of SES (SCSI-3 Enclosure Services) on  
the StorageNet Fibre Channel Switch 4000.  
SES implementation in a SCSI-3-based Host Adapter is up to the adapter manufacturer and  
StorageTek cannot determine their implementation. Therefore, the focus of this guide is to  
discuss StorageTek’s implementation of SES within the Fabric.  
Note: Currently, the SES standard is in DRAFT status and is subject to change. See  
“Reference Documents” for a pointer to the SES Standards Committee’s web site.  
SES Management  
SES is an in-band mechanism for managing devices, such as switches, within a Fabric or other  
enclosures. SES commands are used to manage and sense the operational status of the power  
supplies, cooling devices, displays, indicators, individual drives, and other non-SCSI elements  
installed in a switch (enclosure). The command set uses the SCSI SEND DIAGNOSTICand  
RECEIVE DIAGNOSTIC RESULTScommands to obtain/set configuration information from  
the switch.  
SES allows a SCSI entity (or initiator) to communicate with a switch through a standard Fiber  
Channel Protocol (FCP) connection into the Fabric. The benefits are:  
•
•
SES does not require supporting another protocol  
SES does not require an additional network link (such as Ethernet)  
Figure 1-1 shows the Fabric SES view. The switch’s Domain_IDis used as the Logical Unit  
Number (LUN) address to identify each switch including the switch used for access through  
SES. See the “SES Functional Model” section in Chapter 2 for more information.  
Note: The connection to the Fabric is through the switch labeled LUN5 and which is also  
called LUN0. The connection to the well known management address (FFFFFAh) is  
always labeled LUN0 no matter which switch is used.  
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SES Management  
Figure 1-1 SES Overview  
LUN addressing within the Fabric can be non-sequential because it is based on the switch’s  
Domain_ID. Table 1-1 shows the sample LUN mapping used with Figure 1-1.  
Table 1-1 Example LUN Mapping  
Domain ID  
Unique LUN Value (in Hex)  
00000000 00000000 (Note that Domain ID 5 is used for both LUN 0 and 5)  
01020000 00000000  
5
2
5
01050000 00000000  
6
01060000 00000000  
9
01090000 00000000  
10  
010A0000 00000000  
Figure 1-1 shows that the switch in the lower left hand corner is assigned both LUN5 and  
LUN0. (LUN5 because the switch’s Domain_IDis 5 and LUN0 because the client is  
physically connected to that switch.) LUN values for the first byte, shown in Table 1-1, are:  
•
•
00000000 00000000 - the bold characters indicate the local switch  
0X0X0000 00000000 - the bold characters indicate the SCSI LUN address of the other  
switches in the Fabric  
1-2  
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SES Management  
Therefore, if there are 5 switches in the Fabric SES reports 6 LUNs, one LUN value for each  
switch and LUN0 for the local client connection.  
Other SCSI-3 enclosures can also run SES outside the Fabric, such as JBODs, RAID-5 arrays,  
SCSI-3 hard drives, and SCSI-3 tape drives. These devices are identified by their Fabric and  
SCSI addresses, and are assigned LUNs using standard SCSI-3 host adapter LUN addressing.  
Note: It is not this guide’s intent to describe the environment outside of the Fabric.  
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SES Management  
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Chapter 2 SES Concepts  
Introduction  
This chapter uses generic terms to describe enclosure services and specific SES  
implementation. SES instances can be distributed inside and outside of the Fabric to any  
enclosure capable of supporting enclosure services through an SES device.  
SES is distributed transparently throughout the Fabric, with an instance of a distributed SES  
Device (SESD) on each switch as shown in Figure 2-1.  
Figure 2-1 SES Distribution  
SES Functional Model  
Each instance may be accessed by an SES Application Client by specifying the associated  
unique LUN. See Figure 2-2 for information on LUN addressing. SES implementation also  
provides an SES Application Client an in-band mechanism for managing any Fabric switch  
that it is attached to.  
Figure 2-2 shows the SES functional model.  
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SES Functional Model  
Figure 2-2 SES Functional Model  
SES Application  
Client  
SES Request  
SES Device  
FCP _Port  
FC-PH  
SES Response  
FCP Command  
FCP Response  
FCP Port  
FC-PH  
Request Sequence  
Response Sequence  
At the Fibre Channel level, each SESD is accessible through the Fibre Channel well known  
address, FFFFFAh(Management Server). At the SCSI-3 level, it is associated with a LUN. An  
SES Application Client can refer to any distributed SESD within the Fabric using its LUN. A  
LUN value of 0 is always associated with the local switch that is physically attached to the  
SES Application Client. The unique LUN value is mapped based on peripheral device  
addressing.  
The bus number for each switch is set to 010000bas shown in Table 2-1. The first byte of the  
Target/LUN is set using the Domain_IDof the switch. Bytes 2..7 are set to zero.  
Table 2-1 Format of LUN recognized by SESD  
Byte/Bit  
7
6
5
4
3
2
1
0
0
0
0
Bus Number = 010000b  
1
Target  
or  
...  
7
Logical Unit Number (LUN)  
Table 2-2 shows the LUN mapping.  
Table 2-2 LUN Mapping  
Domain ID  
Unique LUN Value (in Hex)  
0
0h  
01000000 00000000  
01050000 00000000  
010C0000 00000000  
010F0000 00000000  
01190000 00000000  
5
5h  
12  
15  
25  
Ch  
Eh  
19h  
2-2  
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Access to the Enclosure Services Process  
An SES Application Client may easily find the LUN values of all distributed SESDs inside the  
Fabric by using the Report LUNs command. See the “Report LUNs” section in Chapter 3 for  
more information.  
Access to the Enclosure Services Process  
An application client can monitor all enclosures capable of processing the enclosure services  
command set with SES instances distributed throughout a Storage Area Network (SAN).  
Enclosure services can monitor both devices inside and outside of the enclosure, such as an  
Uninterruptable Power Supply (UPS). However, SES pertains only to SES instances inside the  
Fabric.  
An application client connects through Fiber Channel Protocol (FCP) using the Management  
Service address (FFFFAh) to any switch through its LUN. See Figure 1-1. The enclosure  
services command set uses the RECEIVE DIAGNOSTIC RESULTSand SEND DIAGNOSTIC  
commands to any device capable of supporting SES.  
Access Through an Enclosure Services Device  
The Application Client requests information from the SESD to examine status and warning  
information from the switch.  
An Application Client through FCP calls the enclosure services process running on any switch  
as a LUN that has SES enabled. The SESD sets the enclosure services bit (EncServ) in the  
INQUIRYcommand to indicate that it can transport enclosure services information. See the  
“Inquiry” section in Chapter 3 for more information.  
Indicators and Control Management  
SESD is accessed through an application client that uses the SEND DIAGNOSTICcommand to  
transport control information to the enclosure services process. The control information may  
include operations to perform or to modify its operating mode. The application client uses the  
RECEIVE DIAGNOSTIC RESULTScommand with the PFbit set to obtain enclosure status.  
The information returned indicates the actual enclosure state. See the “Receive Diagnostic  
Results” section in Chapter 3 for more information.  
Note: The instructions from the application client may be ignored or overwritten by the  
enclosure service processor to ensure proper state information. For example, the  
enclosure may ignore an instruction to clear an error condition because the condition  
is valid or because the instruction is not supported by the enclosure.  
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Indicators and Control Management  
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Chapter 3 SES Commands  
Introduction  
This chapter contains information and examples on managing SES, including the following:  
•
•
•
FC-PH constructs  
FCP and SES commands  
Diagnostics pages  
Note: SESD can be accessed from any Fabric switch licensed to run SES.  
Constructs, Commands and Diagnostic Pages  
Table 3-1 summarizes the FC-PH constructs, FCP commands, and SES commands.  
Table 3-1 Constructs, Commands and Diagnostic Pages  
Command  
Description  
FCP Information Unit  
SCSI Command to be executed or a task management request.  
Contains SCSI-3 data delivery service parameters.  
FCP Transfer Ready  
Information Unit  
FCP Data Information Unit  
Transfers data.  
FCP Response Information  
Unit  
Contains status and sense information.  
Supported Diagnostics Pages  
Switch Page  
Contains the diagnostic pages supported.  
Contains status information about the switch, its operational state  
and firmware.  
Sensor Table Page  
Fabric Page  
Contains status information about the state of all sensors in the  
switch.  
Contains information about the Fabric, its neighbors and  
domain_ID.  
Neighborhood Table Page  
Contains information about the switch’s neighbors in the Fabric.  
Contains information about the switch’s Fibre Channel ports.  
Fibre Channel Port Table Page  
Name Server Local Table Page Contains information about the SESD.  
Inquiry  
Contains information about the devices and sensors in an  
enclosure.  
Receive Diagnostics Results  
Contains information returned by the SESD about an enclosure.  
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FCP Constructs  
Table 3-1 Constructs, Commands and Diagnostic Pages (Continued)  
Command  
Description  
Report LUNs  
Contains information returned from SESD containing the LUNs  
attached to the SESD.  
Request Sense  
Send Diagnostic  
Test Unit Ready  
Reject  
Used to sense information from the SESD.  
Used to configure/diagnose a logical unit.  
Used to test an LUNs operation state.  
Contains information and status about a unit’s failure.  
FCP Constructs  
Before initiating any FCP request, the Nx_Port associated with the SES Application Client  
(FCP Initiator) must complete an N_Port Login (PLOGI) with the Management Server in Class  
2 or 3.  
Note: The destination address in the PLOGI request must be set to FFFFFAh. The FCP  
Process Login (PRLI) is not required by the SESD.  
The format of an FCP Command (FCP_CMND), FCP Transfer Ready (FCP_XFER_RDY), FCP  
Data (FCP_DATA) and FCP Response (FCP_RSP) conforms to those defined in the SCSI-3  
Fibre Channel Protocol (FCP), Revision 12, X3T10/269, working draft.  
Table 3-2 gives a brief description of the FCP Information Unit.  
Table 3-2 FCP Information Unit Descriptions  
FCP Information Unit  
Description  
FCP_CMND  
The Information Unit contains a SCSI Command to be executed or a task  
management request on a target.  
FCP_XFER_RDY  
The Information Unit indicates that the target is ready to perform the data  
transfer associated with a FCP_CMD.  
FCP_DATA  
FCP_RSP  
The data associated with an I/O operation.  
The Information Unit contains status and sense information  
FCP Command Information Unit  
Table 3-3 shows the FCP_CMNDInformation Unit (IU) that carries either a SCSI command to  
be executed or a task management request to be performed. It contains the values and control  
fields defined in its payload.  
3-2  
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FCP Constructs  
Table 3-3 FCP_CMND IU Format  
Byte Size Field Name Byte Number  
Description  
8
FCP_LUN  
FCP_CNTL  
FCP_CDB  
FCP_DL  
0 - 7  
Logical Unit Number  
4
8 - 11  
12 - 27  
28 - 31  
Control flags and bits for task/execution management  
SCSI command descriptor block  
Data Length  
16  
4
The FCP_LUNvalue format is described in Table 3-3 or the value is 0. The latter refers to the  
SESD on the local switch. The FCP_CNTLvalue is set to 1, 2 or 0 depending on whether  
READ DATA, WRITE DATA or neither is involved in the command. The FCP_CDBvalue  
contains the appropriate command descriptor. The FCP_DLfield contains a count of the  
maximum number of data bytes to be transferred to or from the target for the command.  
FCP Transfer Ready Information Unit  
The FCP_XFER_RDYInformation Unit contains SCSI-3 data delivery service parameters  
required by the initiator and must be transmitted preceding each read or write FCP_DATA IU.  
Note: The SESD does not generate this optional Information Unit.  
FCP Data Information Unit  
The FCP_DATAInformation Unit transfers the actual data.  
FCP Response Information Unit  
Table 3-4 shows the FCP_RSPthat carries the response status and sense information associated  
with a particular FCP_CMND.  
Table 3-4 FCP_RSP Format  
Byte Size Field Name  
Description  
8
4
4
4
4
m
n
Reserved  
Reserved  
FCP_STATUS  
FCP_RESID  
Status of the (linked/previous) request  
Residual Count  
FCP_SNS_LEN  
FCP_RSP_LEN  
FCP_RSP_INFO  
FCP_SNS_INFO  
Length of Sense Information (FCP_SNS_INFO)  
Length of Response Information (FCP_RSP_INFO)  
FCP Response Information  
SCSI Sense Information  
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FCP and SES Commands  
Table 3-5 shows the FCP_STATUSfield format.  
Table 3-5 FCP_STATUS Format  
Byte  
Bit  
7 .. 0  
7 .. 0  
7 .. 4  
3
Definition  
0
1
Reserved  
Reserved  
Reserved  
FCP_RESID_UNDER  
FCP_RESID_OVER  
FCP_SNS_LEN_VALID  
FCP_RSP_LEN_VALID  
SCSI status byte from the SCSI logical unit (not used)  
2
2
1
0
3
7 .. 0  
The reserved bits are set to 0 by the SESD. FCP_RESID_UNDERindicates that the FCP_RESID  
field is valid and contains the number of bytes expected to be transferred, but were not  
transferred. See Table 3-4. This bit is not used by SESD. FCP_RESID_OVERindicates that the  
FCP_RESIDfield is valid and contains the number of bytes that have been truncated because  
the FCP_DLwas not sufficient. See Table 3-3. This bit may be set by SESD.  
FCP and SES Commands  
Table 3-6 shows the commands supported by SESD.  
Table 3-6 Supported Operation Codes  
Command  
Operation Code  
Inquiry  
12h  
1Ch  
A0h  
03h  
1Dh  
00h  
Receive Diagnostics Results  
Report LUNs  
Request Sense  
Send Diagnostic  
Test Unit Ready  
The value of the FCP_LUNfield in FCP_CMNDspecifies the logical unit for the request in each  
command. The value of FCP_DLfield in FCP_CMNDspecifies whether there is any data  
parameter to be transferred to the SESD. The value should be 0 for command 1, 2, 3, 4 and 6.  
For command 5, the value may be 0 or the size of a diagnostic page whose page code is in the  
range of 80h through 85h.  
3-4  
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FCP and SES Commands  
Switch Diagnostics Pages  
Before each SCSI command is discussed in detail, the diagnostics pages are defined in  
Table 3-7. They are particularly relevant to two commands: Receive Diagnostic  
Resultsand Send Diagnostics. The switch SESD supports 7 diagnostics pages.  
Table 3-7 Diagnostics Pages  
Page Code  
00h  
Description  
Supported Diagnostics Pages  
Switch Page  
80h  
81h  
Sensor Table Page  
82h  
Fabric Page  
83h  
Neighborhood Table Page  
Fibre Channel Port Table Page  
Name Server Local Table Page  
84h  
85h  
Table 3-8 shows the page codes 80h through 85h which are vendor specific pages and are  
roughly mapped from the switch Management Information Base (MIB) Definition for v1.6a  
firmware.  
Table 3-8 Switch MIB Groups  
Page Code  
80h  
Switch MIB Group  
System Group, variables 1..8, 20, 21  
System Group, Sensor Table  
Fabric Group, variables 1, 2 and 8  
Fabric Group, Neighborhood Table  
Fibre Channel Port Table  
81h  
82h  
83h  
84h  
85h  
Name Server Local Table  
Supported Diagnostics Pages  
If requested using the Send Diagnosticor Receive Diagnostic Resultcommand, the  
SESD returns the response shown in Table 3-9  
Table 3-9 Page Code 0 Format – Supported Diagnostic Pages  
Byte/Bit  
7
6
5
4
3
2
1
0
0
1
Page Code = 00h  
Reserved  
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FCP and SES Commands  
Table 3-9 Page Code 0 Format – Supported Diagnostic Pages (Continued)  
Byte/Bit  
7
6
5
4
3
2
1
0
2
3
(MSB)  
Page Length = 7  
(LSB)  
4
00h  
80h  
81h  
82h  
83h  
84h  
85h  
5
6
7
8
9
10  
Switch Page  
If requested using the Send Diagnosticor Receive Diagnostic Resultcommand, the  
SESD returns the response shown in Table 3-10.  
Table 3-10 Switch Page Format  
Byte/Bit  
0
Field #  
Access  
na  
na  
na  
na  
ro  
7
6
5
4
3
2
1
0
na  
na  
na  
na  
0
Page Code = 80h  
Reserved  
1
2 .. 3  
Page Length = 404  
swValid  
4 .. 7  
8 .. 71  
Current_Date (in ASCII text)  
Boot_Date (in ASCII text)  
72 .. 135  
136 .. 199  
200 .. 263  
264 .. 327  
328 .. 391  
392 .. 395  
396 .. 399  
400 .. 403  
404 .. 407  
1
ro  
2
ro  
Firmware_Last_Updated_Date (in ASCII text)  
FLASH_Last_Updated_Date (in ASCII text)  
Boot_PROM_Last_Updated_Date (in ASCII text)  
Firmware_Version_Information (in ASCII text)  
Switch_Operational_Status  
3
ro  
4
ro  
5
ro  
6
ro  
7
rw  
ro  
Switch_Administrative_Status  
8
Diagnostics_Result  
9
ro  
Number_of_Sensors  
Note: na is not available, ro is read only and rw is read/write  
3-6  
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The field swValidis bit mapped and indicates which subsequent fields within the page are  
valid. The bit position for subsequent fields starts from 0, as indicated in the Field # column of  
Table 3-10. For example, if the fields: Current_Date, Boot_Dateand  
Number_of_Sensorsare valid, it contains the hex value of 0003h.  
Sensor Table Page  
If requested using the Send Diagnostic or Receive Diagnostic Result command, the SESD  
returns the response shown in Table 3-11.  
Table 3-11 Sensor Table Page Format  
Byte/Bit  
0
Field #  
na  
Access  
na  
7
6
5
4
3
2
1
0
Page Code = 81h  
Reserved  
1
na  
na  
2 .. 3  
4 .. 7  
na  
na  
Page Length = n - 3  
na  
na  
swNumEntries = i – specifies the number of entries received  
for bytes 8 -91, if the number is 5 there are 5 complete  
outputs for byte 8 - 91.  
8 .. 11  
na  
0
ro  
ro  
ro  
ro  
ro  
ro  
swValidity[0]  
12 .. 15  
16 .. 19  
20 .. 23  
24 .. 27  
28 .. 91  
..  
swSensorIndex[0]  
swSensorType[0]  
swSensorStatus[0]  
swSensorValue[0]  
swSensorInfo[0]  
1
2
3
4
... more instances of swSensorEntry (swValidity .. swSensorInfo) if applicable ...  
4 ro swSensorInfo[i-1]  
(n-64)..(n-1)  
Fabric Page  
If requested using the Send Diagnosticor Receive Diagnostic Resultcommand, the  
SESD returns the response shown in Table 3-12.  
Table 3-12 Format of Fabric Page  
Byte/Bit  
0
Field #  
na  
Access  
na  
7
6
5
4
3
2
1
0
Page Code = 82h  
Reserved  
1
na  
na  
2 .. 3  
4 .. 7  
8 .. 11  
na  
na  
Page Length = 20  
swValid  
na  
na  
0
ro  
swDomainID  
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FCP and SES Commands  
Table 3-12 Format of Fabric Page (Continued)  
Byte/Bit  
12 .. 15  
16 .. 19  
20 .. 23  
Field #  
Access  
7
6
5
4
3
2
1
0
1
2
3
ro  
ro  
ro  
PrincipalSwitchFlag  
NumberOfImmediateNeighbor  
NumberOfFabricISL_Entries  
Neighborhood Table Page  
If requested using the Send Diagnosticor Receive Diagnostic Resultcommand, the  
SESD returns the response shown in Table 3-13.  
Table 3-13 Neighborhood Table Page Format  
Byte/Bit  
0
Field #  
na  
Access  
na  
7
6
5
4
3
2
1
0
Page Code = 83h  
Reserved  
1
na  
na  
2 .. 3  
4 .. 7  
na  
na  
Page Length = n - 3  
na  
na  
swNumEntries = i – specifies the number of entries received  
for bytes 8. Note that each entry consists of swValidity[0] field  
through field 5.  
8 .. 11  
na  
0
rw  
ro  
ro  
ro  
ro  
ro  
ro  
swValidity[0]  
12 .. 15  
16 .. 19  
20 .. 23  
24 .. 27  
28 .. 31  
32 .. 35  
..  
swNbIndex[0]  
1
NswNbMyPort[0]  
swNbRemoteDomainID[0]  
swNbRemotePort[0]  
swNbBaudRate[0]  
swNbIslState[0]  
2
3
4
5
... more instances of swNbEntry (swValidity .. swNbIslState) if applicable ...  
0 - 5 ro swNbIslState[i-1]  
(n-4)..(n-1)  
Fibre Channel Port Table Page  
If requested using the Send Diagnosticor Receive Diagnostic Result command,  
the SESD returns the response shown in Table 3-14.  
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FCP and SES Commands  
Table 3-14 Fibre Channel Port Table Page Format  
Byte/Bit  
0
Field #  
na  
Access  
na  
7
6
5
4
3
2
1
0
Page Code = 84h  
Reserved  
1
na  
na  
2 .. 3  
4 .. 7  
na  
na  
Page Length = n - 3  
na  
na  
swNumEntries = i – specifies the number of entries received.  
Note: Each entry consists of swValidity[0] field through field 27.  
8 .. 11  
na  
0
rw  
ro  
ro  
ro  
ro  
rw  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
swValidity[0]  
12 .. 15  
16 .. 19  
20 .. 23  
24 .. 27  
28 .. 31  
32 .. 35  
36 .. 39  
40 .. 43  
44 .. 47  
48 .. 51  
52 .. 55  
56 .. 59  
60 .. 63  
64 .. 67  
68 .. 71  
72 .. 75  
76 .. 79  
80 .. 83  
84 .. 87  
88 .. 91  
92 .. 95  
96 .. 99  
100 .. 103  
104 .. 107  
swFCPortIndex[0]  
1
swFCPortType[0]  
2
swFCPortPhyStatus[0]  
swFCPortOpStatus[0]  
swFCPortAdmStatus[0]  
swFCPortTxWords[0]  
swFCPortRxWords[0]  
swFCPortTxFrames[0]  
swFCPortRxFrames[0]  
swFCPortTxC2Frames[0]  
swFCPortTxC3Frames[0]  
swFCPortRxLCs[0]  
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
swFCPortRxMcasts[0]  
swFCPortTooManyRdys[0]  
swFCPortNoTxCredits[0]  
swFCPortRxEncInFrs[0]  
swFCPortRxCrcs[0]  
swFCPortRxTruncs[0]  
swFCPortRxTooLongs[0]  
swFCPortRxBadEofs[0]  
swFCPortRxEncOutFrs[0]  
swFCPortRxBadOs[0]  
swFCPortRxC3Discards[0]  
swFCPortMcastTimedouts[0]  
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Table 3-14 Fibre Channel Port Table Page Format (Continued)  
Byte/Bit  
108 .. 111  
112 .. 115  
116 .. 119  
120 .. 123  
..  
Field #  
24  
Access  
7
6
5
4
3
2
1
0
ro  
ro  
ro  
ro  
swFCPortTxMcasts[0]  
swFCPortLipIns  
25  
26  
swFCPortLipOuts  
swFCPortLipLastAlpa  
27  
... more instances of swFCPortEntry (swValidity .. swFCPortTxMcasts) if applicable ...  
0 - 27 ro swFCPortLipLastAlpa[i-1]  
(n-4)..(n-1)  
Name Server Local Table Page  
If requested using the Send Diagnosticor Receive Diagnostic Resultcommand, the  
SESD returns the following response as shown in Table 3-15.  
Table 3-15 Format of Name Server Local Table Page  
Byte/Bit  
0
Field #  
na  
Access  
na  
7
6
5
4
3
2
1
0
Page Code = 85h  
Reserved  
1
na  
na  
2 .. 3  
4 .. 7  
na  
na  
Page Length = n - 3  
na  
na  
swNumEntries = i – Note that each entry consists of swValidity[0]  
field through field 10.  
8 .. 11  
na  
0
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
ro  
swValidity[0]  
12 .. 15  
swNsIndex[0]  
16 .. 19  
1
swNsPortType[0]  
20 .. 23  
2
swNsPortID[0]  
24 .. 31  
3
swNsPortName[0]  
32 .. 287  
288 .. 295  
296 .. 551  
552 .. 559  
560 .. 575  
576 .. 579  
580 .. 643  
...  
4
swNsPortSymbolicName[0]  
swNsNodeName[0]  
swNsNodeSymbolicName[0]  
swNsInitialProcessInitiator[0]  
swNsClassOfServices[0]  
swNsClassOfServices[0]  
swNsFc4Types[0]  
5
6
7
8
9
10  
... more instances of swNsLocalEntry (swValidity..swNsFc4Types) if applicable ...  
0 - 10 ro swNsFc4Types[i-1]  
(n-4)..(n-1)  
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Inquiry  
An SES Application Client may send an Inquirycommand to obtain information about a  
switch in the Fabric. The format of the FCP_CDBis shown in Table 3-16.  
Table 3-16 Inquiry Command Format  
Byte/Bit  
7
6
5
4
3
2
1
0
0
1
2
3
4
5
Operation Code = 12h  
Reserved  
CmdDt=0  
EVPD=0  
Page Code = 0  
Reserved  
Allocation Length  
Control = 0  
If the field, EVPD (Enable Vital Product Data) is set to 0 and the value of the page code is 0,  
the standard Inquiry Data is returned as shown in Table 3-17.  
Table 3-17 Inquiry Data Format  
Byte/Bit  
7
6
5
4
3
2
1
0
0
1
Peripheral Qualifier = 0  
Peripheral Device Type = 0Dh  
RMB=  
0
Reserved = 0  
2
3
ISO version = 0  
ECMA version = 0  
ANSI version = 3  
AERC  
=0  
TrmTsk=  
0
NormAC  
A=1  
Reserv Response data format = 2  
ed=0  
4
5
7
Additional Length = 31 (1Fh)  
Reserved  
Reser  
ved  
EncServ  
=1Bh  
VS = 0  
MultiP  
=1Bh  
MChngr ACKREQ Addr32  
Addr16  
=0  
=0  
Q=0  
=0  
7
RelAdr WBus32  
=0 =0  
Wbus16  
=0  
Sync=  
0
Linked= Trandis=  
CmdQu  
e=0  
VS=0  
0
0
8 ..15  
16. 31  
32. 35  
Vendor identification = ”STORAGETEK”  
Product identification = “Switch”  
Product revision level = “v{N}.{m}{p”” (where {N} is a single number designating the major  
release number, {m} is a single number designating the minor release number), and {p}  
is a single alpha character designating a patch. There may be a space indicating there’s  
no patch. For example, v1.5a  
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If the field, EVPD is set to 1, then the value of the page code may be set to one of the codes  
shown in Table 3-18.  
Table 3-18 Page Codes  
Page Code  
00h  
Description  
Supported vital product data pages  
Unit Serial Number Page  
Device Identification Page  
80h  
83h  
If the page code is set to 00h, the SESD will return codes shown in Table 3-19.  
Table 3-19 SESD Return Codes for 00h  
Byte/Bit  
7
6
5
4
3
2
1
0
0
1
2
3
4
5
6
Peripheral qualifier = 0  
Peripheral Device Type = 0Dh  
Page Code = 00h  
Reserved  
Page length = 3  
00h  
80h  
83h  
If the page code is set to 80h, the SESD will return codes shown in Table 3-20.  
Table 3-20 SESD Return Codes for 80h  
Byte/Bit  
7
6
5
4
3
2
1
0
0
Peripheral qualifier = 0  
Page Code = 80h  
Reserved  
Peripheral Device Type = 0Dh  
1
2
3
Page length = 24  
4
Product Serial Number = the switch World_wide Name in ASCII string format  
E.g. “10:00:00:60:69:00:01:b4 ”  
...  
27  
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If the page code is set to 83h, the SESD will return codes shown in Table 3-21.  
Table 3-21 SESD Return Codes for 83h  
Byte/Bit  
7
6
5
4
3
2
1
0
0
Peripheral qualifier = 0  
Page Code = 83h  
Reserved  
Peripheral Device Type = 0Dh  
1
2
3
Page length = 32  
Reserved = 0  
4
Code set = 2  
5
Reserved = 0  
Identifier type = 1  
6
Reserved = 0  
7
Identifier length = 28  
8
Identifier = Vendor Identification (8 bytes) + Product identification (16 bytes) +  
Product revision level (4 bytes)  
See Table 3-17.  
...  
35  
Receive Diagnostic Results  
An SES Application Client sends a Receive Diagnostic Resultscommand to return  
diagnostic or management data. The FCP_CDBformat is shown in Table 3-22.  
Table 3-22 Receive Diagnostic Results Command Format  
Byte/Bit  
7
6
5
4
3
2
1
0
0
Operation Code = 1Ch  
Reserved  
1
PCV  
2
Page Code  
3 .. 4  
5
Allocation Length  
Control = 0  
A Page Code Valid (PCV) bit of zero indicates that the most recent Send Diagnostic  
command defines the data returned by this command. A value of 1 indicates that the Page  
Code field defines the data to be returned for this command. The page codes and formats are  
defined in the “Switch Diagnostics Pages” section.  
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FCP and SES Commands  
Report LUNs  
An SES Application Client sends a Report LUNscommand to obtain the number of logical  
units (each is a switch in SCSI impersonation) in the Fabric. The CDBformat is shown in  
Table 3-23.  
Table 3-23 Report LUNs Command Format  
Byte/Bit  
0
7
6
5
4
3
2
1
0
Operation Code = A0h  
Reserved  
1 .. 5  
6 .. 9  
10  
Allocation Length  
Reserved  
11  
Control = 0  
The SESD reports the LUNs of associated switches with the format shown in Table 3-24.  
Table 3-24 Reported LUNs Format  
Byte/Bit  
0 .. 3  
7
6
5
4
3
2
1
0
LUN list length (n-7)  
4 .. 7  
Reserved  
LUN  
8 .. 15  
..  
..  
(n-7)..n  
LUN  
Request Sense  
An SES Application Client sends a Request Sensecommand to obtain sense data. The CDB  
format is shown in Table 3-25.  
Table 3-25 Request Sense Command Format  
Byte/Bit  
7
6
5
4
3
2
1
0
0
Operation Code = 03h  
Reserved  
1 .. 3  
4
5
Allocation length  
Control = 0  
The SESD returns a sense key of NO SENSEand an additional sense code of NO ADDITIONAL  
SENSE INFORMATION.  
3-14  
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FCP and SES Commands  
Send Diagnostic  
A SES Application Client can use a Send Diagnosticcommand to configure/diagnose a  
logical unit. After the command completion, the SES Application Client sends a Receive  
Diagnostic Resultscommand. See Table 3-22. The FCP_CDBformat is shown in  
Table 3-26.  
Table 3-26 Send Diagnostic Command Format  
Byte/Bit  
7
6
5
4
3
2
1
0
0
Operation Code = 1Dh  
Reserved  
1
PF  
Reserved  
selfTest  
DevOfL  
UnitOfL  
2
Reserved  
3 .. 4  
5
Parameter list length  
Control = 0  
A Page Format (PF) bit of 1 specifies that the Send Diagnosticparameters conform to the  
page structure as specified in SCSI-3 Primary Command (SPC), Revision 11a, X3T10/995D,  
working draft. A value of 0 specifies that all parameters are vendor specific. At present, the  
SESD only supports the vendor-specific page structures as defined in the “Switch Diagnostics  
Pages” section.  
The selfTest, DevOfLand UnitOfLbits are ignored by the SESD at present.  
The Parameter List Length field specifies the length in bytes of the parameter list that shall be  
transferred from the SES Application client to the SESD.  
Test Unit Ready  
An SES Application Client sends a Test Unit Readycommand to check if the logical unit  
is ready. The FCP_CDBformat is shown in Table 3-27.  
Table 3-27 Test Unit Ready Command Format  
Byte/Bit  
7
6
5
4
3
2
1
0
0
Operation Code = 00h  
Reserved  
1 .. 4  
5
Control = 0  
The SESD returns the status of GOODand CHECK CONDITIONand a sense key of NO SENSE  
and an additional sense code of NO ADDITIONAL SENSE INFORMATION.  
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FCP and SES Commands  
Reject  
The SESD issues a Rejectcommand to set status to Check Conditionand the appropriate  
values for the Sense Key (SK) field. Additional Sense Code (ASC) and Additional Sense Code  
Qualifier (ASCQ) values are as shown in Table 3-28.  
Table 3-28 Reject Command Format  
SK  
2
ASC  
04h  
35h  
35h  
1Ah  
20  
ASCQ  
Explanation  
0
0
2
0
0
0
Logical Unit not ready  
2
Enclosure Service failed  
2
Enclosure Service unavailable (memory allocation problem)  
Parameter List length error (too small or too big)  
Invalid command operation code  
5
5
5
20  
Logical Unit not supported (invalid LUN value in FCP_CDB)  
3-16  
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Chapter 4 Troubleshooting  
Introduction  
This chapter discusses the SEND DIAGNOSTICcommand error messages.  
License Reject  
A license reject is generated when the SES license key is improperly entered or is not  
installed.  
The following message is generated:  
Probable cause: Invalid Field  
Action: See the “Reject” section in Chapter 3 for more information.  
CHECK CONDITION  
CHECK CONIDITIONis generated when the SES Device (SESD) terminates an operation  
because an error was encountered. These error conditions can be from invalid operations,  
warning indications and failure conditions. The sense key and sense code describe the error.  
Invalid Field Errors  
ILLEGAL REQUEST is generated from any invalid fields in the CDB, from parameters of a  
SEND DIAGNOSTICcommand and from the CDB of a RECEIVE DIAGNOSTIC RESULTS  
command. The sense code identifies the location of the invalid fields, parameter or CDB.  
The following message is generated:  
Probable cause: Invalid Field  
Action: See the “Reject” section in Chapter 3 for more information.  
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Introduction  
4-2  
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Appendix A Glossary  
Application Client: The source object of the SCSI commands and destination for the  
command responses.  
Byte: A group of 8 bits.  
Command Descriptor Block: The structure of up to 16 bytes in length used to communicate  
commands from the application client to a device server.  
Critical Condition: An enclosure condition where one or more elements inside the enclosure  
have failed or are outside of operational parameters. The element failure makes normal  
operation of at least some elements in the enclosure impossible, although some of the  
elements inside the enclosure may be able to continue normal operation.  
Device: A mechanical, electrical or electronic part in an enclosure.  
Device Server: A logical unit object that executes SCSI tasks.  
Device Service Request: A request from an application client of SCSI commands to a device  
server.  
Device Slot: An insertion position in an enclosure for SCSI devices. The position provides  
power, signal and control connections for the SCSI device. The position may also provide  
protection, automatic insertion, device status LEDs, locking capability, and additional  
features to manage SCSI devices in the enclosure.  
Device Type: The device type or device model implemented by the device server.  
Domain_ID: The domain number uniquely identifies the switch in a Fabric. Normally the  
switch domain ID is automatically assigned by the principal switch and may be any value  
between 0 and 31. This number may also be assigned manually.  
Enclosure: The box, rack or box set that provide power, mechanical protection, external  
interfaces and cooling for the SCSI device(s).  
Enclosure Services: The services that establishes indictors and controls for the proper  
operation and maintenance of devices within the enclosure.  
Enclosure Services Device: A SCSI device that monitors and controls enclosure services.  
The switches imbedded port.  
Initiator: A SCSI device containing application clients that originate device service requests  
to be processed by the device servers.  
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A-1  
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Logical Unit: A target-resident entity that implements a device model and executes SCSI  
commands originated by an application client.  
Logical Unit Number: A device or element known by an enclosure that identifies it to the  
application client.  
Redundancy: The presence in an enclosure of one or more elements capable of automatically  
taking over the functions of a failed element.  
SCSI: Small Computer Systems Interface.  
SCSI Device: A device that is connected to a service delivery subsystem and supports the  
SCSI application protocol.  
Target: A SCSI device that receives SCSI commands and directs such commands to one or  
more logical units for execution.  
A-2  
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Index  
Device Slot A-1  
A
Device Type A-1  
Diagnostics Pages 3-5  
Domain_ID A-1  
Application Client A-1  
ASC Field 3-16  
ASCQ Field 3-16  
E
B
Enclosure A-1  
Bit  
Enclosure Services A-1  
Enclosure Services Device A-1  
Page Code Valid 3-13  
Byte A-1  
C
F
Code  
FCP Command, Information Unit 3-2  
FCP Data Information Unit Command 3-3  
FCP Response Information Unit Command 3-3  
Additional Sense 3-16  
Additional Sense Code Qualifier 3-16  
Sense  
NO ADDITIONAL SENSE INFORMATION  
FCP Transfer Ready Information Unit Command  
3-3  
3-14  
Command  
FC-PH Constructs 3-2  
Field  
FCP  
Data Information Unit 3-3  
Information Unit 3-2  
Response Information Unit 3-3  
Transfer Ready Information Unit 3-3  
Inquiry 3-11  
ASCQ 3-16  
SK 3-16  
I
Receive Diagnostic Results 3-13, 3-15  
Reject 3-16  
Initiator A-1  
Inquiry Command 3-11  
Inquiry Data 3-11  
Report LUNs 3-14  
Request Sense 3-14  
Send Diagnostic 3-15  
Test Unit Ready 3-15  
K
Command Descriptor Block A-1  
Constructs, FC-PH 3-2  
Key  
Sense 3-16  
No Sense 3-14  
Critical Condition A-1  
L
D
Logical Unit A-2  
Device A-1  
Logical Unit Number A-2  
Device Server A-1  
Device Service Request A-1  
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Index-1  
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P
Page  
Diagnostics 3-5  
Fabric 3-7  
Fibre Channel Port Table 3-8  
Neighborhood Table 3-8  
Sensor Table 3-7  
Supported Diagnostics 3-5  
Switch 3-6  
Page Code Valid Bit 3-13  
R
Receive Diagnostic Results Command 3-13,  
3-15  
Redundancy A-2  
Reject Command 3-16  
Report LUNs Command 3-14  
Request Sense Command 3-14  
S
SCSI A-2  
SCSI Device A-2  
Send Diagnostic Command 3-15  
Sense  
Additional Code  
Field  
ASC 3-16  
Additional Code Qualifier 3-16  
Sense Key 3-16  
SilkWorm  
Fabric Page 3-7  
Fibre Channel Port Table Page 3-8  
Neighborhood Table Page 3-8  
Sensor Table Page 3-7  
Switch Page 3-6  
SK Field 3-16  
Supported Diagnostics Pages 3-5  
T
Target A-2  
Test Unit Ready Command 3-15  
Index-2  
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Comment Sheet  
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