Fujitsu MHS2020AT User Manual

C141-F059-01EN  
MHS2060AT, MHS2040AT  
MHS2030AT, MHS2020AT  
DISK DRIVES  
MAINTENANCE MANUAL  
Revision History  
(1/1)  
Edition  
01  
Date  
Revised section (*1)  
(Added/Deleted/Altered)  
Details  
2002-07-15  
*1 Section(s) with asterisk (*) refer to the previous edition when those were deleted.  
C141-F059-01EN  
This page is intentionally left blank.  
Preface  
This manual describes the MHS2060AT, MHS2040AT, MHS2030AT and MHS2020AT 2.5-inch  
hard disk drives with a built-in controller that is compatible with the ATA interface.  
This manual explains, in detail, how to maintain the disk drives.  
This manual assumes that users have a basic knowledge of hard disk drives and their application in  
computer systems.  
This manual consists of the following two chapters:  
Overview of Manual  
CHAPTER 1  
Maintenance and Diagnosis  
This chapter explains MHS2060AT, MHS2040AT, MHS2030AT and  
MHS2020AT maintenance requirements, operation verification, and  
troubleshooting.  
CHAPTER 2  
Removal and Replacement Procedure  
This chapter explains the procedure for removing and replacing MHS2060AT,  
MHS2040AT, MHS2030AT and MHS2020AT.  
Abbreviations  
This section lists the abbreviated terms and their full words used in this manual.  
Index  
In this manual, disk drives may be referred to as drives, or devices.  
IBM PC-AT is a registered trademark of IBM (International Business Machines  
Corporation) of the United States of America.  
Conventions for Alert Messages  
This manual uses the following conventions to show the alert messages. An alert  
message consists of an alert signal and alert statements. The alert signal consists  
of an alert symbol and a signal word or just a signal word.  
The following are the alert signals and their meanings:  
This indicates a hazardous situation could result in  
minor or moderate personal injury if the user does  
not perform the procedure correctly. This alert  
signal also indicates that damages to the product or  
other property may occur if the user does not perform  
the procedure correctly.  
This indicates information that could help the user  
use the product more efficiently.  
C141-F059-01EN  
i
Preface  
In the text, the alert signal is centered, followed below by the indented message.  
A wider line space precedes and follows the alert message to show where the alert  
message begins and ends. The following is an example:  
(Example)  
Don’t install or remove a PCA or connect or disconnect a cable or  
connector plug when the drive is powered. This may give you an  
electric shock.  
The main alert messages in the text are also listed in the “Important Alert Items.”  
Operating Environment  
This product is designed to be used in offices or computer rooms.  
For details regarding the operating environment of use, refer to the Product  
Manual (C141-E171-01EN).  
Attention  
Please forward any comments you may have regarding this manual.  
To make this manual easier for users to understand, opinions from readers are  
needed. Please write your opinions or requests on the Comment at the back of  
this manual and forward it to the address described in the sheet.  
Liability Exception  
“Disk drive defects” refers to defects that involve adjustment, repair, or  
replacement.  
Fujitsu is not liable for any other disk drive defects, such as those caused by user  
misoperation or mishandling, inappropriate operating environments, defects in the  
power supply or cable, problems of the host system, or other causes outside the  
disk drive.  
ii  
C141-F059-01EN  
Important Alert Items  
Important Alert Messages  
The important alert messages in this manual are as follows:  
This manual uses the key alert messages given below.  
The following manual also contains notes on safety precautions:  
A hazardous situation could result in minor or moderate personal  
injury if the user does not perform the procedure correctly. Also,  
damage to the predate or other property, may occur if the user does  
not perform the procedure correctly.  
Task  
Maintenance  
Alert message  
Page  
Static, Damage  
1. Don’t install or remove a PCA or connect or disconnect  
a cable or connector plug when the drive is powered.  
This may give you an electric shock.  
1-2  
2. Keep away from mechanical assemblies in the unit  
during operation. This may cause injuries.  
3. Avoid dangerous detergent when the disk drive is  
cleaned.  
C141-F059-01EN  
iii  
Important Alert Items  
Task  
Maintenance  
Alert message  
Page  
Device damage  
1. Before touching a PCA or the drive, wear a wrist strap  
and perform the human body grounding to discharge  
static electricity from your body. This will prevent  
irreparable damage to the PCA and the head of the drive.  
1-2  
2. Don’t install or remove a PCA or connect or disconnect  
a cable or connector plug when the drive is powered.  
This will prevent electrical damage to the disk drive.  
3. Operating the disk drive with one or more PCA missing  
will be unpredictable. Only power the drive with all  
boards installed.  
4. Avoid any detergent which may cause short circuits  
when cleaning assemblies.  
5. Keep all vents open opened and unblocked. Avoid other  
conditions which may cause circuits to overheat.  
6. A ribbon type cable has one line marked. Ensure that  
this line is always connected to pin 1 of the cable  
connector.  
7. Do not apply excessive force to the cover under any  
circumstances. Doing so may cause irreparable damage  
to the cover.  
Device damage  
The DE is completely sealed. Do not open the DE in the  
field.  
1-3  
1-4  
Data corruption  
When asking for repair, save all data stored in the disk drive  
beforehand. Fujitsu Limited is not responsible for any loss  
of data during service and repair.  
Device damage  
The disk enclosure must never to be opened in the field.  
Opening the disk enclosure may cause irreparable damage.  
1-13  
iv  
C141-F059-01EN  
Important Alert Items  
Task  
Alert message  
Damage or Device damage  
Page  
2-2  
Maintenance  
1. Perform any removal after the system power is  
completely disconnected. The cable must not be  
disconnected and the screws that attach the drive must  
not be removed with the power ON.  
2. Do not move the drive until it comes to a complete stop  
(about 30 s after the power is turned OFF).  
3. Perform the human body grounding to discharge any  
static electricity from your body.(Be sure to wear a wrist  
strap)  
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Manual Organization  
MHS2060AT, MHS2040AT  
MHS2030AT, MHS2020AT  
1. Device Overview  
2. Device Configuration  
3. Installation Conditions  
4. Theory of Device Operation  
5. Interface  
DISK DRIVES  
PRODUCT MANUAL  
(C141-E171)  
6. Operations  
MHS2060AT, MHS2040AT  
MHS2030AT, MHS2020AT  
1. Maintenance and Diagnosis  
2. Removal and Replacement Procedure  
DISK DRIVES  
MAINTENANCE MANUAL  
<This manual>  
C141-F059-01EN  
viii  
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Contents  
CHAPTER 1 Maintenance and Diagnosis.....................................................1-1  
1.1 Maintenance............................................................................................1-2  
1.1.1 Rules for maintenance...........................................................................1-2  
1.1.2 Maintenance requirements....................................................................1-3  
1.1.3 Maintenance levels................................................................................1-5  
1.1.4 Disk drive revision number...................................................................1-6  
1.1.5 Tools and test equipment ......................................................................1-8  
1.1.6 Self-diagnostics.....................................................................................1-8  
1.1.7 Test........................................................................................................1-8  
1.2 Operation Confirmation ........................................................................1-10  
1.2.1 Operation test ......................................................................................1-10  
1.2.2 Diagnostic test.....................................................................................1-11  
1.3 Troubleshooting Procedure...................................................................1-11  
1.3.1 Troubleshooting procedure .................................................................1-11  
1.3.2 Troubleshooting disk drive replaced in field ......................................1-11  
1.3.3 Troubleshooting at factory..................................................................1-13  
CHAPTER 2 Removal and Replacement Procedure....................................2-1  
2.1 Spare Parts...............................................................................................2-2  
2.2 Disk Drive Removal................................................................................2-2  
C141-F059-01EN  
ix  
Contents  
Illustrations  
Figures  
Tables  
Figure 1.1 Disk drive revision number label 1-6  
Figure 1.2 Display of disk drive revision number  
Figure 1.3 Test flowchart 1-9  
1-7  
Table 1.1 Status register contents 1-10  
Table 1.2 Disposition for error register contents  
Table 1.3 System level and field troubleshooting  
1-10  
1-12  
Table 2.1 Model and parts numbers 2-2  
x
C141-F059-01EN  
CHAPTER 1 Maintenance and Diagnosis  
1.1  
1.2  
1.3  
Maintenance  
Operation Confirmation  
Troubleshooting Procedure  
This chapter describes the maintenance, diagnosis, operation check, and  
troubleshooting of the disk drive. The following are explained:  
Rules for regular maintenance and troubleshooting  
Display of maintenance level (field and factory)  
Display of machine revision number and number change in the field  
Tools and test devices needed for each maintenance level  
Standard testing for each maintenance level  
Recommended procedure for troubleshooting and fault diagnosis  
C141-F059-01EN  
1-1  
1.1 Maintenance  
Maintenance and Diagnosis  
1.1 Maintenance  
1.1.1 Rules for maintenance  
The following cautions must be observed to prevent injury during troubleshooting  
or maintenance.  
Static, Damage  
1. Don’t install or remove a PCA or connect or disconnect a cable  
or connector plug when the drive is powered. This may give  
you an electric shock.  
2. Keep away from mechanical assemblies in the unit during  
operation. This may cause injuries.  
3. Avoid dangerous detergent when the disk drive is cleaned.  
The following cautions must be observed to avoid damaging the disk drive during  
troubleshooting and maintenance.  
Device damage  
1. Before touching a PCA or the drive, wear a wrist strap and  
perform the human body grounding to discharge static  
electricity from your body. This will prevent irreparable  
damage to the PCA and the head of the drive.  
2. Don’t install or remove a PCA or connect or disconnect a cable  
or connector plug when the drive is powered. This will prevent  
electrical damage to the disk drive.  
3. Operating the disk drive with one or more PCA missing will be  
unpredictable. Only power the drive with all boards installed.  
4. Avoid any detergent which may cause short circuits when  
cleaning assemblies.  
5. Keep all vents open opened and unblocked. Avoid other  
conditions which may cause circuits to overheat.  
6. A ribbon type cable has one line marked. Ensure that this line  
is always connected to pin 1 of the cable connector.  
7. Do not apply excessive force to the cover under any  
circumstances. Doing so may cause irreparable damage to the  
cover.  
1-2  
C141-F059-01EN  
Maintenance and Diagnosis  
1.1 Maintenance  
1.1.2 Maintenance requirements  
(1) Preventive maintenance  
The disk drive needs no preventive maintenance, not even the air filter needs to be  
changed.  
Device damage  
The DE is completely sealed. Do not open the DE in the field.  
(2) Service life  
In situations where management and handling are correct, the life of the disk  
drive is five years when the DE surface temperature is less than 48°C. When the  
DE surface temperature exceeds 48°C, the life is five years or 20,000 hours of  
operation, whichever occurs first. Refer to Section 1.7 and 3.2 in Product  
Manual.  
(3) Exchangeable parts in field  
The PCA and the DE cannot be replaced separately in the field. Replace the  
whole disk drive.  
(4) Service system and repair  
Fujitsu Limited has a disk drive service system and repair facility. When making  
a request for repair or parts replacement, you should provide related information  
usually including:  
a) Model name of disk drive, part number (P/N), disk drive revision number,  
manufacture serial number (S/N), and date of manufacture of the disk drive  
b) Circumstances when the fault occurred  
Date of trouble occurred  
System configuration  
Environmental conditions (including temperature, humidity, and voltage)  
c) Fault history of the drive  
d) Details of the fault  
Description of the fault  
Issued command and specified parameters  
Status (Status/Error register)  
Interval of the fault  
Other information for fault diagnosis  
C141-F059-01EN  
1-3  
1.1 Maintenance  
Maintenance and Diagnosis  
Data corruption  
When asking for repair, save all data stored in the disk drive  
beforehand. Fujitsu Limited is not responsible for any loss of data  
during service and repair.  
(5) Notes on handling  
a.  
General notes  
a) Vibrations and shocks more severe than allowed will cause fatal damage to  
the device so be very careful. Be especially careful when unpacking the  
device.  
b) Do not leave the device in a dusty environment.  
c) Because the device uses GMR (giant MR head) and static sensitive CMOS  
semiconductors take the following precautions, be careful of the handling on  
the following points after the device is unpacked.  
Use an antistatic mat, etc. in the environment for handling the  
equipment. The worker should also be physically grounded (e.g.,  
wearing a wrist strap).  
Hold by the DE section, do not directly touch the PCA unit  
unnecessarily.  
b.  
Unpacking  
a) Use a flat workplace, find which side of the pack is up and be careful not to  
have the wrong side facing upwards. Do not place the device directly on a  
hard table, place it on something soft such as a rubber mat.  
b) Be careful not to apply any excessive force to the packed device when  
removing the shock absorbing material.  
c) When taking the device out of the antistatic bag, be especially careful not to  
apply any excessive force to the PCA or to the interface connector section.  
d) Never ever remove the DE seal label and screws and the DE cover.  
c.  
Installation  
a) When the power is ON, do not change the switch setting, or connecting, or  
disconnecting connectors.  
b) Do not move the device or disconnect connectors with the power ON or until  
the disk drive unit comes to a complete stop after the power is turned OFF  
(about 30 seconds).  
d.  
Packaging  
a) Place the device in an antistatic vinyl bag along with a desiccant (silica gel).  
1-4  
C141-F059-01EN  
Maintenance and Diagnosis  
1.1 Maintenance  
b) It is recommended that you use the shock absorption cushion material and  
packaging that contained the device when it was delivered by Fujitsu.  
If the same packaging material cannot be used, use a shock absorbent box  
that will transmit shocks directly to the device. When using this type of box,  
adequately protect the PCA surface and interface connector section.  
c) Place a label showing which side is up and clearly stating the notes on  
handling on the outside of the packaging.  
e.  
Delivery  
a) As a rule, deliver as it is packaged and keep the up side up.  
b) If delivering a single drive after it is unpacked, take it only a short distance.  
Also, use shock absorbent material to protect it against shock and vibration.  
Deliver an unpacked device in either of the allowable packed positions.  
Refer to Section 3.2 of the MHS2060AT, MHS2040AT, MHS2030AT,  
MHS2020AT Disk Drives Product Manual.  
f.  
Storage  
a) Store in dampproof packaging.  
b) Take care that the environmental requirements satisfy the non-operating  
environmental specifications described in Section 1.4 of the MHS2060AT,  
MHS2040AT, MHS2030AT, MHS2020AT Disk Drives Product Manual.  
c) To prevent condensation, do not subject the device to sudden changes of  
temperature.  
1.1.3 Maintenance levels  
Because of its compact size and special repair requirements, it is recommended  
that the whole disk drive be replaced. This section describes maintenance on two  
levels.  
(1) Field maintenance (disk drive replacement)  
Replacement at the user site.  
Disk drive replacement requires ordinary tools.  
Usually, the user, retailer, seller, or OEM trader will replace the drive.  
(2) Factory maintenance (parts replacement)  
Only Fujitsu can perform maintenance at this level.  
This includes maintenance training and assisting other OEM traders. The  
OEM trader usually assists the retailer and seller.  
Use the factory level tools and test equipment. This includes recommended  
spare parts and repairing or replacing various parts.  
C141-F059-01EN  
1-5  
1.1 Maintenance  
Maintenance and Diagnosis  
1.1.4 Disk drive revision number  
The disk drive revision number is a single alphabetic character followed by a  
single alphanumeric character. It is stuck on the DE and marked on the revision  
number label. Figure 1.1 shows the disk drive revision number label format.  
Disk drive revision number  
Firmware code/revision  
Figure 1.1 Disk drive revision number label  
(1) Revision number marking at delivery  
The machine revision number is indicated by crossing out up to the relevant  
number in the relevant alphabetic character row using = marks (see Figure 1.2).  
(2) Revision number change in the field  
When a part is replaced in the field or other modifications are made, the machine  
revision number may need to be changed. The level is indicated by crossing out  
the relevant number in the relevant alphabetic character row using ¡ marks (see  
Figure 1.2).  
(3) Firmware code and revision  
First 2-digit indicates a firmware code and rest 2-digit indicates its revision.  
Note:  
For a change of revision number after delivery, Fujitsu issues a  
“Change Request/Notice” and the disk drive revision number after  
the change. When a change is made at the user site, the revision  
number level should be changed as described above.  
1-6  
C141-F059-01EN  
Maintenance and Diagnosis  
Revision number mark when delivered  
1.1 Maintenance  
A2 Revision  
Revision number change in the field  
A3 Revision  
Figure 1.2 Display of disk drive revision number  
C141-F059-01EN  
1-7  
1.1 Maintenance  
Maintenance and Diagnosis  
1.1.5 Tools and test equipment  
At the field maintenance level, only ordinary hand tools are required for  
troubleshooting and repairing the disk drive. Special tools and test equipment is  
not required.  
Factory level tools and test equipment are beyond the scope of this manual.  
1.1.6 Self-diagnostics  
The disk drive has the following self-diagnostics. These self-diagnostics allow  
normal basic operation of an isolated disk drive can be checked.  
Initial self-diagnostics  
Offline self-diagnostics (EXECUTE DRIVE DIAGNOSTIC [DIAGNOSTIC]  
command)  
1.1.7 Test  
The disk drive test can be divided into the following three levels.  
Operating test (See Subsection 1.2.1, “Operating test.”)  
Diagnostic test (See Subsection 1.2.2, “Diagnostic test.”)  
Figure 1.3 shows the relationship between the test level and troubleshooting.  
Tables 1.1 and 1.2 show the check contents.  
1-8  
C141-F059-01EN  
Maintenance and Diagnosis  
1.1 Maintenance  
Start  
Yes  
Check the host system  
(Table 1.1)  
Operation test with the  
host computer or test  
equipment  
No  
Analyze the system  
related failure  
System normal?  
Yes  
Disk drive  
replacement or repair  
No  
Test acceptable?  
Yes  
No  
Disk drive normal?  
Yes  
Continue with the  
operation  
Diagnostic test with  
the host computer or  
test equipment  
No  
Test acceptable?  
Yes  
Test using voltage or  
temperature stress  
No  
Disk drive failure  
analysis (Table 1.2)  
Test acceptable?  
Yes  
No failure  
Figure 1.3 Test flowchart  
C141-F059-01EN  
1-9  
1.2 Operation Confirmation  
Maintenance and Diagnosis  
Table 1.1 Status register contents  
Status bit  
Contents  
BIT0=1  
BIT1, 2  
BIT3=1  
BIT4=1  
BIT5=1  
BIT6=0  
BIT7=1  
Shown in Table 1.2  
Normal.  
(1) Check whether vibration is transmitted because of the way the disk drive  
is mounted.  
(2) Check the power, cable, and connector.  
(3) If it is concluded that the disk drive is the cause, replace the disk drive.  
Table 1.2 Disposition for error register contents  
Error bit  
Method of disposition  
BIT0  
BIT1  
BIT4  
BIT6  
If it is concluded that the disk drive is the cause, replace the drive.  
BIT2  
BIT7  
(1) Check the status of the host, cable, and drive.  
(2) If it is concluded that the disk drive is the cause, replace the drive.  
1.2 Operation Confirmation  
1.2.1 Operation test  
When the host computer is processing data, the disk drive monitors disk drive  
operation errors including data, command, and seek errors. The host is notified of  
the error that the disk drive detected and the user is notified of its result.  
The user may notice intermittent and indefinite failures such as overlong  
execution time, abnormal noise, abnormal odor, or failures in particular processes.  
The failure reported in the operation test will need further investigation. To  
ascertain the cause of the disk drive failure reported, the disk drive can be  
replaced. Failures in the operation test are often not caused by the host system.  
For example, not having enough power supply reserve, a loose cable connection,  
no timing and mechanical reserves, or relationship with other systems.  
In normal operation, the disk drive itself or the host determines the processing  
(return or halt) following the detected failure state.  
1-10  
C141-F059-01EN  
Maintenance and Diagnosis  
1.3 Troubleshooting Procedure  
To troubleshoot the failure reported in the test at this level, accurately reproduce  
the condition that caused the failure. Then, by replacing the disk drive, try to  
separate the fault from the other sections of the disk drive host system.  
1.2.2 Diagnostic test  
The diagnostic test is used to separate a confirmed disk drive failure to a disk  
drive subassembly or to check the disk drive performance. A test of this level  
usually includes a specific disk drive function or concentrated execution of a  
group of functions. The test is usually performed by a factory engineer and not  
where the failure was reported. The disk drive is tested using another host  
computer or test equipment.  
To troubleshoot the disk drive failure in the diagnostic test, the engineer will  
reproduce the failure condition. The engineer then isolates the failure to a  
subassembly or part of the disk drive.  
The procedures used in a test of this level great depend on the test equipment  
used. It is beyond the range of this manual.  
1.3 Troubleshooting Procedure  
1.3.1 Troubleshooting procedure  
This section describes the troubleshooting procedures for a disk drive failure at  
field maintenance level described in Subsection 1.1.3.  
In this section, troubleshooting is made to isolate the reported failure to the disk  
drive or a host system. Usually, troubleshooting is necessary only when a cause  
of failure is uncertain or unknown. When a cause of failure is clear (for example,  
abnormal sound in the DE or burnt parts on the PCA), a level of troubleshooting  
is low.  
1.3.2 Troubleshooting disk drive replaced in field  
It is recommended that the whole drive be replaced in maintenance of this level.  
If replacing the drive corrects the fault, return the old drive to the factory for  
testing and repair. If the new drive shows the same fault as the one that was  
removed, the failure is elsewhere in the system.  
System level troubleshooting, shown in Table 1.3, is performed at the user site to  
isolate the reported failure to the disk drive or system.  
C141-F059-01EN  
1-11  
1.3 Troubleshooting Procedure  
Maintenance and Diagnosis  
Table 1.3 System level and field troubleshooting  
Recommended work  
Check to be made  
DC power voltage  
level  
Confirm that the DC power voltage is within ±5% of the standard value.  
When measured at pins 41 and 42 of the power supply connector, the +5  
VDC must be 4.75 to 5.25 VDC.  
DC power ripple  
noise  
Check that the maximum ripple at +5 VDC power is less than 100 mV  
peak to peak and 200 mV peak to peak respectively.  
Power-interface  
cable connection  
Confirm that the AT interface cable is properly connected at the disk  
drive, power supply section, and control unit.  
Switch setting  
System cable  
Confirm that the switch on the disk drive control PCA is set for normal  
operation with the host computer. Refer to Section 3.4 of the  
MHS2060AT, MHS2040AT, MHS2030AT, MHS2020AT Disk Drives  
Product Manual for switch setting.  
Confirm that all cable connections throughout the system correctly  
connected.  
System diagnostic To further isolate the failure, if it can be done, execute the system level  
test  
diagnostic routine described in the host computer manual.  
Intermittent or  
indefinite error  
Check the AC voltage level at the power supply section and recheck the  
DC voltage level at the disk drive power supply connector.  
If the AC voltage level is abnormal, or if there is a lot of electrical noise,  
notify the user.  
If the DC voltage level is unstable, replace the power supply section.  
If possible, replace the disk drive. If the fault remains, the disk drive is  
not the case. For suggestions to isolate the failure further, refer to the  
hardware and software manuals provided with the system.  
1-12  
C141-F059-01EN  
Maintenance and Diagnosis  
1.3 Troubleshooting Procedure  
1.3.3 Troubleshooting at factory  
When the trouble is recovered by replacing the drive at field (Subsection 1.3.2),  
troubleshoot the replaced drive to isolate the trouble to the subassembly parts.  
To shorten the troubleshooting time and repairing time, gather the data, such as  
environmental data and other information, from the user and then return the failed  
drive to the factory with the media defect list to repair.  
At the factory, user environment is made and a reappearance test is performed.  
To reappearance a same trouble at user, the failed drive is connected to the host  
system. If no trouble occurs by the normal test, the reappearance test is  
performed by adding the voltage/temperature load using a disk drive tester or  
tools according to the user environment.  
When a trouble reappeared, troubleshoot the cause of failure. Then, replace the  
failed unit or parts.  
As this level maintenance is made by a factory, this maintenance level is beyond  
the scope of this manual.  
Device damage  
The disk enclosure must never to be opened in the field. Opening  
the disk enclosure may cause irreparable damage.  
C141-F059-01EN  
1-13  
This page is intentionally left blank  
CHAPTER 2 Removal and Replacement Procedure  
2.1  
2.2  
Spare Parts  
Disk Drive Removal  
This chapter explains the procedure for removing and replacing the disk drive. It  
is assumed that the reader has a thorough knowledge of replacing the complete  
disk drive and replacing the power-interface cable.  
When carrying out these procedures, note the following items.  
Be sure to wear a wrist strap when removing the disk drive from the host  
system.  
The disk drive must have been removed from the host system.  
A power-interface cable to the disk drive must be disconnected.  
Mounting is done by reversing the steps for removal.  
To carry out maintenance properly, observe the following:  
Place removed screws and other parts where they will not get lost or  
damaged.  
Keep a record of all maintenance work.  
Tighten screws securely but not excessively.  
Before touching the PCA, perform the FG (frame ground) to discharge any  
static electricity from your body. This ensures that the worker will not  
electrically damage the PCA.  
Do not push the DE cover under any circumstances.  
C141-F059-01EN  
2-1  
2.1 Spare Parts  
Removal and Replacement Procedure  
2.1 Spare Parts  
See Table 2.1 for the model and parts numbers to order the replacement disk  
drive.  
Table 2.1 Model and parts numbers  
Model  
Part number  
Formatted  
capacity  
Mounting screw  
M3 (depth 3)  
MHS2060AT  
MHS2040AT  
CA06272-B042  
60 GB  
40 GB  
CA06272-  
B83100DX  
MHS2030AT  
MHS2020AT  
CA06272-B022  
30 GB  
20 GB  
CA06272-  
B82200DY  
2.2 Disk Drive Removal  
The method and procedures to demount the disk drive to check the jumper  
terminal, change the jumper position, or replace the device differ depend on the  
system cabinet structure. Therefore, for actual working procedures, the specific  
conditions necessary for each system must be determined. The general removal  
procedures, with notes, is as follows.  
a) Disconnect the power-interface cable.  
b) Remove the screws that attach the drive and remove the drive from the  
system cabinet.  
c) When storing or transporting the drive, pack it an antistatic bag.  
To protect the device from damage and prevent the worker getting hurt, observe  
the following cautions and precautions in Subsection 1.1.1.  
Damage or Device damage  
1. Perform any removal after the system power is completely  
disconnected. The cable must not be disconnected and the  
screws that attach the drive must not be removed with the  
power ON.  
2. Do not move the drive until it comes to a complete stop (about  
30 s after the power is turned OFF).  
3. Perform the human body grounding to discharge any static  
electricity from your body. (Be sure to wear a wrist strap)  
2-2  
C141-F059-01EN  
Acronyms and Abbreviations  
A
H
ABRT  
AC  
AIC  
Aborted command  
Alternating current  
Automatic idle control  
HA  
HDD  
Host adapter  
Hard disk drive  
AMNF Address mark not found  
I
ATA  
AT attachment  
IDNF  
IRQ14  
ID not found  
Interrupt request 14  
AWG  
American Wire Gauge  
B
L
BBK  
BIOS  
Bad block detected  
Basic input-output system  
LED  
Light emitting diode  
M
C
MB  
Mega-byte  
CORR  
CH  
CL  
CM  
CMOS  
Corrected data  
MB/s  
MPU  
MTBF  
MTTR  
Mega-byte per seconds  
Micro processor unit  
Mean time between failures  
Mean time to repair  
Cylinder high register  
Cylinder low register  
Command register  
Complementary  
metal-oxide semiconductor  
Current sense register  
Contact start/stop  
O
CSR  
CSS  
CY  
OEM  
Original equipment manufacture  
Cylinderregister  
P
D
PCA  
PIO  
P/N  
Printed circuit assembly  
Programmed input-output  
Parts number  
dBA  
DC  
DE  
dB A-scale weighting  
Direct current  
Disk enclosure  
DH  
Device/head register  
Drive ready  
Data request bit  
Drive seek complete  
Drive write fault  
R
DRDY  
DRQ  
DSC  
DWF  
RLL  
Run-length-limited  
S
SA  
SC  
SG  
SN  
ST  
System area  
Sector count register  
Signal ground  
Sector number register  
Status register  
E
ECC  
ER  
ERR  
Error checkingand correction  
Error register  
Error  
S/N  
Serial number  
F
T
FR  
Features register  
TPI  
Tracks per inches  
TR0NF Track 0 not found  
Typ Typical  
G
GB  
Giga byte  
C141-F059-01EN  
AB-1  
Acronyms and Abbreviations  
U
V
UNC  
Uncorrectable ECC error  
VCM  
Voice coil motor  
AB-2  
C141-F059-01EN  
Index  
D
N
Dampproof packaging 1-5  
Delivery 1-5  
revision number marking 1-6  
Diagnostic test 1-11  
Disk drive  
Notes  
general 1-4  
on handling 1-4  
O
replaced, troubleshooting 1-11  
replacement 1-5  
revision number 1-6  
revision number label 1-6  
Offline self-diagnostics 1-8  
Operation  
configuration 1-10  
test 1-10  
Disposition for error register contents 1-10  
P
E
Packaging 1-4  
dampproof 1-5  
Parts  
Exchangable parts in field 1-3  
F
numbers 2-2  
replacement 1-5  
Preventive maintenance 1-3  
Factory  
maintenace 1-5  
troubleshooting 1-13  
Field  
R
exchangable parts 1-3  
maintenance 1-5  
Removal and replacement procedure 2-1  
Revision, firmware code 1-6  
Revision number  
revision number change 1-6, 1-7  
troubleshooting 1-12  
Firmware code and revision 1-6  
change in the field 1-6, 1-7  
mark when delivered 1-6, 1-7  
Rules for maintenance 1-2  
G
General notes 1-4  
S
Self-diagnostics 1-8  
initial 1-8  
H
Handling, notes 1-4  
offline 1-8  
Service  
life 1-3  
I
system and repair 1-3  
Spare parts 2-2  
Status register contents 1-10  
Storage 1-5  
Initial self-diagnostics 1-8  
Installation 1-4  
L
System level 1-12  
and field troubleshootng 1-12  
Levels, maintenance 1-5  
T
M
Test 1-8  
Maintenance 1-1  
levels 1-5  
requirements 1-3  
Maintenance and diagnosis 1-1  
Model 2-2  
equipment 1-8  
flowchart 1-9  
Tools 1-8  
C141-F059-01EN  
IN-1  
Index  
Troubleshooting  
at factory 1-13  
disk drive replaced in field 1-11  
procedure 1-11  
system level and field 1-12  
U
Unpacking 1-4  
IN-2  
C141-F059-01EN  
READER’S COMMENT FORM  
Your comments or suggestions on this document are cordially solicited. For any comments and suggestions you  
may have, please complete and submit this form to your FUJITSU representative. The comments and  
suggestions will be used in planning future editions. Thank you for your cooperation.  
MHS2060AT, MHS2040AT  
MHS2030AT, MHS2020AT  
DISK DRIVES  
Date issued:  
Manual name:  
MAINTENANCE MANUAL  
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C141-F059-01EN  
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