Fujitsu MHS2020AT User Manual download pdf (Page 25)

Maintenance and Diagnosis 1.3 Troubleshooting Procedure

C141-F059-01EN 1-11

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.

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Fujitsu MHS2020AT User Manual Page 25