Fujitsu MAY2036RC User Manual download pdf (Page 77)

6.4 Troubleshooting Procedures

C141-E230 6-13

6.4.3 Troubleshooting at the repair site

For maintenance at this level, we recommend additional testing of the disk drive and signal checking.

The sense data posted from the HDDs help with troubleshooting. This sense data makes the error type clear

(functional, mechanical, or electrical error). Chapter 7 error analysis by sense data, and gives

supplementary information on finding the error cause (faulty part).

Table 6.3 lists how to detect a faulty disk drive subassembly. This fault finding requires a working

host computer or disk drive test equipment to recreate the error conditions.

If the detected error cannot be recreated in an ordinary test, disk drive conditions can be changed to

force the error to recur. This is done by changing the DC voltage or the ambient temperature of the

disk drive.

If the error does not recur with changed conditions, the disk drive is not faulty. If no error occurs in

the disk drive test, notify the user of the test results, and find out from the user the environment

conditions where the disk drive is used.

Table 6.3 Disk drive troubleshooting

Item Recommended action

Frequent or repeated seek errors Collect sense data, and see Chapter 7.

Replace the disk drive, and check that the test method is correct. If the

error recurs, it is likely that the disk drive is normal but the test method

is incorrect.

Intermittent or nonfatal errors Replace the disk drive, and check that the test method is correct. If the

error recurs, it is likely that the disk drive is normal but the test method

is incorrect.

To check performance, change the disk drive conditions by changing

the voltage or temperature.

If the disk drive error recurs or a possibly faulty part is found by troubleshooting, return the complete

disk drive to the factory for repair. A media defect list must be included with the disk drive returned

to the factory.

If the possibly faulty part is the disk enclosure, return the whole disk drive to the factory for repair.

Also if a clear error (erroneous servo track information or noisy drive) is detected in the disk

enclosure, return the whole disk drive to the factory. A media defect list must be included with the

disk drive returned to the factory.

Damage

1. Never remove any labels from the drive.

2. Never open the disk enclosure for any reason. Doing so will void

any warranties.

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 93 94

No comments

Fujitsu MAY2036RC User Manual Page 77