Service manual

Troubleshooting 13
Running a Self-Test
A self-test performs an inquiry of the drive and reports the status of
the drive and the SCSI adapter module. No read/write operations are
performed. The results are stored in the configuration table (T 50). To
run a self-test:
1. Enter TEST 7.
2. Enter TEST 50 to see the results.
Self-Test Results
A code of 00000001 in the sixth position (if RX23 is at SCSI ID 5) in
the SCSI-A bus status line indicates no errors. Example 2–2 shows an
example of SCSI-A bus codes in the configuration table.
If any errors are detected, one or two question marks are flagged in the
left column next to the SCSI-A mnemonic.
SCSI-A 2C2C.0001
FFFFFF05
Drive
00000001
FFFFFF03
FFFFFF05...
SCSI-A
Controller
FFFFFF05
Drive
00000001
FFFFFF05
Drive
00000001
off_line off_line
off_line
off_line
RX23
RZ23
Drive
RZ23
Drive
Drive
Controller
LJ-00735-TI0
Example 2–2 Self-Test Results on the SCSI-A or SCSI-B Bus
If a Self-Test Indicates an Error
The error may be on the RX23 drive, on the other drives on the SCSI-A
bus, or on the SCSI-A bus controller. To determine which device is faulty,
examine the status codes of the individual drives. The SCSI IDs are
numbered 0 through 7 from left to right (for example, the RZ23 disk drive
is located at SCSI ID 2 and the RX23 disk drive is located at SCSI ID 5).
Table 2–2 lists the normal status codes for each SCSI device available on
the SCSI bus.