Technical data

Troubleshooting 13
Table 2–2 (Cont.) Locating a Failed Memory Bank
Memory Module
Configurations 8-Digit Error Code for MEM
16 Mbyte module 0 0 0 V V V V Z
4 and 8 Mbyte modules 0 0 0 0 X X Y Z
8 and 12 Mbyte modules 0 0 W W W X X Z
4 and 16 Mbyte modules 0 0 V V V V Y Z
12 and 16 Mbyte modules V V V V W W W Z
2.3 RX23 Diskette Drive Troubleshooting
The procedure for troubleshooting the RX23 diskette with the SCSI
adapter module is the same as troubleshooting the other drives on the
SCSI bus. You need to remember that the device name of the RX23 drive
is usually DKA500. The 5 indicates the SCSI ID and the A indicates the
RX23 is on the SCSI-A bus.
The diagnostics used to test the RX23 drive and the SCSI adapter module
are the self-test and the system exerciser.
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 fifth 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.