Troubleshooting A Tape Drive (Test 6 Or 7); Troubleshooting An Rz22 Or Rz23 Disk (Test 6 Or 7) - Digital Equipment VAXstation 3100 Maintenance Manual

(
Troubleshooting 51
2.16 Troubleshooting a Tape Drive (TEST 6 or 7)
This section describes bow to troubleshoot a TZ30 tape drive in the system box
or in the TK50Z expansion box. This section assumes you know how to read,
decipher, and understand the SCSI bus operation, its codes, and its address ID
settings. Refer to Section 2.15 ro learn about the SCSI bus operation if you
are not familiar with this style of bus. Otherwise, the nexl two paragraphs
explain th. e self-test and the system exerciser results for the tape drive. Check
the SCSI address ID of the tape drive and which bus it is on by using the
SHOW DEVICE comand.
Self-test results for the tape device should contain 01000001 in the SCSI
address ID S location. A code of FFFFFF05 indicates that the device is not
installed, not powered up, or faulty. A code of FFFFFFFF indicates that the
device was not tested because of a SCSI bus controller error. Any code other
than those previously listed indicates an error with the tape device, a cabling
problem, or an error with the SCSI controller on the MSC module. Run
the internal self-test on the TK.50Z expansion box described in Section 6.3.1
if there is a problem with the external tape device. Otherwise, replace the
internal TZ30 tape device, retest, then replace the MSC module if replacing
the TZ30 tape device did not fix the problem.
When running the system exerciser in Field Service mode with the
s~ecial
keyed tape cartridge installed, the code for the tape device shows that it is not
writable (5100.0001) during the first pass. However, the subsequent passes
should show that it is removable and writable (5300.0001) as long as the
cartridge has a good special key on it and the SCSI controller is operating
properly. So you must wait for the system exerciser to complete at least two
passes to see if the tape drive (address IDS in this case) is operating properly.
2.17 Troubleshooting an RZ22 or RZ23 Disk (TEST
6 or 7)
This section describes how to troubleshoot an RZ22 or RZ23 disk drive. This
section assumes you know how to read, decipher, and understand the SCSI
bus operation, its codes and its address ID settings. Refer to Section 2.15 to
learn about the SCSI bus operation if you are not familiar with this style of
bus. Otherwise, the next two paragraphs explain the self-test and the system
exerciser results for the RZ22 or RZ23 disk drive at SCSI address ID 2 and
3. Check the SCSI address ID of the disk drives and which bus they are on
by using the SHOW DEVICE comand.