Troubleshooting An Rrd40 Compact Disc Drive (Test 6) - Digital Equipment VAXstation 3100 Maintenance Manual

52 Troubleshooting
Self-test results for each disk drive should contain 00000001 in the SCSI
address ID 2 and/or ID 3 locations depending on how many disk drives are
installed. A code of FFFFFFO-' indicates that the device is not installed, not
powered up, or faulty. A code of FFPFFFFF 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 disk drive at that address ID
location, a cabling problem, or an error with the SCSI conttoller on the MSC
module.
When running the system exerciser in Field Service mode, the code for the
disk drive shows that it is writable and that no errors are present (2200.0001
or 3200.0001). Any error code other than those previously listed indicates an
error is most likely on the disk, but never rule out the possibility of
an
error
on the SCSI controller itself.
2.18 Troubleshooting an RRD40 Compact Disc
Drive (TEST 6)
This section describes how to troubleshoot an RRD40 compact disc drive
installed internally or installed in the - RRD40 compact-disc 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
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-tesl result · and I.he
:;ystem exerciser
results for the RRD40 compact disc drive
at SCSI address
ID 4. Check the SCSI address ID of the RRD40 drive and which bus it is on
by using the SHOW DEVICE comand.
Self-test results for the RRD40 drive should contain 0.5000001 in the SCSI
address ID 4 location. A code of FFFFFFOS indicates that the device is not
installed or not oowered uo. 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 compact disc drive, its
adapter board, a cabling problem, or an error with the SCSI bus controller on
the MSC module. The RRD40 and its adapter board in the system box are
one FRU and both must be replaced if an error is detected with the RRD40
drive. The RRD40 expansion box is one FRU (no replaceable FRUs inside)
and the whole box must be replaced if an error is detected with the RRD40
expansion box. Be sure that the SCSI bus terminator is connected to the last
expansion box on the daisy chain.
When nmning the system exerciser in Field Service mode with the RRD40
test disc installed, the code for the disc drive shows that it is removable and
that no errors are present (4100.0001). The test disc contains known errors
imbedded to test the error correction code (ECC) logic. However, any disc
can be installed to perform read testing on the RRD40. Any error code other