Digital Equipment RW504-ZA, Service Manual

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Figure 4–4 Information and Tests Through the SCSI Bus
When troubleshooting through the SCSI bus, refer to the following information:
• Ordering information for Offline Diagnostics for Optical Library Products
located in Appendix B.
This offline diagnostic, DOSDASS2, can be used to access the above
information through the SCSI bus.
In addition, refer to the following tables:
Request Sense Command Tables (Table A–4)
This table shows error information and information about the state of
the autochanger after an error has occurred, which is returned when a
Request Sense command is issued through the SCSI bus.
Log Sense Command Table (Table 4–2)
This table shows the error and move information which is stored in
various logs during autochanger operation and when running internal
diagnostics.
4.9 Diagnostics
Several diagnostic programs and tests are available for the disk library. This
section gives information on how to run these tests/programs or where to find this
information.
The main type of diagnostic available for the disk library are Internal
Diagnostics.
Troubleshooting and Diagnostics 4–31