7.13.3.2 Action
1. Replace the drive indicated by the failure message.
7.13.3.3 Symptom
Disk drive or CD-ROM drive fails to boot or is not responding to commands.
7.13.3.4 Action
Testthe drive response tothe probe-scsi-all command as follows:
1. At the system ok prompt, type:
ok reset-all
ok probe-scsi-all
2. If the SCSI device responds correctly to probe-scsi-all, a message similar
to the one shown in the probe-scsi output example on Section 7.1 “About
Diagnostic Tools”on page186 is printed out.
If the device responds and a message is displayed, the system SCSI controller has
successfully probed the device. This indicates that the main logic boardis
operating correctly.
a. If one drive does not respond to the SCSI controller probe but the others
do, replace the unresponsive drive.
b. Ifonly one internal diskdrive is configured with the system and the
probe-scsi-all test fails to show the device in the message, replace the
drive.
c. If the problem is still evident after replacing the drive, replace the main
logic board.
d. Ifreplacing both the disk drive and the main logic board does notcorrect
the problem, replace the associated UltraSCSI data cable and UltraSCSI
backplane.
228 Sun Enterprise 220R Server Service Manual ♦January 2000, Revision A