Sun Microsystems SPARCstation Voyager Service Manual page 52

1. At the ok prompt, type
See the following example:
ok probe-scsi
Target 3
Unit 0
If the internal disk drive responds and a message similar to the example above is
displayed, the system's SCSI controller has successfully probed the device. This
indicates that the CPU board is working properly.
If the disk drive does not respond:
2. Verify that all SCSI devices on the SCSI chain have a different SCSI address. The
internal disk drive is set to SCSI address 3. Do not assign SCSI address 7 to any
device. This address is reserved for the system SCSI controller.
3. If external SCSI devices are connected to the system, verify that all SCSI cables
and the SCSI terminator are connected securely. The SCSI terminator must be
connected to the last physical SCSI device in the chain.
4. Check the SCSI cables to make sure there are no bent pins.
5. After checking the previous causes and the problem persists, replace the
unresponsive SCSI device.
6. If the problem still occurs after replacing the SCSI device, replace the CPU board.
7. If replacing the SCSI device and the CPU board does not correct the problem,
replace the I/O board.
30 SPARCstation Voyager Service Manual • December 1994
probe-scsi
Disk TOSHIBA MK2326FB
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A10S