Isolating Scsi Devices - ADIC Scalar 100 User Manual

3. If the ADIC Gateway's command prompt on the terminal is not diagmode >
place the ADIC Gateway in diagnostic mode (see "Diagnostic Command
Reference" on page 295).
4. Turn off the ADIC Gateway.
5. Draw a diagram of the devices and their connections to the SCSI channels.
6. Remove the cable from one attached SCSI device, and attach it as a loop
back cable to the ADIC Gateway.
7. Power on the ADIC Gateway.
8. When the ADIC Gateway finishes booting, enter the scsiChannelTest x,
y command from the service terminal (where 'x' and 'y' are the slot numbers
connected by the loopback cable) to perform a loop back test.
9. If the ADIC Gateway returns a FAILED status, the cable is faulty and must be
replaced.
10. If the ADIC Gateway returns a PASSED status, go to "Isolating SCSI devices"
and try to isolate bad devices on the SCSI bus.

Isolating SCSI devices

1. Restore the ADIC Gateway to normal operation (see "Restoring Normal
Mode" on page 296).
2. Perform this step for each SCSI device that was found missing in "Compare
List versus Physical Devices" on page 172.
3. Turn off the ADIC Gateway.
4. Remove all devices from the SCSI buses.
5. Attach ONLY the device in question to the SCSI channel it was originally
connected to (refer to the list made in "Check for Multiple SCSI IDs" on
page 173) using a known-good SCSI cable and terminators.
6. Turn on the ADIC Gateway and wait for it to finish booting.
7. Enter the scsiShow command from the service terminal and verify the
device's presence.
8. If the device is missing, then it needs to be replaced and/or serviced. Inform
the system administrator of any suspected bad devices found in this step.
Replace or remove any bad devices.
9. If the device is present, then perform a health check (see "Perform Health
Check" on page 159).
SCSI MAP
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