Quantum SNC 4500, Руководство пользователя

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SNC 450x User’s Guide 45
1 Start SNC Manager.
To start and use the interface, including how to access the version information, refer to Using the SNC
Manager Interface on page 35.
2 If an update is needed, download the update from
www.adic.com
.
Refer to Updating Firmware on page 33.
Component Check
Use this procedure to check system components. For more information on the commands used in this
procedure, refer to
Management Port Command Reference on page 51.
Checking SCSI Devices
1 Check SCSI devices to make sure they are all set to different SCSI IDs.
By default, the SNC SCSI ports use SCSI ID 7 so drives should use IDs 0 through 6 and 8 through 15.
2 Check the SCSI device power. Make sure the devices are powering up.
3 Watch the drive lights before, during, and after startup. Many drives have term power lights that should
be on before startup and turn off when system boots.
4 Verify the external terminator is the correct type and does not have damaged pins.
5 Check cable integrity. Check the cables for solid connections. Make sure they are screwed down.
Inspect cable ends for bent pins.
6 If termination is correct, and the problem persists, try drives one at a time with different cables, adding
drives and cables until the problem occurs. This helps pinpoint the drive or cable causing the problem.
7 Check with the manufacturer of SCSI device(s) for further troubleshooting methods.
If SCSI devices appear to be working order, move on to the SNC SCSI port section.
Checking the SNC SCSI Ports
1 Verify the SNC has its termination set properly. By default, termination is enabled .
2 Either through the SNC Manager or CLI, perform a SCSI bus scan on each SCSI port.
See SCSI Configuration Commands on page 54.
If no devices appear, re-check SCSI cables and termination. If garbage information appears, the
problem is most likely a bad SCSI cable or termination.
3 Check the internal cabling of the SCSI device.
LVD SCSI cable lengths are limited to 12.5 meters. Longer cable lengths can cause problems. Internal
cabling is also considered when calculating total cable length. For details, refer to
Connecting to the
Serial Port on page 18.
4 Some older SCSI devices improperly negotiate with the SNC SCSI port. If older devices are not showing
up, contact your service representative.
5 If all devices appear, invoke the ScsiTargets command several times on each SCSI port to verify that
the devices can be seen. If devices disappear and disappear, then appear again, the problem is most
likely a SCSI cable. For information on the
ScsiTargets command, refer to SCSITargets [port number]
on page 83.
If all devices appear and remain, move to the SNC internal configuration section.