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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.
Summary of Contents for SNC 4500
Page 1: ...www adic com ADVANCED DIGITAL INFORMATION CORPORATION SNC 450xUser sGuide...
Page 6: ...vi Contents...
Page 20: ...14 Getting Started Figure 4 Scalar 100 with Four LTO 1 or SDLT Drives...
Page 23: ...SNC 450x User s Guide 17 Figure 6 Scalar 100 with Four LTO 2 Drives...
Page 30: ...24 Getting Started...
Page 46: ...40 Using the SNC Manager Interface...
Page 112: ...106 Removal and Replacement Procedures...
Page 116: ...110 iSCSI Performance Tuning...
Page 119: ...SNC 450x User s Guide 113 BSMI Notice...
Page 120: ...114 Regulatory Notices...