Matrox DigiSuite LE, Installation Manual, Page: 108 / 140

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Chapter 6, DigiSuite LE Troubleshooting
Storage
General SCSI problems
Possible cause 1 SCSI devices not detected
The SCSI BIOS may not have detected
your SCSI devices.
Possible cause 2 SCSI chain setup The SCSI chain must be the correct length and
properly terminated for your stripe set to perform optimally.
Solution Check the SCSI BIOS
To check your SCSI BIOS configuration:
1
Press
CTRL+A
when prompted during computer start-up to enter
the SCSI BIOS.
2
Make sure your SCSI devices are detected.
3
If your SCSI devices are detected, make sure each hard drive has a
unique SCSI ID number—other than seven, which is usually
reserved for the SCSI controller. If your SCSI devices aren’t
detected, your problem lies with the SCSI controller or SCSI
cable.
Solution 1 Use cable of correct length Observe the following limitations
when choosing SCSI cable length:
q Up to four single-ended (or non-differential) Ultra SCSI devices
(including the SCSI controller) connected to a cable no longer
than nine feet
q Five to eight single-ended Ultra SCSI devices connected to a cable
no longer than four-and-a-half feet.
q You can attach up to 15 High-Voltage Differential module (HVD)
SCSI devices to a cable 75 feet in length.
q
Finally, if you’re using a Low-Voltage Differential (LVD) Ultra2
SCSI adapter, you can connect a single LVD SCSI device to a
cable up to 75 feet in length, or you can connect 15 LVD SCSI
devices to a cable up to 36 feet long.
Solution 2 Terminate your SCSI connections
Each end of the SCSI chain
must be properly terminated, which depends on the type of hard drive
you have. Consult your hard drive documentation for termination
instructions.