Qlogic QLA12160, Руководство по установке оборудования

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SCSI Problem Checklist 3 – Troubleshooting
3-2 DC8151101-00 B
3.4
SCSI Problem Checklist
■ Is the SCSI bus termination for the QLA12160 board set correctly (see
appendixes
A and B )?
■ Is the termination for all devices on the SCSI bus set correctly?
■ Were all SCSI devices powered up before you powered up the PC?
■ Does each device have a unique SCSI ID? Each device must have a unique
ID between 0 and 15. The QLA12160 board is set to SCSI ID 7 at the factory.
■ Are the cable lengths within limits? Be sure that the total length for cables
connected to the QLA12160 board does not exceed the length listed in
table 3-1 .
Table 3-1. Maximum Cable Length
Board and Mode Cable Length
QLA12160
point-to-point
15 nodes
single-ended Ultra mode
82 feet (25 meters)
39 feet (12 meters)
9.8 feet (3 meters)
a
4.9 feet (1.5 meters)
b
Table Notes
If you are mixing Ultra and non-Ultra SCSI devices, the total cable length cannot exceed the
maximum cable length established for Ultra SCSI devices.
a
For four or fewer devices connected to the board.
b
For up to six devices connected to the board.
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