Rackable Systems OMNISTOR 4000f SERIES, User Manual

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Chapter 5 - Troubleshooting
Common Fibre Loop/Bus Problems
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Common Fibre Loop/Bus Problems
Fibre loop or bus problems can usually be attributed to cabling issues, transceivers, speed
mode setting or possibly a faulty Disk I/O card. Refer to the chart below to review
troubleshooting and fault isolation procedures to assist you in identifying the suspect
component or problem, and the possible solutions.
Symptom Reason Solution
Disk I/O Card “P1” or
“P2” Link LED is not
illuminated. Bus speed mode setting not in
agreement. 1) Verify that:
• Both Disk I/O Cards jumper JP4
setting are in either 2 Gb or 1 Gb
mode.
• Host HBA is set to the same speed
mode as the Disk I/O Cards. It is
not recommended to use the auto
setting of the HBA speed mode.
Manually set the speed mode.
All disk devices must be 2 Gb drives if the
2 Gb mode is selected on the DIsk I/O
Card and Host HBA. If 1 Gb mode is
selected the disk devices can be 2 Gb or 1
Gb drives.
Faulty Transceiver. 1) Verify that the transceiver are functional
in the Disk I/O card and the Host
HBA. You may wish to swap the
transceiver for a “known good”
transceiver.
2) Ensure that both the transmit and
receive functions are operational on
both the Disk I/O Card and Host HBA
transceivers. Transceivers operate
independently for transmit and receive.
In other words the transmit on one end
is functioning but the receive function is
faulty.
Faulty Fibre Channel data cable. Replace the Fibre Channel data cable with a
“known good” cable.