nStor NexStor 4200F Series, User Manual

Page: 133 / 174

Chapter 5 - Troubleshooting
Common Fibre Loop/Bus Problems
121
Host I/O Card “H0” or
“H1” Link LED is not
illuminated.
(continued) Faulty Host I/O Card. Replace the Host I/O Card with a
“known good” card. If a “known
good” card is not available, tr
swapping the two Host I/O cards (left
and right cards).
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 jumpers
JP4 are set to 2 Gb or 1 Gb
mode. Both cards must match.
• If there is a daisy-chain
expansion enclosure, its Disk
I/O Cards must match the
setting on the primary RAID
enclosure cards.
All disk devices must be 2 Gb drives if
the 2 Gb mode is selected. If 1 Gb
mode is selected the disk devices can
be 2 Gb or 1 Gb drives (a 2 Gb drive
will step down to 1 Gb mode).
Faulty Transceiver. 1) Verify that the transceiver are
functional in the Disk I/O card
(valid Link LED). 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 transceivers.
The Tx/Rx signals operate
independently. For example, the
transmit on one end is functioning
but the receive function could be
faulty.
For daisy-chain expansion
enclosures, a possible faulty
Fibre Channel data cable. Replace the Fibre Channel data cable
with a “known good” cable.
Faulty Disk I/O Card. Replace the Disk I/O Card with a
“known good” card. If a “known
good” card is not available, tr
swapping the two Disk I/O cards
(upper and lower cards).
Symptom Reason Solution
4200F.book Page 121 Thursday, January 23, 2003 2:47 PM