Recovering Bios - IBM TotalStorage Network Attached Storage 300G User Reference

Table 2. Light-path diagnostics (continued)
Lit LED on
diagnostics
panel Cause
PCI B An error occurred on PCI bus B. Either an
adapter in PCI slot 3, 4, or 5 or the system
board caused the error.
VRM One of the VRMs on the system board has
failed.
DASD1 SCSI channel A has failed.
DASD2 SCSI channel B has failed.

Recovering BIOS

If the BIOS has become corrupted, such as from a power failure during a flash
update, you can recover the BIOS using the boot block jumper and a BIOS flash
diskette.
Note: You can obtain a BIOS flash diskette from one of the following sources:
Action
1. Check the error log for additional
information.
2. If you cannot isolate the failing adapter from
the information in the error log, try to
determine the failing adapter by removing
one adapter at a time from PCI bus B (PCI
slots 3, 4, and 5) and restarting the
appliance after each adapter is removed.
If the problem persists, have the system
serviced.
Check the VRM failure LEDs on the system
board.
v If the VRM1 failure LED is on, have the
system serviced.
v If the VRM2 failure LED is on:
1. Turn off the appliance, reseat the VRM,
and restart the appliance.
2. If the problem persists, replace the VRM.
If the problem still persists, have the system
serviced.
1. If an amber LED on a hot-swap hard disk
drive is on, replace the hard disk drive.
2. Run the diagnostics programs. Replace any
identified failing device.
3. If the error log indicates a temperature
problem and the fans are working correctly,
have the system serviced.
If the problem still persists, have the system
serviced.
1. If an amber LED on a hot-swap hard disk
drive is on, replace the hard disk drive.
2. Run the diagnostics programs. Replace any
identified failing device.
3. If the error log indicates a temperature
problem and the fans are working correctly,
have the system serviced.
If the problem still persists, have the system
serviced.
Chapter 5. Troubleshooting
31