Table 21. Storage controller troubleshooting (continued)
Problem indicator
Component
Possible cause
Possible solutions
Intermittent or sporadic
power loss to the
storage controller
Some or all
CRUs
Defective AC power
source or partially
plugged-in power
cord
1. Check the AC power
source.
2. Reseat all installed
power cables and
power supplies.
3. If applicable, check
the power
components.
4. Replace defective
power cords.
Power supply has
failed
Check for a Fault LED
on the power supply, and
replace the failed CRU.
Midplane has failed
Have the midplane
replaced (service
technician only).
Unable to access
drives
Drives and Fibre
Channel loop
Fibre Channel
cabling has failed.
Ensure that the Fibre
Channel cables are
undamaged and properly
connected.
RAID controller has
failed
Replace the RAID
controller.
GBIC has failed
1. Ensure GBIC is
seated properly.
2. Replace GBIC.
Random errors
Subsystem
Midplane has failed
Have the midplane
replaced (service
technician only).
Replacing hot-swap drives
Drive problems include any malfunctions that delay, interrupt, or prevent successful
I/O activity between the hosts and the hard disk drives. This section explains how to
replace a failed drive.
Attention:
Failure to replace the drives might result in loss of data. If you are
replacing a drive that is part of a RAID level 1 or RAID level 5 logical drive, ensure
that you install the replacement drive in the correct bay.
Use the following procedure to replace host-swap drives:
1. Check the hardware and software documentation that is provided with the
system to see if there are restrictions regarding hard-disk-drive configurations.
Some system Fibre Channel configurations might not allow mixing different drive
capacities or types within an array.
2. Check the storage-management software for recovery procedures for a drive
that has failed. Follow the steps in the software procedure before continuing
with this procedure.
3. Determine the location of the drive to remove.
Attention:
Never hot-swap a drive CRU when its green Activity LED is
flashing. Hot-swap a drive CRU only when its amber drive-fault LED is on and
not flashing, or when the drive is inactive with the green Activity LED on and not
flashing.
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