IBM totalstorage 326, User Reference

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Table 21. Storage controller troubleshooting (continued)
Problem indicator Component Possible cause Possible solutions
One or more green
LEDs off Power supply
CRUs Power cord
unplugged or
switches turned off Make sure that the
power cord is plugged in
and the power-supply
switches are turned on.
All drive CRUs Midplane failure Have the midplane
replaced (service
technician only).
Front panel Power supply
problem Make sure that the cords
are plugged in and
power supplies are
turned on.
Hardware failure If any other LEDs are on,
replace the midplane
(service technician only).
Battery Battery failure Replace the battery.
Cache active The cache is
disabled, the cache
has failed, battery
failure 1. Use the
storage-management
software to enable
the cache.
2. Replace the RAID
controller.
3. Replace the battery.
Host loop Host, managed hub,
or switch is off or
has failed 1. Check if host
managed hub or
switch is on.
2. Replace attached
devices that have
failed.
Fibre Channel cable
has failed Ensure that the Fibre
Channel cables are
undamaged and properly
connected.
GBIC has failed 1. Ensure GBIC is
seated properly.
2. Replace GBIC.
RAID controller has
no power or has
failed 1. Ensure that the unit
is powered on.
2. Replace RAID
controller.
Expansion loop Drives are
improperly installed
or not installed Ensure that the drives
are properly installed.
RAID controller has
no power or has
failed 1. Ensure that the unit
is powered on.
2. Replace the RAID
controller.
3542 drive failure Replace the drive.
Externally attached
expansion port
device has failed 1. Replace the drive.
2. Replace the
expansion unit GBIC
or Fibre Channel
cable.
Chapter 8. Troubleshooting
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