IBM totalstorage 326 User Reference page 127

Table 21. Storage controller troubleshooting (continued)
Problem indicator Component
One or more green Power supply
LEDs off CRUs
All drive CRUs
Front panel
Battery
Cache active
Host loop
Expansion loop
Possible cause Possible solutions
Power cord Make sure that the
unplugged or power cord is plugged in
switches turned off and the power-supply
switches are turned on.
Midplane failure Have the midplane
replaced (service
technician only).
Power supply Make sure that the cords
problem are plugged in and
power supplies are
turned on.
Hardware failure If any other LEDs are on,
replace the midplane
(service technician only).
Battery failure Replace the battery.
The cache is 1. Use the
disabled, the cache
has failed, battery
failure
2. Replace the RAID
3. Replace the battery.
Host, managed hub, 1. Check if host
or switch is off or
has failed
2. Replace attached
Fibre Channel cable Ensure that the Fibre
has failed Channel cables are
undamaged and properly
connected.
GBIC has failed 1. Ensure GBIC is
2. Replace GBIC.
RAID controller has 1. Ensure that the unit
no power or has
failed 2. Replace RAID
Drives are Ensure that the drives
improperly installed are properly installed.
or not installed
RAID controller has 1. Ensure that the unit
no power or has
failed 2. Replace the RAID
3542 drive failure Replace the drive.
Externally attached 1. Replace the drive.
expansion port 2. Replace the
device has failed
Chapter 8. Troubleshooting
storage-management
software to enable
the cache.
controller.
managed hub or
switch is on.
devices that have
failed.
seated properly.
is powered on.
controller.
is powered on.
controller.
expansion unit GBIC
or Fibre Channel
cable.
115