IBM totalstorage 326 User Reference page 132

120
Model 326 User's Reference
Table 22. Storage unit troubleshooting table (continued)
Problem Indicator Component
All green LEDs off All CRUs
Amber LED flashing Drive CRUs
One or more green Power supply
LEDs off CRUs
All drive CRUs
Several CRUs
Front panel
Possible Cause Possible Solutions
Subsystem power
1. Check that all expansion
is off
unit power cords are
plugged in and the
power switches are on.
2. If applicable, check that
the main circuit breakers
for the rack are turned
on.
AC power failure Check the main circuit
breaker and AC outlet.
Power supply Replace the power supply.
failure
Midplane failure Have the expansion unit
serviced.
Drive rebuild or No corrective action
identity is in needed.
process
Power cord Make sure the cord is
unplugged or plugged in and the switches
switches turned are turned on.
off
Midplane failure Have the midplane replaced
(service technician only).
Hardware failure Replace the affected CRUs.
If this does not correct the
problem, have the ESM
boards replaced, followed
by the midplane (service
technician only).
Power supply Make sure the cords are
problem plugged in and power
supplies are turned on.
Hardware failure If any other LEDs are on,
replace the midplane
(service technician only).