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Table 33. Symptom-to-FRU index (continued)
Problem
indicator
All green LEDs
are off
Amber LED is
flashing
138
IBM System Storage DS4200 Express Storage Subsystem: Installation, User's and Maintenance Guide
Component
Possible cause
All CRUs
Subsystem power is
off
AC power failure
Power supply failure Replace the power supply.
Drive CRUs
Drive identity is in
(Fault LED lit)
process
RAID controller
A fibre channel loop
port bypass
initialization process
(LIP) is being
generated in the
drive loop due to a
faulty component.
Controller drive
The enclosure
port bypass
speed was set to 4
LED
Gbps but the SFP
inserted in the
controller drive SFP
port does not
operate at 4 Gbps.
General Fault
An intermittent
LED (located
failure in the
on the front of
DS4200 Express
the storage
subsystem
subsystem)
configuration. The
problem could be
directly related to
the hardware in the
configuration (hard
drive or bad cable)
or indirectly related
to the DS4200
Express subsystem
configuration (such
as a fibre channel
host bus adapter
failure in the host
server or the fibre
channel switch in
the SAN causing
LUNs to be on a
non-preferred path.)
Possible solutions
Check that all storage subsystem
power cables are plugged in and
the power switches are on. If
applicable, check that the main
circuit breakers for the rack are
powered on.
Check the main circuit breaker
and AC outlet.
No corrective action needed.
Use the Read Link Status
window in the Storage Manager
Client Subsystem Management
window and the storage
subsystem event logs to isolate
the faulty component.
Use the Recovery Guru menu
function in the Storage Manager
Client Subsystem Management
window to verify the problem and
replace the SFP with a 4 Gbps
SFP.
Use the Recovery Guru menu
function in the Storage Manager
Client Subsystem Management
window to diagnose the problem.
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