IBM System Storage DS5020 Installation, User's, And Maintenance Manual page 191

Table 22. Symptom-to-FRU index (continued)
Problem
indicator Component
Amber LED is Drive CRUs
flashing (Fault LED lit)
RAID controller
port bypass
Controller drive
port bypass
LED
General Fault
LED (located
on the front of
the storage
subsystem)
Possible cause Possible solutions
Drive identity is in No corrective action needed.
process
A Fibre Channel Use the Read Link Status
loop initialization window in the Storage Manager
process (LIP) is Client Subsystem Management
being generated in window and the storage
the drive loop due subsystem event logs to isolate
to a faulty the faulty component.
component.
The enclosure Use the Recovery Guru menu
speed was set to 4 function in the Storage Manager
Gbps but the SFP Client Subsystem Management
inserted in the window to verify the problem and
controller drive SFP replace the SFP with a 4 Gbps
port does not SFP.
operate at 4 Gbps.
An intermittent Use the Recovery Guru menu
failure in the function in the Storage Manager
DS5020 storage Client Subsystem Management
subsystem window to diagnose the problem.
configuration. The
problem could be
directly related to
the hardware in the
configuration (hard
drive or bad cable)
or indirectly related
to the DS5020
storage 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.)
Chapter 6. Hardware maintenance
161