IBM DS4800 Installation, User And Maintenance Manual page 156

Table 38. Interconnect-battery unit LEDs (continued)
Legend
128
IBM System Storage DS4800 Storage Subsystem: Installation, User's, and Maintenance Guide
LED Color
2
Power Green LED
3
Overall Amber LED
DS4800
Configuration
Needs
Attention
Normal Status Problem Status/Procedure
On = storage Off = storage subsystem is
subsystem is powered off
powered on
If the storage subsystem is
powered on but this LED remains
off, examine the power supply and
fan units, the connected PDUs,
and the connected power circuits
for any of the following conditions:
v Both power supply and fan units
are not turned on.
v A circuit breaker has tripped.
v The connected PDUs are turned
off or have been tripped.
v There is no power at the wall
circuit.
v The interconnect-battery unit is
bad.
Off On = A component in the storage
subsystem configuration has
developed a fault.
Inspect the Needs Attention LEDs
on the other components in the
DS4800 Storage Subsystem and in
all connected DS4000 storage
expansion enclosures to isolate the
fault.
However, it is recommended that
you use the DS4000 Storage
Manager Subsystem Management
window to identify the cause of the
problem and use the Recovery
Guru to help fix the problems.
Some of the problems may not
cause the Needs Attention LED on
the individual CRU to light, but
they will cause this Overall
DS4800 Configuration Needs
Attention LED to light. For
example, a hard disk drive that
exceeds its PFA errors will cause
this LED to light, but the drive
Needs Attention LED for the
individual drive in the attached
storage expansion enclosure will
not light.
See "Troubleshooting the storage
subsystem" on page 117.