Table
38.
Symptom-to-FRU
index
(continued)
Problem
indicator
Component
Possible
cause
Possible
solutions
One or more
green LEDs are
off (continued)
Several CRUs
Hardware failure
Replace the affected CRUs. If
this does not correct the problem,
replace the ESMs, followed by
the midplane. Contact an IBM
technical support representative.
The DS4000 was
Perform one of the following
not powered on, or
actions:
all fibre-channel
v
Power on the storage
connections
subsystem.
between the
EXP810 and the
storage subsystem
failed.
v
Verify that the fibre-channel
connections between the
EXP810 and the storage
subsystem are made.
Front panel
Power supply
problem
Make sure that the power cables
are plugged in and that the
power supplies are turned on.
Hardware failure
If any other LEDs are lit, replace
the midplane. Contact an IBM
technical support representative.
Green LED slowly Drive CRUs
The DS4000 was
Perform one of the following
flashing one per 2
not powered on, or
actions:
seconds
all fibre-channel
v
Power on the storage
connections
subsystem.
between the
EXP810 and the
DS4000 storage
subsystem failed.
v
Verify that the fibre-channel
connections between the
EXP810 and the storage
subsystem are made.
v
Ensure that all the EXP810s in
the same redundant drive
loop/channel pair have the
same enclosure speed setting.
Intermittent or
sporadic power
loss to the storage
expansion
enclosure
Some or all
CRUs
Defective ac power
source or
improperly
connected power
cable
Check the ac power source.
Reseat all installed power cables
and power supplies. If applicable,
check the power components
(power units or universal power
supply). Replace defective power
cables.
Power supply failure Check the power supply Fault
LED on the power supply. If the
LED is lit, replace the failed CRU.
Midplane failure
Have the midplane replaced.
Contact an IBM technical support
representative.
130
IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide
Summary of Contents for DS4000 EXP810
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