IBM TotalStorage DS4000 EXP700 Installation, User's, And Maintenance Manual page 111

Table 17. Symptom-to-FRU index (continued)
Problem
indicator Component
All green LEDs All CRUs
are off
Amber LED is Drive CRUs
flashing
Amber Conflict ID Rear panel
is lit
One or more Drive CRUs
green LEDs are
on
One or more Drive CRUs
green LEDs are
blinking slowly
One or more Power supply
green LEDs are CRUs
off
All drive CRUs
Several CRUs
Front panel
Possible cause Possible solutions
Subsystem power is Check that all storage expansion
off enclosure 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.
AC power failure Check the main circuit breaker
and ac outlet.
Power-supply failure Replace the power supply.
Midplane failure Contact an IBM technical-support
representative to service the
storage expansion enclosure.
Drive rebuild or No corrective action needed.
identity is in process
The same enclosure Using the x1 digit only, set the
ID is being shared enclosure ID for each storage
by several storage expansion enclosure in a drive
expansion loop to a unique number 00 to
enclosures. 07.
DS4000 EXP710 Verify that the controller firmware
only: The DS4000 is at version 6.10.xx.xx or later
EXP710 is set up in
a configuration with
incorrect controller
firmware.
There is no activity Note: This can indicate normal
to the drive. activity.
Replace the SFP.
Power cable is Make sure the power cable is
unplugged or plugged in and the switches are
switches are turned turned on.
off
Midplane failure Replace the midplane (contact an
IBM technical-support
representative).
Hardware failure Replace the affected CRUs. If
this does not correct the problem,
have the ESMs replaced,
followed by the midplane.
Contact an IBM technical-support
representative.
Power-supply Make sure that the power cables
problem 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.
Chapter 4. Hardware maintenance
79