IBM DS4800 User, Installation And Maintenance Manual page 126

10. Determine the status of all storage subsystems and their components in the
11. Are the LEDs indicating normal operation, and is the status Optimal on all the
12. Diagnose and correct the fault by completing the following steps.
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IBM System Storage DS4800 Storage Subsystem: Installation, User's, and Maintenance Guide
3. Verify the main circuit breakers in the cabinet are turned off.
4. Verify that the AC power switch on each DS4800 Storage Subsystem is turned
off. (Figure 67 on page 89 shows the location of the AC power switch on each
controller.)
5. Verify that both power switches on all storage expansion enclosures in the
configuration are turned off.
6. Turn on the main circuit breakers in the cabinet.
7. Turn on both power switches on the back of each storage expansion
enclosure.
Attention: You must turn on power to each attached storage expansion
enclosure before turning on power to the storage subsystem to ensure that the
controllers acknowledge each storage expansion enclosure.
8. Verify that no ESM port bypass LEDs are lit on any storage expansion
enclosures.
If any ESM port bypass LEDs are lit, reseat the ESMs and check the ESM port
bypass LEDs again.
If the ESM port bypass LEDs remain lit, then reseat the SFP modules and the
fibre channel cables at both ends of the connections.
If the problem is not resolved, use the fibre channel wrap-plug and coupler to
attempt to isolate the problem to the ESM port, SFP, or fibre channel cable.
See the IBM System Storage DS4000 Problem Determination Guide for
information on performing wrap plug tests.
9. Turn on the AC power switch on the back of each controller in the storage
subsystem. Figure 67 on page 89 shows the location of the AC power switch
on the controller. The storage subsystem might take several minutes to power
up, depending on the number of attached storage expansion enclosures. The
battery self-test might take an additional 15 minutes. The LEDs will blink
intermittently until the storage subsystem powers up and completes the battery
self-test.
configuration, by completing the following steps.
a. Check all LEDs on each component in the storage expansion enclosures.
Ensure that all the LEDs show normal status.
b. Check all LEDs on each component in the DS4800 Storage Subsystem.
Ensure that all the LEDs show normal status. For information about LED
status, see "Checking the LEDs" on page 111.
c. Open the Subsystem Management Window, and display the Physical View
for the configuration.
d. Review the status of the configuration components shown in the
Subsystem Management Window by selecting the appropriate component
button for each storage subsystem. The status for each component will be
either Optimal or Needs Attention.
configuration components?
v Yes – End of procedure.
v No – Go to step 12.
a. Run the Recovery Guru by selecting the Recovery Guru toolbar button in
the Subsystem Management Window.
b. Complete the recovery procedure. If the Recovery Guru directs you to
replace a failed component, use the individual LEDs on the storage