IBM TotalStorage DS5100, Инструкция по установке, использованию и обслуживанию

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3. Turn off all power-supply switches; then unplug the power cords from the
storage subsystem.
Restoring power after an emergency shutdown
Use the following procedure to restore power to the storage subsystem in a
configuration after an unplanned shutdown.
Risk of severe electrical shock – Never turn on the power to any equipment if
there is evidence of fire, water, or structural damage. Doing so might cause severe
electrical shock.
1. Visually check the equipment for damage. Is there evidence of damage to any
of the storage subsystem components, cables, or equipment attached to the
storage subsystem?
v Yes – Do not continue with this procedure. Contact your IBM service
representative for assistance. Depending on the current service agreements,
you might need to return the equipment to the factory or local service center
for repair.
v
No – Go to step 2.
Potential data loss – Before resetting circuit breakers in the cabinet, ensure
that the storage subsystem and storage expansion enclosures power switches
are turned off. Resetting circuit breakers after an emergency situation while the
storage subsystem and storage expansion enclosure power switches are
turned on can cause potential data loss because the configuration components
might not be powered on in the correct sequence. See “Turning on the storage
subsystem” on page 131 for details about the correct power-on sequence.
2. Do whatever is necessary to cool the unit (replace the fans, use external fans
to cool the room, and so on).
3. Verify the main circuit breakers in the cabinet are turned off.
4. Verify that the ac power switch on each DS5100 and DS5300 is turned off.
(Figure 88 on page 123 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 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 88 on page 123 shows the location of the ac power switch
Chapter 4. Operating the storage subsystem
137