HP StorageWorks XP48 - Disk Array, Owner'S Manual

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60 HP SureStore E Disk Array XP512/XP48: Owner’s Guide
Recovering from a Power Outage to the Disk Array
A power outage to the array is when the primary building power is lost due
to electrical blackouts, thunderstorm activity, etc., and input AC power is
not received by the array. The disk array will maintain its state and recover
when power is restored. The array cache is backed up by batteries that will
maintain its state for a minimum of 48 hours. This length of time will
provide coverage for most outages. In cases where the outage will extend
beyond 48 hours, the batteries can be replaced by an HP CE, which will
extend the time, if necessary.
Caution
After power is restored to the customer site and before restoring power to
the disk array, HP recommends verification of power by an electrician to
ensure all phases are restored and input power to the disk is stable.
The user may opt to call a trained HP representative to recover from the
disk array power failure. The user may also use the following procedures
for disk array power-failure recovery:
1. Move the REMOTE/LOCAL switch on the front panel (14, figure 9
(page 51)) to the LOCAL position. The normal position is REMOTE.
2. Hold down the ENABLE switch while toggling the PWR ON/OFF
switch to the PWR ON position (11/12, figure 9 (page 51)).
3. The following LED power sequence will occur:
The BS-ON (9, figure 9 (page 51)) will turn amber, and the PS ON
LED (10, figure 9 (page 51)) will turn green.
The CHANNEL LED (7, figure 9 (page 51)) will light green for every
adapter installed.
The MESSAGE LED (3, figure 9 (page 51)) will turn amber
signifying a SIM was generated (because the disk array went down
unexpectedly).
Finally, the Ready LED (1, figure 9 (page 51)) will light green
signifying the system is ready.