Planned Power Off; Emergency Power Off; To Power Off The Disk Array In An Emergency; Emergency Power-Off Switch Location - HP StorageWorks XP20000/XP24000 - Disk Array Owner's Manual

Planned power off

Occasionally, you may need to plan a site power outage, such as during alterations to the data
center, inspections, or work by the electric company. If a scheduled power outage will affect the disk
array, contact your HP support representative to schedule a planned power off.
CAUTION:
Only a trained HP support representative can shut down and power off the disk array.
Do not attempt to power down the disk array other than during an emergency.

Emergency power off

In an emergency, it is critical to remove power to the disk array as quickly as possible.
CAUTION:
Performing the emergency power off procedure immediately shuts down the disk array, neglecting
the array's normal power off sequence. Jobs in process are aborted and their integrity after recovery
is not guaranteed. Use this power off method only in an emergency. Only a qualified HP support
representative can reset the switch and restore power to the disk array.
Emergency situations in which you should consider performing the emergency power off procedure
are:
A physical location catastrophe such as a flood, hurricane, tornado, or earthquake
Any circumstance that presents the threat of injury or death to a person
You detect any smoke, abnormal loud noise, or smell coming from the disk array

To power off the disk array in an emergency

1. Locate the UNIT EMERGENCY POWER OFF switch on the back side of the DKC, as shown in
Figure 12.
Figure 12 Emergency power-off switch location
.
XP24000/XP20000 Disk Array Owner's Guide 41