Emergency Power Off; Planned Power Off; Recovering From An Unplanned Power Outage - HP StorageWorks XP10000 - Disk Array Owner's Manual

Emergency power off

The system does not have an emergency power off switch. In an emergency when it is crucial to power
off the system immediately for safety reasons, remove power at the AC branch circuit breakers in your
facility that supply power to the system. Take care when placing these breakers that they are clearly
marked and easily accessible.
CAUTION:
Performing an emergency power off immediately shuts down the system, neglecting the 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. Afterwards, only a qualified HP support representative is allowed to
restore power to the system. Call your HP support representative immediately.
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.

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
system, 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 system.
Do not attempt to power down the disk array other than during an emergency.

Recovering from an unplanned power outage

Unplanned power outages occur when the primary building power is lost due to electrical blackouts,
thunderstorm activity, or similar occurrences, and input AC power is not received by the system. The
system will maintain its state and recover when power is restored.
The system cache is powered by backup batteries that will maintain the system state for up to 36
hours, depending on the selected battery operation mode.
For restart procedures after power is restored to the system, see the following text about manual and
automatic restart of the system.
XP10000 Disk Array Owner's Guide 29