HP StorageWorks XP48 - Disk Array, Owner'S Manual

Page: 35 / 124

The HP SureStore E Disk Array XP512 Hardware 35
UNIT EMERGENCY POWER OFF
A switch is provided on the control panel on the front side of the disk
control frame (DKC) for an emergency powering off.
If you encounter any abnormality such as an abnormal sound, smell, or
smoke, power off the disk subsystem by operating the UNIT
EMERGENCY POWER OFF switch following the procedure below. The
procedure for operating the switch is as follows:
1. Push the control panel cover at the portion where PUSH is marked, open
the control panel cover, then operate the UNIT EMERGENCY POWER
OFF switch.
2. In using a UNIT EMERGENCY POWER OFF switch, first pull it up
and then pull it toward you as illustrated in figure 6 (page 36).
Caution
Pulling a UNIT EMERGENCY POWER OFF switch on the disk controller
instantly shuts down the storage subsystem, neglecting the system’s
power-off sequence. Jobs in process are aborted, and their integrity after
recovery is not guaranteed. Therefore, this method should be used only in
an emergency and not in usual maintenance.
Caution
The UNIT EMERGENCY POWER OFF switch on the disk controller
provides only partial power-off capability. AC input power remains present
at the primary circuit. Therefore, do not use the switches on these units
unless you need to power off the unit as an emergency measure.
When pulled, a UNIT EMERGENCY POWER OFF switch locks itself to
prevent further powering on and requires a trained and qualified HP field
engineer for recovery.