HP StorageWorks XP48 - Disk Array, Owner'S Manual

Page: 55 / 124

The HP SureStore E Disk Array XP48 Hardware 55
UNIT EMERGENCY POWER OFF
A switch is provided on the control panel 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 10 (page 56).
Caution
Pulling the UNIT EMERGENCY POWER OFF switch on the disk array
cabinet instantly shuts down the array, 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 normal operation.
Caution
The UNIT EMERGENCY POWER OFF switch on the disk array cabinet
only partially restores power from the array. AC input power remains
present at the primary circuit. Therefore, do not use the UNIT
EMERGENCY POWER OFF switch 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.