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64 HP StorageWorks Disk Arrays XP128/XP1024: Owner’s Guide
Emergency power-off
A switch is provided on the operator panel on the front side of the disk
control frame (DKC) for turning power off in an emergency.
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 operator panel cover at the location where PUSH is marked,
open the operator panel cover, then operate the 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 the figure below.
Caution Pulling a UNIT EMERGENCY POWER OFF switch on the disk controller
instantly shuts down, 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 only
provides 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 of the unit as an emergency measure.
When pulled, the UNIT EMERGENCY POWER OFF switch mechanically
locks itself in the off position to prevent restoring power in a potentially
hazardous situation. A qualified HP service representative is required on
site to restore power. Any time the unit Emergency/Only OFF switch is
pulled, place a service call to Hewlett-Packard to have the switch reset and
have the disk array restored to service.