HP StorageWorks XP12000 - Disk Array Owner's Manual page 23

Item Label
8 PS-ON
9 PS ENABLE
10 PS ON/OFF
EMERGENCY
11
AUTO PS-ON
ENABLE/
12
DISABLE
Indicator Description
During normal operation, this LED should be on.
ON: The PS ON/OFF switch is on. If the SUB-SYSTEM
READY light (1) is also on, the disk array is ready to receive
LED (Green)
data.
OFF: The PS ON/OFF switch is off and the disk array is
not ready to receive data.
Used to enable the PS ON/OFF switch (10). During normal
operation, this switch should be in the "Disable" position
(opposite the ENABLE position).
ENABLE: The PS ON/OFF switch can be used.
Switch
DISABLE: The PS ON/OFF switch cannot be used. Do not
change the switch position unless directed to do so by HP
service personnel.
Used to power on/off the disk array. During normal
operation, this switch should be in the ON position.
The switch functions only if:
The PS ENABLE switch (9) is in the ENABLE position.
Switch
AND
The PS REMOTE/LOCAL switch (13) is in the LOCAL
position. Do not change the switch position unless directed
to do so by HP service personnel.
During normal operation, this LED should be on.
ON:
The UNIT EMERGENCY POWER OFF switch on the back
of the disk array cabinet is in the ON position.
LED (Red)
OFF:
The UNIT EMERGENCY POWER OFF switch is in the OFF
position. Place a service call to HP to have an HP support
representative reset the switch.
Used to enable the automatic power on restart feature,
which specifies how the disk array is powered on when
the AC power is turned on or restored after a power
outage.
ENABLE: When the AC power is turned on, the disk array
is powered on automatically.As with all sophisticated
electronic equipment, unstable power conditions during a
restart can cause problems. This switch should be in the
ENABLE position only if the power to the disk array is
subject to power conditioning equipment, such as a UPS,
Switch
to ensure that the power restored to the disk array is stable.
If your site does not have a UPS, keep this switch in the
DISABLE position. After a power outage, follow the manual
restart procedure only after power has been restored and
verified to be stable.
DISABLE: The disk array must be powered on manually,
using the PS ON/OFF switch (10) or the host power control
interface (PCI) (mainframe only).Do not change the switch
position unless directed to do so by HP service personnel.
XP12000 Disk Array Owner's Guide 23