DescriptionIndicatorLabelItem
During normal operation, this LED should be on.
• ON: The disk array is plugged in and receiving power
from the primary AC outlet. The SVP is receiving
power from the outlet.
• OFF: The disk array is not receiving power from the
primary AC outlet. Check the electrical outlets in your
building.
LED (Amber)
BS-ON
8
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 data.
• OFF: The PS ON/OFF switch is off and the disk array
is not ready to receive data.
LED (Green)PS-ON9
Used to enable the PS ON/OFF switch (11). During
normal operation, this switch should be in the “Disable”
position (opposite the ENABLE position).
• ENABLE: The PS ON/OFF switch can be used.
• DISABLE: The PS ON/OFF switch cannot be used.
Do not change the switch position unless directed to
do so by HP service personnel.
SwitchPS ENABLE10
Used to power on/off the disk array. During normal op-
eration, this switch should be in the ON position.
The switch functions only if:
the PS ENABLE switch (10) is in the ENABLE position,
AND the PS REMOTE/LOCAL switch (12) is in the LOCAL
position. Do not change the switch position unless
directed to do so by HP service personnel.
SwitchPS ON/OFF11
Determines how the disk array is powered on or off.
During normal operation, this switch may be in either
position, depending on your operating environment.
• REMOTE: Disk array is powered on/off by the instruc-
tions of the host PCI (mainframe only).
• LOCAL: Disk array is powered on/off by the PS
ON/OFF switch (11). Do not change the switch pos-
ition unless directed to do so by HP service personnel.
Switch
PS
REMOTE/LOCAL
12
Used by an HP support representative to test the function-
ing of the LEDs on the control panel or to reset alarms.
Do not change the switch position unless directed to do
so by HP service personnel.
SwitchCHK RST13
Powering down the disk array
Two situations may arise when you need to power down the system:
• Planned power off
• Emergency power off
Operating the HP XP24000/XP20000 Disk Array40
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