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2-14 Architecture and Components
Hitachi Universal Storage Platform V/VM User and Reference Guide
Table 2-4 Control Panel (USP V and USP VM)
Name Type Description
SUBSYSTEM
READY
LED
(Green)
When lit, indicates that input/output operation on the channel
interface is possible. Applies to both storage clusters.
SUBSYSTEM
ALARM
LED
(Red)
When lit, indicates that low DC voltage, high DC current, abnormally
high temperature, or a failure has occurred. Applies to both storage
clusters.
SUBSYSTEM
MESSAGE
LED
(Amber)
On: Indicates that a SIM (Message) was generated from either of the
clusters. Applied to both storage clusters.
Blinking: Indicates that the SVP failure has occurred.
SUBSYSTEM
RESTART
Switch
Used to un-fence a fenced drive path and to release the Write Inhibit
command. Applies to both storage clusters.
REMOTE
MAINTENANCE
PROCESSING
LED
(Amber)
When lit, indicates that remote maintenance activity is in process. If
remote maintenance is not in use, this LED is not lit. Applies to both
storage clusters.
REMOTE
MAINTENANCE
ENABLE/DISABLE
Switch
Used for remote maintenance. While executing remote maintenance
(the REMOTE MAINTENANCE PROCESSING LED in item 5 is blinking),
when switching from ENABLE to DISABLE, remote maintenance is
interrupted. If the remote maintenance function is not used, this
switch is ineffective. Applies to both storage clusters.
BS-ON
LED
(Amber)
Indicates input power is available.
PS-ON
LED
(Green)
Indicates that storage system is powered on.
Applies to both storage clusters.
PS SW ENABLE Switch
Used to enable the PS ON/ PS OFF switch. To be enabling the PS ON/
PS OFF switch, turn the PS SW ENABLE switch to the ENABLE
position.
PS ON / PS OFF Switch
Used to power storage system on/off. This switch is valid when the
PS REMOTE/LOCAL switch is set to LOCAL. Applies to both storage
clusters.
EMERGENCY
LED
(Red)
This LED shows status of EPO switch on the rear door.
OFF: Indicates that the EPO switch is off.
ON: Indicates that the EPO switch is on.