Hitachi VSP User and Reference Guide
4–4
Power On/Off Procedures
Power Off procedures
Prerequisites:
• Ensure that all software-specific shutdown procedures have been
completed. Refer to the applicable user manuals for details
• Ensure that all I/O activity to the storage system has stopped. You can
vary paths offline and shut down the attached hosts.
Follow this procedure exactly when powering the storage system off.
1. In the PS area on the control panel, move the ENABLE switch to the
ENABLED position and hold it there. While holding the switch in the
ENABLED position, move the PS ON/OFF switch to the OFF position.
Then release both switches.
2. Wait for the storage system to complete its shutdown routines.
Depending on the storage system configuration and certain MODE
settings, it can take up to 20 minutes for the storage system to copy
data from cache to the disk drives and for the disk drives to spin down.
Emergency power off/on procedure
This section describes the procedures to follow to shut down the system in
case of emergency and how to bring the system back up after an emergency
shutdown.
Emergency power off procedure
The VSP storage system does not have an emergency power off switch as
the USP V/VM storage system does.
To shut the system down in an emergency, power off the controllers first,
then the drive units, as follows.
1. Open the back doors of both racks that contain control units.
a. Turn off the circuit breakers in both lower PDUs in both racks.
b. Turn off the circuit breakers in both upper PDUs in both racks with
control units.
2. Open the back doors of all racks that contain only drive units and turn
the circuit breakers off in all the PDUs in any order in those racks.
Note: The control panel includes a safety feature to prevent the storage
system power from accidentally being turned on or off. The PS power ON/
OFF switch does not work unless the ENABLE switch is moved to and held
in the ENABLE position while the power switch is moved to the ON or OFF
positions.
Note: If the READY and PS LEDs do not turn OFF after 20 minutes,
contact the support center for assistance.
Note: Quick Procedure
Controllers: Power PDUs off first. Power PDUs on last.
Drives: Power PDUs off last. Power PDUs on first.
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