Hitachi G1500 - Emergency Power Off;On Procedures

Caution: Ex
cept in an emer
gency
, do not turn o
the PDU breakers before
turning o the power to the system. The system reacts as a power failure
occurred and uses the cache backup batteries to keep the cache active until
the data in the cache is transferred to the cache backup ash memory. When
the cache backup batteries discharge power, the power-on time can be
prolonged by the amount of charge remaining in the batteries. Fully
discharged batteries take 90 minutes to charge.
Note: The contr
ol panel includes a safety featur
e to pr
e
vent the storage
system power from being turned on or o accidentally. The PS power ON/OFF
switch does not work unless the ENABLE switch is moved to and held in
ENABLE while the power switch is moved to ON or OFF.
Procedure
1. In the PS area on the control panel, move the ENABLE switch to the ENABLED and
hold it there. While holding the switch in ENABLED, move the PS ON/OFF switch to
OFF. Then release both switches.
2. Wait for the storage system to complete its shutdown routines. Depending on the
storage system conguration and certain MODE settings, you can wait 20 minutes
for the storage system to copy data from the cache to the cache ash drives and for
the disk drives to spin down.
If the READY and PS LEDs do not turn OFF after 20 minutes, contact customer
support for assistance.
Emergency power off/on procedures
The following describes how to shut o the system during an emergency situation and
turning on power to the storage system after an emergency shutdown.
Turning off power to the storage system during an emergency
The storage system does not have an emergency power o switch. Use the following
pr
ocedure to turn o the system during an emergency.
Note: When turning o the storage system, rst turn o the PDUs connecting
to the contr
ollers and then turn o
the PDUs connecting to the drive tr
ays.
Pr
ocedure
1. Open the back doors of both racks that contain control units.
2. Turn o the circuit breakers in the following order:
a. Turn o the circuit breakers in both lower PDUs in both racks.
b. Turn o the circuit breakers in both upper PDUs in both racks with control
units.
3. Open the back doors of all racks containing only drive units and, in any order, turn
o the circuit breakers to all the PDUs.
Emergency power o/on procedures
Chapter 6: Turning power on and o to the storage systems
Hitachi Virtual Storage Platform G1000, G1500, and VSP F1500 Hardware Guide 123