Chapter 4: Turning Storage System Power On And Off; System Idle Mode - Hitachi Virtual Storage Platform 5000 Series Hardware Manual

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Table Of Contents

Table of Contents

Chapter 4: Turning storage system power on

and off

The storage system can be powered on and off using the power control panel located on

the node interconnect switch during normal operating conditions or a power failure. See

Node interconnect switch (on page 41)

System idle mode

When the storage system power cables are plugged into the PDUs and the PDU breakers

are on, the storage system is in idle (basic supply only) mode. When the storage system

is in idle mode:

The amber Basic Supply (BS) LED on the control panel is on. AC power is applied to

■

the power supplies.

The green READY LED is off. The controller chassis and drive boxes are not

■

operational.

The fans in both the controller chassis and drive boxes are running.

■

The cache backup batteries are being charged.

■

The storage system consumes significantly less power than it does in operating mode.

■

For example, a storage system that draws 100 amps while operating draws only 40 to

60 amps in idle mode, depending on the number of drives in the system. The more

drives, the more power is saved. See

page 69)

and

To put the storage system into idle mode from the OFF condition:

1. Ensure power is available to the AC input boxes and PDUs in all racks.

2. Turn on all PDU power switches and circuit breakers.

To put the storage system into idle mode from a power on condition, perform the steps

Power off procedures (on page 70)

To shut down the storage system, perform the power off procedures, and then turn off

all PDU circuit breakers.

Warning: Verify the storage system is turned off normally and in idle mode

before turning off the PDU circuit breakers. Otherwise, turning off the PDU

circuit breakers can leave the storage system in an abnormal condition.