• The POWER LED is amber. This indicates that AC power is applied to the
power supplies but DC power is not supplied to the rest of the system,
except as noted below.
• The READY LED is OFF. This indicates that the controller and drive trays
are not operational.
• The fans in both the controller chassis and drive trays are running.
• The cache destage 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 about 70 amps in standby mode. See Table
A-4 HUS VM electrical specifications, single phase current on page A-5
and
Table A-6 Power consumption, single phase current on page A-7
for power consumption specifications.
To put the storage system into standby mode from the OFF condition:
1. Ensure that power is available to the AC input receptacles and PDUs in all
racks in which the HUS VM storage system is installed.
2. Turn all PDU power switches/breakers ON.
To put the storage system into standby mode from a power on condition,
complete the steps in
Power off procedures on page 5-5.
To completely power down the storage system, complete the power off
procedures in this chapter, then turn off all PDU circuit breakers.
WARNING: Make certain that the storage system is powered off normally
and in standby mode before turning off the PDU circuit breakers. Otherwise,
turning off the PDU circuit breakers can leave the storage system in an
abnormal condition.
Normal Power on/off procedures
This section provides general information about power on/off procedures for
the HUS VM storage system. If needed, call technical support for assistance.
Power on procedures
Prerequisites:
• Ensure that the storage system is in standby mode. See Standby mode
on page 5-3.
Follow this procedure exactly when powering the storage system on. Refer to
the illustration of the control panel as needed.
1. If the front bezel is installed, press the Power ON/Off button. If the front
bezel is not installed, press the right side of the rocker switch move the
POWER ON/OFF switch to the ON position.
5-4
Power On/Off procedures
Hitachi Unified Storage VM Block Module Hardware User Guide
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