HP XP7 Owner Guide (H6F56-96006)

4 Power On/Off procedures
Safety and environmental information
CAUTION: Before operating or working on XP7 Storage, read the safety section in the HP XP7
Site Preparation Guide and the environmental information in “Regulatory compliance notices”
(page 91).
Standby mode
When the disk array power cables are plugged into the PDUs and the PDU breakers are ON, the
disk array is in standby mode. When the disk array is in standby mode:
• The Basic Supply (BS) LED on the control panel is ON. This indicates that power is applied to
the power supplies.
• The READY LED is OFF. This indicates that the controller and drive chassis are not operational.
• The fans in both the controller and drive chassis are running.
• The cache destage batteries are being charged.
• The disk array consumes significantly less power than it does in operating mode. For example,
a disk array that draws 100 amps while operating draws only about 70 amps in standby
mode (see “System specifications and requirements” (page 78) for power consumption
specifications.
To put the disk array into standby mode from the OFF condition:
1. Ensure that power is available to the AC input boxes and PDUs in all racks in which XP7
Storage is installed.
2. Turn all PDU power switches/breakers ON.
To put the disk array into standby mode from a power on condition, complete the power off
procedures in this chapter. See “Power Off procedures” (page 71).
To completely power down the disk array, complete the power off procedures in this chapter, then
turn off all PDU circuit breakers.
CAUTION: Make certain that the disk array 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
disk array in an abnormal condition.
Power On/Off procedures
This section provides general information about power on/off procedures for XP7 Storage. If
needed, consult HP Technical Support for assistance.
Power On procedures
CAUTION: Only a trained HP support representative can restore power to the disk array.
Prerequisites
• Ensure that the disk array is in standby mode. See “Standby mode” (page 70).
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 (see “System control panel” (page 62)).
70 Power On/Off procedures