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Hitachi Vantara Knowledge

Turning power on and off to the storage systems

The following describes the prerequisites and procedures for turning the power on and off to the VSP G1000, VSP G1500, and VSP F1500 storage systems during normal operating conditions or a power failure.

Power control panel

The power control panel is located in the top left corner of the controller. It is covered by a 2U-high bezel that can be removed separately from the 8U bezel that covers the rest of the controller.

The following illustration shows the switches and indicators on the control panel. The following table lists the components and LED descriptions. All LEDs are shown ON to demonstrate the LED color.

Figure 1: Storage system power control panel
GUID-D732808A-0B30-41BF-8912-1DA05A15C0E5-low.png
Table 1: Storage system power controls and status indicators

Item

Description

1

REMOTE MAINTENANCE switch

  • Set to ENABLE to allow remote maintenance.
  • Set to DISABLE to prevent remote maintenance.

2

ENABLE switch: Used to enable the PS ON/PS OFF switch. See Power on procedures.

3

POWER switch: Turn system power on or off. See Power on procedures.

4

READY LED: Indicates the operational status of the system

  • Off: When the channel interface is not operational.
  • Green: When the I/O operation on the channel interface is enabled.

5

ALARM LED

  • Off: When the system is off or when the system is on and operational without failures .
  • Red: When the SVP detects a component failure or other failure condition in the system.

6

MESSAGE LED

  • Off: When power is off, or when a system-generated message is not in the queue, and the SVP has not failed.
  • Amber: On when a system information message (SIM) is generated by either cluster and sent to Device Manager - Storage Navigator and to the users that are set up in Device Manager - Storage Navigator to receive them.
  • Blinking: When an SVP failure has occurred in a single SVP configuration, or if both SVPs have failed in a dual SVP configuration. Does not blink if only one SVP in a dual SVP configuration fails.

7

PROCESSING LED: Indicates the status of remote processing

  • Off: When power is off or when remote maintenance is not taking place.
  • Amber: On when remote maintenance is taking place.

8

BS-ON LED: Indicates the status of the AC power to the system (basic supply)

  • Off: When AC power is applied to the system from the PDUs.
  • Amber: On when AC power is applied to the system from the PDUs. The fans are running.

9

PS-ON LED: Indicates the status of the DC power to the system

  • Off: When AC power is not applied to the system and when AC power is applied to the system, and the system is in idle mode.
  • Green: When power is on, DC power is applied to the system, and the system is running.

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 and drive chassis are not operational.
  • The fans in both the controller and drive chassis 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 Table 1: Maximum idle power per chassis and Table 1: Dimension specifications.

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 in Power off procedures.

To shut down the storage system, perform the power off procedures, and then turn off all PDU circuit breakers.

WARNINGVerify 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.
Table 1: Maximum idle power per chassis

Chassis

Maximum idle power (VA)

Controller Chassis 0 or 1

500

SFF Drive Chassis

1,120

LFF Drive Chassis

720

FMD Drive Chassis

1,280

Normal power on/off procedures

This section provides general information about turning on and turning off the power to the storage system. If further assistance is required, contact customer support.

Power on procedures

Before you begin

NoteThe control panel includes a safety feature to prevent the storage system power from being turned on or off accidentally. The PS 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.

Perform the procedure to turn on the storage system. If applicable, see Power control panel.

Procedure

  1. On the control panel, check the amber BS LED and make sure it is lit. It indicates that the storage system is in idle mode.

  2. In the PS area on the control panel, move the ENABLE switch to the ENABLE position and hold it there. While holding the switch in the ENABLE position, move the PS ON/OFF switch to ON. Then release both switches.

  3. Wait for the storage system to complete its power-on self-test and start processes. Depending on the storage system configuration, this can take several minutes.

    The storage system does not go to the READY state until the cache backup batteries are charged to at least 50%. The process can take 90 minutes if the batteries are completely discharged. The storage system generates a SIM that provides the status of the battery charge. See Cache backup batteries for information about the batteries.
  4. When the system self-test is complete and all components are operating normally, the green READY LED turns ON and the storage system is ready for use.

    If the ALARM LED is also ON, or if the READY LED is not ON after 20 minutes, contact customer support for assistance.

Power off procedures

Before you begin

  • Confirm all maintenance and software-specific shutdown procedures have been completed.
  • Verify 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 off the storage system.
CautionExcept in an emergency, do not turn off the PDU breakers before turning off 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 flash 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.
NoteThe control panel includes a safety feature to prevent the storage system power from being turned on or off 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 configuration and certain MODE settings, you can wait 20 minutes for the storage system to copy data from the cache to the cache flash 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 off 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 off switch. Use the following procedure to turn off the system during an emergency.

NoteWhen turning off the storage system, first turn off the PDUs connecting to the controllers and then turn off the PDUs connecting to the drive trays.

Procedure

  1. Open the back doors of both racks that contain control units.

  2. Turn off the circuit breakers in the following order:

    1. Turn off the circuit breakers in both lower PDUs in both racks.

    2. Turn off 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 off the circuit breakers to all the PDUs.

Turning on power to the storage system after an emergency shutdown

To turn the power on to the storage system after an emergency shutdown, use the following instructions.

NoteWhen turning on the storage system, first turn on the PDUs connecting to the drive trays and then turn on the PDUs connecting to the controllers.

Procedure

  1. In all system racks, turn on the circuit breakers in the PDUs supplying electrical power to the drive units.

  2. In both controller racks, turn on the circuit breakers in the PDUs supplying electrical power to the controllers.

  3. Turn on power to the system. For more information, see Normal power On/Off procedures.