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 for switch locations.
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 Maximum idle power per component and Mechanical environmental specifications.
To put the storage system into idle mode from the OFF condition:
- Ensure power is available to the AC input boxes and PDUs in all racks.
- 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.
|
Component |
Maximum idle power (VA) |
|
Controller Chassis 0 or 1 |
500 |
|
SFF Drive Box (SBX) |
1,040 |
|
LFF Drive Box (UBX) |
1,440 |
|
FMD Drive Box (FBX) |
1,720 |
|
NVME Drive Box (NBX) |
2,000 |
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
- Confirm the storage system is in idle mode. See System idle mode.
Procedure
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.
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.
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.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
Follow this procedure exactly when powering off the storage system.
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.
Procedure
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.
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.
Procedure
Open the back doors of both racks that contain control units.
Turn off the circuit breakers in the following order:
Turn off the circuit breakers in both lower PDUs in both racks.
Turn off the circuit breakers in both upper PDUs in both racks with control units.
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.
Procedure
In all system racks, turn on the circuit breakers in the PDUs supplying electrical power to the drive units.
In both controller racks, turn on the circuit breakers in the PDUs supplying electrical power to the controllers.
Turn on power to the system. For more information, see Normal power On/Off procedures.