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APPENDIX
A
Powering the System Off and On
This appendix describes how to power off and power on the system when needed.
Powering Off the System
The system rarely needs to be powered off. You remove power only when you plan
to physically move the system to another location.
Use this procedure when you need to power off the system.
1. Stop all I/O from hosts to the system.
2. Use SMU to shut down both controllers.
Wait until SMU indicates that processing is complete.
3. Press the power switches at the back of the controller enclosure to the Off
(O)
position.
4. Press the power switches at the back of each drive enclosure to the Off
(O)
position.
Powering On the System
Power on any drive enclosures before powering on the controller enclosure. This
ensures that the disks in the drive enclosures have enough time to completely spin
up before being scanned by the RAID controllers in the controller enclosure.
Depending on your configuration, it can take several minutes for the system to
power up.
Use this procedure to turn power on for all enclosures installed in a rack.
1. Press the power switches at the back of each drive enclosure to the On (
–) position.
While enclosures power up, their LEDs blink. After the LEDs stop blinking, if no
LEDs on the front and back of the enclosure are amber, the power-on sequence is
complete and no faults have been detected.