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A P P E N D I X
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 RAIDar to shut down both controllers.
Wait until RAIDar indicates that processing is complete.
3. Press the power switches at the back of the controller enclosure to the Off position.
4. Press the power switches at the back of each expansion enclosure to the Off
position.
Powering On the System
Power on any expansion enclosures before powering on the controller enclosure.
This ensures that the disks in the expansion 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 expansion 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 yellow, the power-on sequence is
complete and no faults have been detected.
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