HP Surestore Disk Array 12h and FC60 - Manual (Page 205)

Applying Power to the Disk Array 205
Inst
alla
tion
Powering Down the Array
When powering down the disk array, the controller enclosure should be powered down
before the disk enclosures.
To power down the disk array:
1. Stop all I/Os from the host to the disk array.
2. Wait for the Fast Write Cache LED to go off, indicating that all data in cache has been
written to the disks.
3. Power down the controller enclosure.
4. Power down the disk enclosures.
Note If necessary, power to all components of the disk array can be shut off
simultaneously using a single cabinet power switch or circuit breaker. In this
situation, stop all I/O to the disk array and then wait two minutes for all cache
data to be written to disk before shutting off power. The Fast Write Cache LED
will remain off when all cache data is written.