Applying Power To The Disk Array - HP Surestore Disk Array 12h - And FC60 Advanced User's Manual

Applying Power to the Disk Array

Once the hardware installation is complete, the disk array can be powered up. It is
important that the proper sequence be followed when powering up the components of the
disk array. To ensure proper operation, power should be applied to the disk enclosures first
and then to the controller enclosure, or all components can be powered up simultaneously.
This gives the disks time to spin up, ensuring that the disks are detected when the
controller comes on line.
Once power is applied to all components, proper operation of the disk array is verified by
checking the LEDs on both the controller enclosure and disk enclosure.
What happens if the disk enclosures are powered up before the
Note
controller enclosure?
When the disk array controller enclosure is powered up, it checks for the
presence of the disks in the disk enclosures. If the disk enclosures have not yet
been powered on, the controller will not detect the disks. This will result in no
LUNs appearing because none of the disks are visible to the controller. In this
case it will be necessary to power down the disk array and power it up again in
the proper sequence.
To power up the disk array:
The following procedure assumes the disk array components will be powered
Note
up individually. All disk array components can also be powered up
simultaneously using a single rack power switch.
1. Open all front doors on the disk enclosures.
2. Power up each disk enclosure using the disk enclosure power switch (A in
Applying Power to the Disk Array
198
Figure 75).