HP Configuring Arrays Reference Manual page 45

Splitting a mirrored array
Run the ACU GUI in offline mode. See "Accessing ACU in an offline environment
1.
the offline environment" on page 18)."
At the Configuration screen, select the appropriate controller from the Controller/Device menu.
2.
From the Systems and Devices tree, select the appropriate array.
3.
In the Available Tasks panel, click Split Mirrored Array.
4.
Click OK.
5.
When ACU finishes splitting the array, two logical drives appear in the Systems and Devices tree:
6.
When a RAID 1 or RAID 1+0 array splits, two RAID 0 logical drives are created.
o
When an array that contains a RAID 1 (ADM) logical drive splits, a RAID 1 logical drive and a RAID
o
0 logical drive are created.
When an array that contains a RAID 10 (ADM) logical drive splits, a RAID 1+0 logical drive and a
o
RAID 0 logical drive are created.
Shut down the OS.
7.
Power down the server.
8.
With power off, remove the physical drives that constitute one of the new arrays.
9.
If you do not remove the physical drives for one of the arrays, the OS will be unable to distinguish
between the two arrays when the server is restarted, because the arrays are identical.
Power up the server.
10.
Restart the OS.
11.
Recombining a split mirrored array
Run the ACU GUI in offline mode. See "Accessing ACU in the offline environment (on page 18)."
1.
At the Configuration screen, select the appropriate controller from the Controller/Device menu.
2.
From the Systems and Devices tree, select the array to use as the source array.
3.
In the Available Tasks panel, click Re-Mirror Array.
4.
Select the array to be mirrored to the source array.
5.
This array is usually the array that was split from the original mirrored array. However, it can be any
other array of the correct size.
Click OK.
6.
When ACU finishes re-mirroring the array, restart the OS.
7.
The controller uses the rebuild process to synchronize the mirrored drives. The drive online LED flashes
during the rebuild process. Depending on the hard drive size and the server load, this process can take
up to 2 hours. You can boot the OS during this time, but the logical drive is not fault-tolerant until the
rebuild is complete.
Creating a split mirror backup
This task splits an array that consists of one or more RAID 1, RAID 1+0, RAID 1 (ADM), or RAID 10 (ADM)
logical drives, and then creates two arrays: a primary array and a backup array.
To create a split mirror backup:
Run the ACU GUI in offline mode. See "Accessing ACU in the offline environment (on page 18)."
1.
("Accessing ACU in
HP Array Configuration Utility 45