RAID 1: breaking mirrors and rebuilding drives, 4th Edition

10. Power off the server.

11. Remove the physical drives that constitute one of the new arrays.

IMPORTANT

If you do not remove one of the arrays, the OS cannot

distinguish between the two new arrays when the OS restarts

because the arrays will be identical.

12. Restart the OS.

Recombining a split mirrored array using ACU

Complete the following steps to re-mirror an array using ACU:

1. Take the server offline and insert the CD or bootable USB drive that contains the ACU (typically

SmartStart) into an appropriate media drive.

2. Restart the system, booting to the CD or bootable USB drive.

3. Select the HP ACU from the Maintenance Operation menu.

4. Select the controller that contains the array you want to re-mirror.

5. In the Configuration View panel, select the array to use as the source in the re-mirrored array.

6. In the Available Tasks panel, click Re-Mirror Array.

7. Select the array to be mirrored to the source. This is usually the array previously split out of the

original mirrored array, but it can be another array of the correct size.

CAUTION

This process destroys all data on the second array.

8. Click OK.

9. Restart the OS after ACU finishes re-mirroring the array. The Smart Array controller will use the

rebuild process to synchronize the mirrored drives. You can boot the OS during the rebuild

process, but the logical drive will not be fault-tolerant until the rebuild finishes.

NOTE

The drive-online LED will blink during the rebuild synchronization

process. The rebuild is complete when the LED stops blinking

and turns solid green. A 300GB SAS (3.5” 15K) drive can take

up to 2 hours to rebuild a mirrored array (depending on the

number of IOPS the server is submitting to the controller).

Refer to the HP website to find more information or to download the Array Configuration Utility.