Split Mirrored Array

This task splits an array that consists of one or more RAID 1+0 logical drives into two identical new arrays consisting of RAID 0 logical drives. This feature is useful when you want to replicate a configuration, or when you want to build a backup before performing a risky operation. After completing a Split Mirror operation, you can perform a Re-Mirror Array operation to get back to a RAID 1+0 configuration.

Important Notes:

  • This task is only available for specific array controllers. Check array controller documentation for details.
  • This task will only be available when the ACU is running from an offline CD boot environment. This task will not be available when running ACU from the operating system.
  • An array can only be split if it has RAID 1+0 logical drives. You cannot split an array if it contains logical drives in RAID 0, RAID 5, or RAID 6 (ADG) configurations.

Steps to Split a Mirrored Array

  1. Shutdown the server.
  2. Insert the CD that contains ACU into the CD-ROM drive and boot.
  3. Open ACU, and stay in Standard configuration mode (the default).
  4. Select the controller that contains the array that you want to split.
  5. In the Configuration View panel, select the array.
  6. In the Select a Task panel, click Split Mirrored Array.
  7. Click on Save to save the configuration.
  8. When the utility has finished splitting the array, remove the physical drives that constitute one of the new arrays and remove the array from ACU.

    Warning!
    If you do not remove one of the arrays, the server will be unable to distinguish between the two new arrays after it is restarted (next step) because the arrays are identical in all respects.
    If you remove the physical drives without removing the array from the configuration, the server will report all logical drives in the array as failed.

  9. Restart the server.