Answer

Attention: To assure the safety of the data contained on your RAID array, please run a complete backup and verify prior to beginning the following procedure. When changing any configuration or adapter card there is always a danger of data loss.

The simplest and easiest way to break a RAID 1 mirror on the 1200A is to have only one of the drives in the mirrored pair connected at startup time or boot time.

This will cause the 1200A Raid card to detect a broken RAID 1 due to the missing drive and display an alternate startup screen that will show the following options:

Broken RAID 1 - Critical Status - A disk member of a mirroring array has failed or is not responding. The array is still functional, but fault tolerance is disabled.
 

• Power off and check the failed drive
• Destroy the Mirroring Relationship
• Choose a Replacement drive and Rebuild
• Continue to Boot
   

When option number two (2.) is chosen, it will delete the RAID table information from the drive that is currently connected to the 1200A RAID controller. This operation will make that drive appear as a stand alone drive that is not a member of a mirrored pair.

Note: This operation must be run on both drives that were part of the mirrored pair to erase the RAID table information on each drive. This will result with 2 independent, non raided drives, each with the same data on them.
CAUTION! Do not use the " Delete array " operation through the " Ctrl+H " Bios of the 1200A, this will not only delete the array, but also delete any partition information along with all of the data on all drives. Once the delete option has been chosen there is no way to get the data back.