Broken RAID 1 Mirror

I have uncovered today that my RAID 1 10.4.11 G5 server has had the mirror break sometime before or when I did the the upgrade from 10.4.10 to 10.4.11. I've been looking around, and I can't seem to find direction on how to properly 'break' the mirror.
I'd like to 'break' the mirror so I have 1 good drive, then clone the drive, and re-establish the mirror. Can someone point me in the direction of some documentation or guide me through that process?
At the moment I'm scarfing up a copy of the data so if 'really bad things' happen, we'll not be waiting too long to restore and repair things. It's always good to have an 'extra' copy of your backup!
Thanks for the help!

Hi
The way I would do this would be to remove the internal RAID 1 Set (both drives). I'm guessing the current RAID set contains everything? OS and Data? Install one of them in an external drive case. They're cheap enough and besides are a useful thing to have.
Install the replacement drives. Connect the external drive case (should be firewire). Boot from any installer disk that will boot the hardware being used. Launch Disk Utility from the appropriate Menu. Partition the two new drives. Create a RAID 1 Mirror Set. Make sure you select the 'Automatically rebuild RAID' option. Leave everything else at their defaults. Use Disk Utility to restore the external drive (as the source) to the newly created RAID Set (as the destination). This will take some time as data is written to both drives. When done set the internal RAID set as the Startup Disk. Restart and disconnect the external drive. Remove the drive from the external drive case and place it with the other drive. Put these away and keep them safe for a short while just in case.
Out of curiosity does the hardware/OS support booting from 1.5TB drives? I'm guessing it does otherwise you would not have bought them?
Tony

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