When new versions of operating systems come out sometimes articles need to be updated. It’s always nice when someone else does the hard part. Recently, Ben Levy, an Apple Consultant from Los Angeles, did some work on an article I did awhile back. To quote Ben, the new procedure is to:
1. Boot from something other than your intended RAIDed boot drive, open Terminal and use diskutil list to identify the relevant disks and partitions.
2. diskutil appleRAID enable mirror disk0s2 – (assuming correctly identified slice, yours may be different) This command turns your primary disk into a RAID mirror without a mirror
3. Reboot back to your boot drive
4. diskutil checkRAID and diskutil list just so you know where and what everything is…
5. diskutil AppleRAID add member disk2 8014A446-E10D-4BC9-A199-67362E54FB7C – (assuming disk2 is in fact the drive you are adding) the UUID is the UUID of the RAID as discovered in checkRAID
6. diskutil checkRAID should now show it rebuilding the RAID. This could take hours. You can check on the progress again using the same command.
Thanks to Ben for the hard work. Now, I think it’s about time I wrapped this into a GUI app…