I followed the instructions and got the "Mount disk, then unmount it. If it doesn't work then use "-L" tag note." However your link didn't mention how to mount the drive. So I'm putting it in here for the next guy.
I followed space invaders 4 year old video.
In terminal
mkdir /tempxfs (Creates a temp folder to mount to)
mount /dev/mdX (x being your drive letter).
umount /tempxfs
rmdir /tempxfs (Delete the temp folder we just created)
run the XFS repair again.
Start the array to see if it worked.
You may still have "Drive disabled" with a little red X. To fix this:
- Stop array (take note of drive configuration)
- Select "no device" for effected drive(s).
- Start array (Should now say "not installed")
- Stop array and add the EXACT disk back in.
- Start array which will then initiate a rebuild.
