Destroyed mirror RAID (1), Want to get data, but how?

I had a degraded mirrored RAID set that was functioning in its degraded state - reads and writes were no problem.
I thought that if I used DiskUtility to destroy the RAID, it would convert the drives to normal drives, and I would have access to each individually, but this was not the case. I also thought the data was backed up, but this was not the case.
I used the minus sign in the RAID tab DiskUtility to destroy the RAID. There are now 2 drives, but neither is able to be mounted:
bash-3.2# diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUIDpartitionscheme *698.6 Gi disk0
1: EFI 200.0 Mi disk0s1
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: GUIDpartitionscheme *698.6 Gi disk2
1: EFI 200.0 Mi disk2s1
2: Apple_HFS 698.3 Gi disk2s2
If I try to verify the first disk:
bash-3.2# diskutil verifyDisk disk0
Error encountered attempting to verify/repair disk0: Unrecognized filesystem (-9958)
but if I try to mount it, it thinks the mount is successful, but nothing new shows up on the Desktop, nor with "df"
bash-3.2# diskutil mountDisk disk0
Volume(s) mounted successfully
in reality, the drive is NOT "mounted successfully."
disk2 is in worse shape, as the OS is not even fooled into thinking it is mountable:
bash-3.2# diskutil mountDisk disk2
One or more volume(s) failed to mount
So I am trying to put my recovery efforts toward disk0.
Any ideas on how to mount the drive and get data off of it?

I had the same issue a few months back.
1 drive of my mirroed raid died. So I took the working drive out of that box and put it in a FW enclosure. It mounted fine. However after converting it back to a regular volume it would not mount. I tried everything thing I exhausted google searches.
the only fix was to reinitialise the drive. Luckily I had the data backed up elsewhere.

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