It was the backup. :(
I don't think it was a RAID. The two drives are each 500GB, making a total of 1 TB. I do not know if that is a RAID 0 or not.
I have read that WD encrypts the externals, but I don't think this type. I put no encryption on it.
I am looking for help recovering my data from a Western Digital external hard drive. I removed the drives and installed them in a tower and ran smart tests and bechmarks on them, and they are both fine. The problem I have is getting the partition back or to mount. Linux says unknown partition...