I am writing this in case it helps others.
The system/bootimage partitions on my Terastation Live hard drives got corrupted, and one drive got damaged, during an abrupt power loss and could not recover. The Buffalo support folks were very helpful, but together, we could not get the Terastation back up (I have to say they did their best to help me, and I did appreciate the 24/7 support).
There was no indication that any of my data in the shares were corrupted. After investigating data recovery companies (one company I talked to wanted $2000-$7000!), I ran across references to mounting the drive on a Linux server and recovering the data (which I am sure would have worked had I known how to do this), and also to software called UFS Explorer that could read XFS drives on a Windows PC. Thank god for internet.
I recovered all my data for about $100 using UFS explorer software for Windows and an external USB drive dock (Thermaltake BlacX 2.5"/3.5" HDD USB docking station). All I had to do was remove the drives from the TS, plug in the USB dock into the PC, plug in the SATA drive into the dock, run the UFS Explorer software on the PC, and then just copy the data!!
I was also lucky in that I was using RAID1 - I did not have to do any "rebuilding of the RAID array" in UFS Explorer because I was using RAID1 and each disk in the pair had all the data. In fact I recovered the data from both drives in a pair and compared them to ensure that there was no data corruption. I would certainly recommend use of RAID1 for its simplicity during recovery - yes, you do not get as much disk space as some other RAID configs, but disk space is CHEAP!
All in all, the data recovery cost me about a tenth of what I would have been willing to pay.
[In case you are wondering, I did have the TS on a UPC backup; in this case, I plugged in a Samsung Laser printer into the same UPC, and it overloaded the UPC, which caused it to shut down].
[After this incident, I also bought another NAS - Linkstation Live - and now have TS to LS backups twice daily. The two devices are on different UPCs on different circuits in my house].
Hope this is of help to somebody some day.