I found a way - thanks to contributors at forum.Knoppix.net
http://knoppix.net/forum/threads/29779-Knoppix-does-not-recognize-sata-drive-on-usb-adapter
Knoppix is a version of Linux. Their website has an iso download that you can burn to disk in the language of your choice.
To burn the CD I used CDBurnerXP. This is free on the internet and has the redeeming quality of being very simple to use... and when used... it works!
Once your machine is booted in Knoppix, the rest of the steps using the command line are nicely spelled out in the knoppix thread above. In English, the steps taken are:
1) Boot the PC using the Knoppix disk
2) Plug in one of the drives from your Buffalo Unit using a USB Drive Adapter
3) Plug in another external drive to copy the data to (if the local PC drive does not have room)
4) Find the name of the partition with the data using the command line tools described in the thread
5) Deactivate the RAID 1 for that partition using the command line
6) Mount the drive
7) Open the Knoppix file manager (located under Accessories) to view the files you want
8) Copy and Paste as desired
9) unmount the drive using the command line
10) Stop the drive using the command line
Hope this proves helpful to anyone else that encounters this situation.
Tomster2