Graham:I suggest you download this free drive imaging utility
http://www.macrium.com/reflectfree.asp
and image each drive in your practice so that you can readily restore from these type of events.
Hard
drives fail at the rate of 4-15% per annum It doesn't take much math
to figure out how long before you have another such event.
I am impressed with the extremely reasonable Windows 2003 Server prices. Seems similar to Acronis True Image but much more reasonably priced.