Quick update: The new drives are in and built. I have installed Debian and copied over the bulk of the data files from the backup drive. I am now looking at trying to get all the various bits and pieces of software back and running the way they did before (there are a lot of them - e.g. currently working on the source control system, subversion). This is not trivial, as I am also upgrading to a newer version of Debian, and things always seem to work a little differently, so it's not just a matter of copying everything back over. It will probably be tomorrow at least before I have everything running properly again. Sorry it is taking longer than I thought... just building the new RAID array this afternoon took over three hours, and then I had problems with Debian not recognizing the CD-ROM drive, then not able to make a 4TB partition, then Grub wouldn't install in the MBR... seemed like obstacles at every stage. Still, we're getting there. Again, my apologies...