That's too bad, but words are not enough to describe the dismay things like this cause. I have 2 pc's and an external drive, which I use to backup from my working machine. So I always have 3 copies of everything. So I double Calico.
Regarding recovery; I once had a ticking (dying) drive and purchased Active File Recovery, which worked very well, and wasn't very expensive. Managed to pull out most stuff before it totally crashed.
I now have messed up the partitions on my external drive in an attempt to change their sizes, so it's now totally unreadable, even from the BIOS or XP setup cd. Any advise on getting it reformatted is welcome, by the way, but I already ordered another external drive.
Good luck, folder!