Is there any hope of resurrecting the data? Some programs can even rescue some data after a drive has been formatted.
Try GetDataBack
http://www.runtime.org/gdb.htm
If the crash was done by a viral agent, ( harddrivekiller is mean ) then you have to identify it and search for an anti.
This applies only if you haven't formatted the drive completely again, but as I said it might be possible to GetDataBack, using GetDataBack...
Tell me if you need help,
Mithril