Problems with home server

[Ed]

Are you doing nightly backups? I know who does...  :(

First - image that disk, set the image up as a loopback mount and work
on that - with any luck you can get the encrypted partition to open in
LVM, if so - get what you can out of it.
then look into dd, ddrescue and dd_rescue - using them on an encrypted
LVM mount gets complicated as support varies.
for some reason Foremost comes to mind, but I think Testdisk is
better. http://en.wikipedia.org/wiki/Testdisk
Testdisk has a habit of going off the end of a file system, it loops
back to /.  So, if you pull a terabyte off a 500gig drive, that just
means you have to walk the tree manually.

good luck - and just be happy it wasn't a fakeraid mirror..