AVCP
Quite possibly, although a format probably didn't help. There are companies who can work miracles with dead hard disks, but they are normally very expensive.
As an aside, if the disk has crashed once then I'd bin it even if a format seems to have brought it back to life. There's something wrong with the disk and unless it is pure scratch space (and as you're asking about backups then I'd guess that it isn't) then I wouldn't risk it happening again - it will.