I have a 2TB external drive that will not boot. I boot a simaler drive and while it slept I put the board on corrupt drive and ran testdisk. no boot record or backup record was found. rebuild function read the mtf (about 16 hours) but could not boot drive. Any ideas on how to get data off drive?
More aboutboot master record
try a partition recovery software
Restore from backup! You do have a backup right? The only other thing you can do is some type of disk recovery which will be a long process, and will still probably not get everything.