I'm currently in the business of recovering data from a damaged---and dying---hard-drive (check this question for background info). The damaged hard-drive is 250GB, and I intend to use
ddrescue to clone what is left of the disk (as suggested in How to clone a NTFS partition (WinXP) from a damaged disk to a new one?).
For such a cloning operation, is a healthy 250GB external hard-drive sufficient? Or must the drive be bigger than that (say, 320GB)? And if the damaged source disk is indeed one sector larger than the healthy destination disk, how exactly could this impact/confuse
In the end I got the new disk and it is sector for sector the same size as the damaged disk: 488397168 sectors.