[Bug-ddrescue] Feature Request -- ipos stop point aka breakpoint

[Michael Darling]

Hi,

First, thank you very much for your continued work on this program!  I have already gotten a lot of data off of my drive.  It had a head problem that caused some platter damage.  After swapping the head in a cleanroom, I'm in the process of still getting data off.

There are a few spots on the drive that when attempted to be read cause the disk to lock up.  Nothing can see the drive anymore until I reboot.  Trying the spot(s) again cause another lockup.

Right now, I'm keeping track of different --input-position's, and rebooting a lot.  For example, If I have a lockup at 2516M, I'll reboot and try at 2550M and search backward how close I can get before locking up.

Now let's say that I have some errors between 2000M and 2516M that I want to retry.  I already know that hitting 2516M would cause a lockup.  If I could specify to stop program execution at 2515M, that would save me a few additional reboots.  I don't see a way to do this with existing options.  I can't use --max-size because I don't know how many if any errors between 2000M and 2515M will be read.

Thanks!

Mike