Re: [Bug-ddrescue] A way to check if ddrescue did a good job?

[Antonio Diaz Diaz]

Hello Théo, sorry for the late answer.

Théo Koelz wrote:
> Again not a bug, just a question (and maybe a suggestion). Ddrescue now
> claims to have successfully rescued my hard drive, awesome, but a few
> strange things happened and that makes me doubtful
[...]
> I rebooted again and started to
> rescue the bad sectors (ddrescue -d -f -r3 ...) and surprisingly things
> went smoothly and it was done in like 2 days with only a small bad
> sector of 452608B that couldn't be recovered

Perhaps the last time it went smoothly because you used direct mode (-d).


> Maybe everything is well and I've been lucky, but as I said I'm a bit
> doubtful and would like to know if there's a way to check if ddrescue
> did a good job or not
[...]
> (one way
> to check this quickly could be to select a few random places on both
> disks and compare them, but maybe some other software already does
> that?).

Ddrescue can't currently make such checks directly, but I plan to 
implement some kind of verification pass. The idea of reading from 
random places seems a good one.


> As usual thanks in advance, you've been very helpful.

You are welcome.

Antonio.