Hello Oleg, of course feature requests are allowed here. :-)

Oleg Krutov wrote:
1) I noticed that when copying clusters that are non-4KB-aligned (eg,
because of bad blocks), copying speed considerably slows down and manually
aligning copying area one can achieve a full speed

Maybe you are trying to read 512-byte sectors from a disc with 4096-byte sectors. In this case --block-size=4096 should give you full speed.


2) Although I don't think that feature will be in great demand, maybe there
are folks like me :) that use ddrescue for different tricky things (eg,
external generation of log files for copying by one physical head at a time
etc.) Making these things, there is a need to introduce one more state for
disk area, say, "ignored" - it means, that no actions need to be performed
with this area at all, just skip it during copying and leave intact this
record in logfile.

Please, read this thread[1] and comment back any improvement you have to the solution proposed there. We have yet to determine what is the best way (if any) to set the minimum size of a regular output file when using the option --domain-logfile.

[1]https://lists.gnu.org/archive/html/bug-ddrescue/2011-05/msg00010.html


Best regards,
Antonio.

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