Prashant Subbarao wrote:
I wanted to determine which files were in either a "failed block
non-scraped" or "failed block bad-sector(s)". So what I did is I went
through the log file and, using sed, converted all the / to a -.
There is no need to change the '/' to '-'. Just use "--fill-mode=/-". Or
better yet, finish the rescue by removing the -n option, then fill the
bad sectors.
i executed this command:
ddrescue --force --fill-mode=l- tmpfile /dev/sdc rescue.JustPlusMinus.log
I was under the impression that ddrescue would *read* the mapfile
rescue.JustPlusMinus.log and write the string in tmpfile to every sector
marked - in the mapfile rescue.JustPlusMinus.log. *Did I do this correctly?*
Yes.
(Again, emphasis my own.) I am concerned because the mapfile
rescue.JustPlusMinus.log seems to have been overwritten and now looks like
this:
Ddrescue always compacts the mapfile by joining adjacent blocks with the
same status. As you changed '/' to '-', you fooled ddrescue into
thinking that non-scraped sectors were bad sectors instead.
*Is *ddrescue* reading the mapfile *rescue.JustPlusMinus.log* and
overwriting it? Or has it stored all the bad sectors elsewhere (perhaps in
the MBR) and it's only writing to the mapfile **rescue.JustPlusMinus.log?*
http://www.gnu.org/software/ddrescue/manual/ddrescue_manual.html#Fill-mode
In fill mode mapfile is updated to allow resumability when interrupted
or in case of a crash, but as nothing is being rescued mapfile is not
destroyed. The status line is the only part of mapfile that is modified.
(Compaction is not considered modification).
Best regards,
Antonio.
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