Re: OT: finding damaged files on an XFS filesystem (Was Re: OT: fastest way to copy one drive to another)

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On Fri, 21 Sep 2018 12:12:26 +1000 Cameron Simpson <cs@xxxxxxxxxx> wrote:

> On 20Sep2018 19:06, Ranjan Maitra <maitra@xxxxxxxxx> wrote:
> >I am sorry to return to this, but I am still struggling to find out the answer 
> >to how to find files that had bad blocks in my old drive.
> >
> >To recap, in order to rescue a failing disk with an xfs filesystem, I used ddrescue to copy the contents to an identically sized, but healthy disk.
> >The mapfile from ddrescue clearly indicated several bad sectors.
> >
> >ddrescue on the new disk found no problems, but I know there are affected files (the source disk was over 95% full), and I would like to know what those files are called.
> 
> See "man xfs_db". It looks like the "blockget -v -b block-number" command may 
> provide useful info.

Thanks very much for this information: it is very helpful.

I do know the bytes and can figure out the sectors that are damaged. But I can't figure out how that translates to the block number of an xfs filesystem. Is there any reference for how to do this?

Best wishes,
Ranjan
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