[Gllug] JFS and bad blocks

[Rich Walker]

pg_gllug at gllug.to.sabi.co.UK (Peter Grandi) writes:

>
>   * 'fsck.* -c' is most useful for recovery; a (usually slow)
>      alternative for recovering stuff on bad media is to use
>
>        dd bs=512 conv=sync,noerror
>
>      which will create an image copy of the partition with all
>      bad sectors replaced with zero sectors, and one that can
>      often be successfully 'fsck.* -f'.

I think you mean dd_rescue

which will do repeated reading to try and get the job done.

If you want the zero-on-error behaviour, it will do that too.

dd_rescue has the nice property of reading big chunks of data, and then
falling back to reading small chunks of data on the erroneous bits.

cheers, Rich.


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