On 02/06/2018 07:14 PM, Marc MERLIN wrote:
> So, I have 2 drives on a 5x6TB array that have respectively 1 and 8
> pending sectors in smart.
>
...
> # 3 Extended offline Completed: read failure 90% 289
1287409520
I have successfully used "badblocks" to overwrite bad sectors.
The variety of badblocks that comes with RHEL (there may be others!)
could be used with e.g.
badblocks -svnb512 /dev/sdh 1287409599 1287409400
where
-n Use non-destructive read-write mode. By default only a
non-destructive read-only test is done. This option must not be
combined with the -w option, as they are mutually exclusive.
I've adjusted the last-block and first-block numbers in the command
above so that they
a) encompass the known bad blocks
b) start and end on 4k-boundaries
This command leaves those blocks intact that still can be read.
After that, use a destructive-write badblocks e.g.
badblocks -sfvwb512 /dev/sdh <x> <y>
You'll have to adjust x and y to match just those blocks that cannot be
read, based on the output of the first badblocks run.
Afterwards, "smartctl -t short /dev/sdh" may clean up the SMART statistics.
HTH,
Kay
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