From mboxrd@z Thu Jan  1 00:00:00 1970
From: pg@lxra2.for.sabi.co.UK (Peter Grandi)
Subject: Re: read errors not corrected when doing check on RAID6
Date: Sun, 12 Jan 2014 16:49:27 +0000
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[ ... ]
> So here now in the replace function, md decided to correct the
> read errors on /dev/sds. Now the pending sectors are down to 7
> on /dev/sds. There were some more errors which were also
> corrected, and now the pending count is down to 5. Recovery is
> still ongoing. [ ... ]  I expected it to correct the read
> errors on the drive then, but it seems it didn't. [ ... ]

That seems to me a big misunderstanding (or delusion).