From mboxrd@z Thu Jan  1 00:00:00 1970
From: Phil Turmel <philip@turmel.org>
Subject: Re: Does a "check" of a RAID6 actually read all disks in a stripe?
Date: Tue, 28 Apr 2020 10:41:29 -0400
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To: Brad Campbell <lists2009@fnarfbargle.com>, linux-raid@vger.kernel.org
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On 4/28/20 10:00 AM, Brad Campbell wrote:
> 
> On 28/4/20 9:47 pm, Phil Turmel wrote:

>> The bad block log misfeature is turned on.  Any blocks recorded in it 
>> will never be read again by MD, last I looked.  This might explain 
>> what you are seeing.
>>
>>
> While I see where you are going, the fact it corrected the bad sector by 
> re-writing it during the re-build would intimate that isn't/wasn't the 
> case.

Ah, yes.  Any chance you have set the sysfs sector limits on a check and 
haven't reset them?

Phil