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Date:      Fri, 06 Jul 2001 06:30:36 +0200
From:      Poul-Henning Kamp <phk@critter.freebsd.dk>
To:        Peter Wemm <peter@wemm.org>
Cc:        Ben Smithurst <ben@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject:   Re: cvs commit: src/etc diskcheckd.conf 
Message-ID:  <12032.994393836@critter>
In-Reply-To: Your message of "Thu, 05 Jul 2001 14:53:24 PDT." <20010705215324.448BA3809@overcee.netplex.com.au> 

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In message <20010705215324.448BA3809@overcee.netplex.com.au>, Peter Wemm writes
:

>For what its worth, I have yet to see a modern drive that does do scrubbing
>of marginal data.  Ie: a soft error (ecc correctable) does not cause
>a writeback that I have ever seen.
>
>[...]
>
>I am not sure that the basic assumption behind diskcheckd is valid..  Is
>there any way to verify for sure that marginal sector scrubbing really
>happens on at least some drives?

diskcheckd is not designed or intended to do scrubbing, its goal has
been reached if it does detection.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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