Date: Thu, 18 Mar 2010 13:18:04 +0100 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: Pieter de Goeje <pieter@degoeje.nl> Cc: freebsd-current@freebsd.org, Miroslav Lachman <000.fbsd@quip.cz> Subject: Re: A tool for remapping bad sectors in CURRENT? Message-ID: <86r5nhj01v.fsf@ds4.des.no> In-Reply-To: <201003181234.10667.pieter@degoeje.nl> (Pieter de Goeje's message of "Thu, 18 Mar 2010 12:34:10 %2B0100") References: <20100308102918.GA5485@localhost> <4BA20088.3050006@quip.cz> <86vdctkhpw.fsf@ds4.des.no> <201003181234.10667.pieter@degoeje.nl>
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Pieter de Goeje <pieter@degoeje.nl> writes: > Dag-Erling Sm=C3=B8rgrav <des@des.no> writes: > > And if you're comfortable *writing* kernel code, I would suggest > > implementing WORF in geom_mirror :) > I am intrigued, what is this WORF you speak of? Write On Read Failure. It means that if you can't read a sector but you have (or can recreate) a copy of the data that's supposed to be on it, you rewrite that data to force the disk to reallocate the sector. I've done this manually several times (dd'ed a sector from the other disk in a mirror). I believe I even posted the procedure at some point; I'll check my archive. DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no
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