Date: Fri, 29 May 2009 08:31:54 +1000 From: Andrew Snow <andrew@modulus.org> To: Dmitry Marakasov <amdmi3@amdmi3.ru> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS scrub/selfheal not really working Message-ID: <4A1F10DA.5080905@modulus.org> In-Reply-To: <20090528132634.GG45258@hades.panopticon> References: <20090527155342.GA45258@hades.panopticon> <4A1DB3D1.6080003@modulus.org> <20090528132634.GG45258@hades.panopticon>
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Dmitry Marakasov wrote: >>> So, my question is why doesn't ZFS rewrite those sectors with READ >>> errors during scrub? >> Because of the transactional nature of ZFS it writes the fresh data in a >> different part of the disk and then marks the old bad sectors as free. > Ok, then why does read errors pop up again after scrub, while they > should have been recovered? Because your disk subsystem is broken and keeps returning new sets of bad sectors. - Andrew
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