Date: Mon, 07 Sep 2009 11:39:21 +0200 From: Mark Stapper <stark@mapper.nl> To: Daniel Eriksson <daniel@toomuchdata.se> Cc: freebsd-questions@freebsd.org Subject: Re: ZFS and DMA read error Message-ID: <4AA4D4C9.3050707@mapper.nl> In-Reply-To: <4F9C9299A10AE74E89EA580D14AA10A635E9C8@royal64.emp.zapto.org> References: <4A9B731E.9050400@mapper.nl><ade45ae90908311122s685a6aa7o6dcc49a48c08000e@mail.gmail.com> <4A9CBDBB.3060403@mapper.nl> <4F9C9299A10AE74E89EA580D14AA10A635E9C3@royal64.emp.zapto.org> <4A9F8F96.3090806@mapper.nl> <4F9C9299A10AE74E89EA580D14AA10A635E9C8@royal64.emp.zapto.org>
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[-- Attachment #1 --] Daniel Eriksson wrote: > Mark Stapper wrote: > > >> Yeah, i did the long SMART selftest three times now, each of which it >> failed on the same LBA address. >> > > I assume 'smartctl -a /dev/adX' reports that the read test failed at LBA > XXX something? > Indeed it does. Always with the same LBA code/sector/address or whichever. > >> Why would I want to clear my driver before I run these tests? >> > > In this case it's not really clearing the drive you are aiming for, it > is to write to every sector. If you have a failed sector (which you do), > writing to it will force the drive firmware to remap the sector. As far > as I know, most drives will not remap an unreadable sector until it is > written to. > So I see. Could this be why I haven't had any read errors anymore? (After the zpool scrub that is) > /Daniel Eriksson > [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkqk1MwACgkQN9xNqOOVnWAL3ACgjOp533CzWDX6JEN4jlc+zegf xIMAn2TvwObkK5ohE3H2VfhJmzwqN5O0 =n8a0 -----END PGP SIGNATURE-----
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