Date: Mon, 19 Dec 2011 19:17:36 +0100 From: Stefan Esser <se@freebsd.org> To: Olivier Smedts <olivier@gid0.org> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: Uneven load on drives in ZFS RAIDZ1 Message-ID: <4EEF7FC0.8030801@freebsd.org> In-Reply-To: <CABzXLYNgFh6T2oRNosdh9mb8Bu7D2xcT3styK9sFdywhHv6D2w@mail.gmail.com> References: <4EEF488E.1030904@freebsd.org> <CABzXLYNgFh6T2oRNosdh9mb8Bu7D2xcT3styK9sFdywhHv6D2w@mail.gmail.com>
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Am 19.12.2011 15:36, schrieb Olivier Smedts: > 2011/12/19 Stefan Esser <se@freebsd.org>: >> So: Can anybody reproduce this distribution requests? > > Hello, > > Stupid question, but are your drives all exactly the same ? I noticed > "ashift: 12" so I think you should have at least one 4k-sector drive, > are you sure they're not mixed with 512B per sector drives ? All drives are identical: <SAMSUNG HD204UI 1AQ10001> at scbus3 target 0 lun 0 (ada0,pass2) <SAMSUNG HD204UI 1AQ10001> at scbus4 target 0 lun 0 (ada1,pass3) <SAMSUNG HD204UI 1AQ10001> at scbus5 target 0 lun 0 (ada2,pass4) <SAMSUNG HD204UI 1AQ10001> at scbus6 target 0 lun 0 (ada3,pass5) These are 4KB sector drives. Everything is correctly aligned and all drives have identical partition (created by a script that was run once for each drive, so there is no risk of typoes leading to differences). Regards, STefan
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