Date: Mon, 29 Jun 2009 13:15:12 +0300 From: Dan Naumov <dan.naumov@gmail.com> To: "Patrick M. Hausen" <hausen@punkt.de> Cc: FreeBSD Stable Mailing List <freebsd-stable@freebsd.org> Subject: Re: Zpool on raw disk and weird GEOM complaint Message-ID: <cf9b1ee00906290315q68102c20u22aa7b0ffaf40c73@mail.gmail.com> In-Reply-To: <20090629094359.GB24054@hugo10.ka.punkt.de> References: <20090629094359.GB24054@hugo10.ka.punkt.de>
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On Mon, Jun 29, 2009 at 12:43 PM, Patrick M. Hausen<hausen@punkt.de> wrote: > Hi, all, > > I have a system with 12 S-ATA disks attached that I set up > as a raidz2: > > %zpool status zfs > =A0pool: zfs > =A0state: ONLINE > =A0scrub: scrub in progress for 0h5m, 7.56% done, 1h3m to go > config: > > =A0 =A0 =A0 =A0NAME =A0 =A0 =A0 =A0STATE =A0 =A0 READ WRITE CKSUM > =A0 =A0 =A0 =A0zfs =A0 =A0 =A0 =A0 ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0= 0 > =A0 =A0 =A0 =A0 =A0raidz2 =A0 =A0ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0 0 > =A0 =A0 =A0 =A0 =A0 =A0da0 =A0 =A0 ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0= 0 > =A0 =A0 =A0 =A0 =A0 =A0da1 =A0 =A0 ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0= 0 > =A0 =A0 =A0 =A0 =A0 =A0da2 =A0 =A0 ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0= 0 > =A0 =A0 =A0 =A0 =A0 =A0da3 =A0 =A0 ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0= 0 > =A0 =A0 =A0 =A0 =A0 =A0da4 =A0 =A0 ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0= 0 > =A0 =A0 =A0 =A0 =A0 =A0da5 =A0 =A0 ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0= 0 > =A0 =A0 =A0 =A0 =A0 =A0da6 =A0 =A0 ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0= 0 > =A0 =A0 =A0 =A0 =A0 =A0da7 =A0 =A0 ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0= 0 > =A0 =A0 =A0 =A0 =A0 =A0da8 =A0 =A0 ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0= 0 > =A0 =A0 =A0 =A0 =A0 =A0da9 =A0 =A0 ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0= 0 > =A0 =A0 =A0 =A0 =A0 =A0da10 =A0 =A0ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0= 0 > =A0 =A0 =A0 =A0 =A0 =A0da11 =A0 =A0ONLINE =A0 =A0 =A0 0 =A0 =A0 0 =A0 =A0= 0 > > errors: No known data errors I can't address your issue at hand, but I would point out that having a raidz/raidz2 consisting of more than 9 vdevs is a BAD IDEA (tm). All SUN documentation recommends using groups from 3 to 9 vdevs in size. There are known cases where using more vdevs than recommended causes performance degradation and more importantly, parity computation problems which can result in crashes and potential data loss. In your case, I would have the pool built as a group of 2 x 6-disk raidz. Sincerely, - Dan Naumov
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