Date: Tue, 13 Nov 2012 09:04:54 -0800 From: Garrett Cooper <yanegomi@gmail.com> To: Miroslav Lachman <000.fbsd@quip.cz> Cc: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: Re: RHEL to FreeBSD file server Message-ID: <F72D066D-5D13-46DE-A0F0-109B7FA679E3@gmail.com> In-Reply-To: <50A26DC6.1050205@quip.cz> References: <50A130B7.4080604@cse.yorku.ca> <20121113043409.GA70601@neutralgood.org> <50A266DA.2090605@cse.yorku.ca> <50A26DC6.1050205@quip.cz>
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On Nov 13, 2012, at 7:56 AM, Miroslav Lachman <000.fbsd@quip.cz> wrote: > Jason Keltz wrote: > [...] >=20 >> Presently, with the mirrors, I'm using 22 disks with leaving 2 hot spares= . >> If I used 6 x 4 disk vdevs, I use all the disks and don't have hot >> spares (though I have better redundancy) -- I could put spares into the >> R720 head which actually has 14 disk slots empty, but I'm hesitant to >> put a spare for the md1220 using a different driver in the head of the >> R720... >=20 > Beware of hot spares - they are not "hot". >=20 > kern/134491: [zfs] Hot spares are rather cold... > http://www.freebsd.org/cgi/query-pr.cgi?pr=3D134491 >=20 > This is long standing unsolved issue. You can add drives as "hot spares" t= o the zpool, but FreeBSD lacks daemon to recieve notifications about disk fa= ilure and failed drive will not be replaced by spare. You should be able to work around this on 9.1 with a zfs scrub once the driv= e has been pulled from the chassis, but I recommend testing this out first, j= ust to be safe. Cheers, -Garrett=
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