Date: Fri, 14 Dec 2007 13:13:33 +0100 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: freebsd-fs@freebsd.org Subject: Re: RAID 1 via ataraid(4) Message-ID: <864pelzd76.fsf@ds4.des.no> In-Reply-To: <20071210201734.GA16012@VARK.MIT.EDU> (David Schultz's message of "Mon\, 10 Dec 2007 15\:17\:34 -0500") References: <20071210201734.GA16012@VARK.MIT.EDU>
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David Schultz <das@FreeBSD.ORG> writes: > I'm looking at getting a new box and wondering what people's > experiences are with mirroring via ataraid(4) and various > motherboards. Does it work? Yes, it works, but GEOM works better (unless you want to stripe the disk you boot from) > At the moment I'm using gmirror (previously ccd until GEOM came > along and ccd became unstable) with a dedicated unmirrored OS > disk. But in accordance with Murphy's law, I've had the boot disk > fail twice in the past five years, so I'd like to put the damn > root fs on the mirror. Just gmirror the boot disk, and make sure gmirror is either compiled into the kernel or loaded at boot time (gmirror_load=3D"YES" in /boot/loader.conf). You don't need BIOS support to boot from a mirror set, unless the primary fails badly enoush that you can't boot from it but not so badly that the BIOS will ignore it. DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no
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