Date: Thu, 6 Apr 1995 11:18:07 -0500 (CDT) From: Joe Greco <jgreco@brasil.moneng.mei.com> To: henrich@crh.cl.msu.edu (Charles Henrich) Cc: freebsd-hackers@FreeBSD.org Subject: Re: large filesystems/multiple disks [RAID] Message-ID: <9504061618.AA13152@brasil.moneng.mei.com> In-Reply-To: <199504061544.IAA29924@freefall.cdrom.com> from "Charles Henrich" at Apr 6, 95 11:44:37 am
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> >How about disk mirroring ? If you have a _mirrored_ database on two 2G > >disks and then add 2x2G (or may be 1x4G) and get spanned mirrored database. > >You get reliability due to mirroring and easy expansion due to spanning. > > That would be most entirely useful. These days with disk prices being what > they are, mirroring is cheaper than a true RAID solution (heck of alot faster > too :) So, technical merits of striping vs. mirroring vs. RAID aside, does anybody have a pointer to a sample implementation of *anything*? I was looking at the DEC ULTRIX ds driver man page this morning, and it sounds like a fairly simple and easy strategy to follow, although not particularly flexible. Does anyone know of anything like this that's already out there? ... Joe ------------------------------------------------------------------------------- Joe Greco - Systems Administrator jgreco@ns.sol.net Solaria Public Access UNIX - Milwaukee, WI 414/342-4847
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