Date: Thu, 30 May 2002 17:13:44 +0930 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: Scott Long <scott_long@btc.adaptec.com> Cc: Eric Parusel <lists@globalrelay.net>, Matthew Dillon <dillon@apollo.backplane.com>, Scott Long <Scott_Long@adaptec.com>, Doug White <dwhite@resnet.uoregon.edu>, Cy Schubert - CITS Open Systems Group <Cy.Schubert@uumail.gov.bc.ca>, Kirk Strauser <kirk@strauser.com>, freebsd-stable@freebsd.org Subject: Re: Hardware RAID vs vinum Message-ID: <20020530171344.C49519@wantadilla.lemis.com> In-Reply-To: <20020530073031.GA3228@hollin.btc.adaptec.com> References: <2C7CBDC6EA58D6119E4A00065B3A24CB04636E@btcexc01.btc.adaptec.com> <20020529134211.L82424@wantadilla.lemis.com> <20020529141141.GC2262@hollin.btc.adaptec.com> <20020530090247.Y82424@wantadilla.lemis.com> <200205300016.g4U0GaBY064168@apollo.backplane.com> <010501c2079f$7b37bc80$64805718@cns> <20020530073031.GA3228@hollin.btc.adaptec.com>
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On Thursday, 30 May 2002 at 1:30:31 -0600, Scott Long wrote: > On Wed, May 29, 2002 at 11:01:46PM -0700, Eric Parusel wrote: >> Of course I'm definitely not expecting the world, just though I'd >> point this out :) By the way I'm using either RELENG_4_5 or -stable >> on my boxes... >> >> Oh, and a question: can software RAID mirrors (via vinum) >> be booted from? (and still booted from if one drive goes >> down?) > > I believe that you can boot a vinum RAID-1 array by having > the BIOS treat the master disk as a boot disk. Then during > the boot process, vinum will start and recognise the mirror, > allowing you to mount it as root. I had this code working a couple of years ago, but people didn't like the look of the code, and I never got round to doing it properly. It's still at the top of my tuit queue. > This cannot work for a striped array, because the BIOS has no idea > of how that kind of thing works. Correct. Of course, if you're mirroring (and that's the only reason I can think of for doing this in the first place), then only one of the plexes has to be concatenated. Again, though, striped root file systems don't seem to make much sense. Greg -- See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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