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Date:      Mon, 6 Jan 2003 20:14:30 +0100
From:      marius@alchemy.franken.de
To:        Soeren Schmidt <sos@spider.deepcore.dk>
Cc:        marius@alchemy.franken.de, Nate Lawson <nate@root.org>, current@FreeBSD.ORG
Subject:   Re: mirrored root fs?
Message-ID:  <20030106201430.R35928@newtrinity.zeist.de>
In-Reply-To: <200301061908.h06J89Pa024463@spider.deepcore.dk>; from sos@spider.deepcore.dk on Mon, Jan 06, 2003 at 08:08:09PM %2B0100
References:  <20030106200346.A577@newtrinity.zeist.de> <200301061908.h06J89Pa024463@spider.deepcore.dk>

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On Mon, Jan 06, 2003 at 08:08:09PM +0100, Soeren Schmidt wrote:
> It seems marius@alchemy.franken.de wrote:
> > On Mon, Jan 06, 2003 at 07:29:51PM +0100, Soeren Schmidt wrote:
> > > It seems Nate Lawson wrote:
> > > > I'd like to have a mirrored root partition.  I tried ccd(4) but the boot
> > > > blocks couldn't find the fs.  Any idea how much work it would take to
> > > > enable booting a ccd root?  Also, does vinum already support this?
> > > 
> > > If you use ATA drives you can use atacontrol to make the mirror on 
> > > two ATA disks, but there are some gotcha's, see atacontrol(1)....
> > > 
> > 
> > Using non-raid controllers for building raid-arrays would be a cool feature
> > if `atacontrol rebuild` would work... Is there simple way, i.e. without
> > copying the content of the array to a temporary location, to recover from
> > disk-failures when doing raid1 on non-raid controllers ?
> 
> The problem is that if its the drive that on you primary channel that
> dies, not all BIOS's can be taught to boot from the other drive on 
> the secondary channel. The solution is to swap the drives...
> 

Well, and how would one rebuild the array after swaping the drive from the
secondary channel to the primary and hooking up a replacement drive to the
secondary channel or if one doesn't want to boot from the array at all ?


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