Date: Tue, 7 Jan 2003 08:51:39 +0100 (CET) From: Soeren Schmidt <sos@spider.deepcore.dk> To: "Andrew P. Lentvorski, Jr." <bsder@allcaps.org> Cc: Nate Lawson <nate@root.org>, current@FreeBSD.ORG Subject: Re: mirrored root fs? Message-ID: <200301070751.h077pdhq057490@spider.deepcore.dk> In-Reply-To: <Pine.LNX.4.44.0301062258230.18310-100000@mail.allcaps.org>
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It seems Andrew P. Lentvorski, Jr. wrote: > On Tue, 7 Jan 2003, Soeren Schmidt wrote: > > > Not true, you can boot off a broken mirror on a non-RAID ATA controller, > > and then rebuild on the fly with atacontrol once the system is up > > Is this new (ie. since August 22, 2002)? I attempted to do this back then > and I couldn't actually get a rebuild to work for stock ATA controllers. > At that point, I kept getting: > atacontrol: ioctl(ATARAIDREBUILD): Operation not supported by device > > See: http://docs.freebsd.org/cgi/getmsg.cgi?fetch=698625+0+archive/2002/freebsd-stable/20020825.freebsd-stable > for details on my abortive attempts to get this to work. > > Will I get different results if I try this procedure again, now? > Alternatively, what did I do wrong in the original procedure? It should work on 4.7 forward, but its been a while since I played with it. Another thing is that its a pain to make a mirror on an already running system (which is often wanted), so I plan to add an option to atacontrol to tell where to get the master from, and then do an automatic rebuild during the create phase ie: atacontrol create RAID1 ad0 ad2 source ad0 This will create a mirror using ad0 and ad2, and start a rebuild to build the master with data from ad0. This way you can do a normal install, add a second (identical or bigger) disk, and make a mirror out of those. You just have to change your fstab before rebooting (ad0 -> ar0) in order to boot... -Søren To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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