Date: Mon, 6 Jan 2003 20:49:50 +0100 From: marius@alchemy.franken.de To: Soeren Schmidt <sos@spider.deepcore.dk> Cc: Nate Lawson <nate@root.org>, current@FreeBSD.ORG Subject: Re: mirrored root fs? Message-ID: <20030106204950.S35928@newtrinity.zeist.de> In-Reply-To: <200301061936.h06JaKma029730@spider.deepcore.dk>; from sos@spider.deepcore.dk on Mon, Jan 06, 2003 at 08:36:20PM %2B0100 References: <20030106201430.R35928@newtrinity.zeist.de> <200301061936.h06JaKma029730@spider.deepcore.dk>
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On Mon, Jan 06, 2003 at 08:36:20PM +0100, Soeren Schmidt wrote:
> It seems marius@alchemy.franken.de wrote:
> > > > 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 ?
>
> You can boot off the half-mirror and the rebuild with atacontrol once
> the system is up (its done in the background so you can continue to
> run but access speed will be degraded).
And how is this to be done ? :) `atacontrol rebuild ar0` didn't work
here ("not configured" IIRC) with a raid1-array on a non-raid controller
and atacontrol(8) also states:
rebuild Rebuild a RAID1 array on a RAID capable ATA controller.
> If you want to not use the array you just delete it with atatcontrol
> and the disk will be seen as a normal ATA drive again.
>
I recovered by copying the content of the half-mirror to another location,
unmounting ar0, `atacontrol create ar0 ...` after replacing the broken
drive, ..., and finally copying the data back to the array. A simpler
way would be fine.
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