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Date:      Mon, 23 Jan 2012 21:46:43 +0000
From:      Matthew Seaman <m.seaman@infracaninophile.co.uk>
To:        Steven Hartland <killing@multiplay.co.uk>
Cc:        Olivier Smedts <olivier@gid0.org>, freebsd-stable@freebsd.org
Subject:   Re: ZFS: i/o error - all block copies unavailable on large disk number machines
Message-ID:  <4F1DD543.9070801@infracaninophile.co.uk>
In-Reply-To: <8270FFAE3BF447C380F5A414FFA9A9D2@multiplay.co.uk>
References:  <520B9285BCC0498286196195933D67E9@multiplay.co.uk><CB4ED392-3DED-40C1-83B0-7DB3B9C612C0@mac.com><4F1DA991.1060601@infracaninophile.co.uk><7F1E17105173440B8C52DB9AAFA7A400@multiplay.co.uk><4F1DBA47.8080504@infracaninophile.co.uk> <CABzXLYNhiQJsMhFAsHorwpifDX1f_n5EhCL2yhQySg=QuksnvQ@mail.gmail.com> <8270FFAE3BF447C380F5A414FFA9A9D2@multiplay.co.uk>

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On 23/01/2012 20:47, Steven Hartland wrote:
>>> In my case, I fixed it by having a separate /boot on some USB sticks =
--
>>> this was only ever accessed to read the kernel, kernel modules and
>>> bootloader at boot time, so no worries over performance.
>=20
> Out of interest whats the procedure you used for that Matthew?
>=20

It was basically this: http://wiki.freebsd.org/RootOnZFS/UFSBoot
but I already had a system installed on the ZFS, so Section 2 of that
was pretty much a no-op for me.

I built the USB sticks offline, then went into the datacenter with them
to revive that server.  I can't remember now whether I just had two
bootable USB sticks -- one to use, and one as a spare -- or whether I'd
made a gmirror from the two.  Seeing as they were something like =A38
apiece having several on hand was easily justifiable.

	Cheers,

	Matthew


--=20
Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
                                                  Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey     Ramsgate
JID: matthew@infracaninophile.co.uk               Kent, CT11 9PW


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