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Date:      Tue, 16 Feb 2010 13:18:22 +0200
From:      Dan Naumov <dan.naumov@gmail.com>
To:        freebsd-questions@freebsd.org, freebsd-fs@freebsd.org
Subject:   RE: booting off a ZFS pool consisting of multiple striped mirror  vdevs
Message-ID:  <cf9b1ee01002160318t2a98fcfp4fb94a6f184a81d1@mail.gmail.com>
In-Reply-To: <cf9b1ee01002160038o25e17bc8sd54e66be7c67f859@mail.gmail.com>
References:  <cf9b1ee01002160038o25e17bc8sd54e66be7c67f859@mail.gmail.com>

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> I don't know, but I plan to test that scenario in a few days.
>
> Matt

Please share the results when you're done, I am really curious :)


> It *should* work... I made changes a while back that allow for multiple
> vdevs to attach to the root. =A0In this case you should have 3 mirror
> vdevs attached to the root, so as long as the BIOS can enumerate all of
> the drives, we should find all of the vdevs and build the tree
> correctly. =A0It should be simple enough to test in qemu, except that the
> BIOS in qemu is a little broken and might not id all of the drives.
>
> robert.

If booting of a stripe of 3 mirrors should work assuming no BIOS bugs,
can you explain why is booting off simple stripes (of any number of
disks) currently unsupported? I haven't tested that myself, but
everywhere I look seems to indicate that booting off a simple stripe
doesn't work or is that "everywhere" also out of date after your
changes? :)


- Sincerely,
Dan Naumov



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