boot code compatibility with ZFS

[Ali Mashtizadeh]

HEAD and 8-STABLE have support for booting off of raidz volumes.
8-STABLE this was merged in 204251.

On Sat, Mar 27, 2010 at 3:28 PM, Aristedes Maniatis <ari at ish.com.au> wrote:
> FreeBSD has recently been able to boot directly from ZFS as deailed here:
>
>  http://wiki.freebsd.org/RootOnZFS
>
> Naturally having functional boot code has been key to this, but it is very
> confusing as to why sometimes I can get FreeBSD to boot nicely and sometimes
> not. From comments in threads and my experience, I've got the following
> rough timeline:
>
> FreeBSD 7.1: ZFS version 6, no ZFS boot capability
> FreeBSD 7.2: ZFS version 6, zfsboot only, boot from single vdev pool only
> FreeBSD 7.3: ZFS version 13, zfsboot broken, no ZFS boot capability
>
> FreeBSD 8.0: ZFS version 13, gptzfsboot and zfsboot, boot from mirrored pool
> or single vdev, RAIDZ not supported, degraded pool not supported
>
>
> My questions:
>
> 1. Is the above list correct?
>
> 2. What is the situation for the two stable branches?
>
> 3. In an effort to get a machine booting properly I tried installing the
> boot code from 8-STABLE with a 8.0 kernel. That didn't work. What is the
> situation with backward and forward compatibility of the boot code? Will
> there come a time when an OS update will require an update of the boot code?
>
>
> If someone were able to put these answers on the wiki page as well, I
> believe this would help others.
>
>
> Thanks
> Ari Maniatis
>
> --
> -------------------------->
> Aristedes Maniatis
> ish
> http://www.ish.com.au
> Level 1, 30 Wilson Street Newtown 2042 Australia
> phone +61 2 9550 5001   fax +61 2 9550 4001
> GPG fingerprint CBFB 84B4 738D 4E87 5E5C  5EFA EF6A 7D2E 3E49 102A
>
> --
> -------------------------->
> Aristedes Maniatis
> ish
> http://www.ish.com.au
> Level 1, 30 Wilson Street Newtown 2042 Australia
> phone +61 2 9550 5001   fax +61 2 9550 4001
> GPG fingerprint CBFB 84B4 738D 4E87 5E5C  5EFA EF6A 7D2E 3E49 102A
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-- 
Ali Mashtizadeh
علی مشتی زاده