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Date:      Mon, 19 Sep 2011 08:02:59 -0400
From:      John Baldwin <jhb@freebsd.org>
To:        freebsd-amd64@freebsd.org
Cc:        freebsd-gnats-submit@freebsd.org, Camillo SXrs <ged@iki.fi>
Subject:   Re: amd64/160801: zfsboot on 8.2-RELEASE fails to boot from root-on-zfs in MBR slice
Message-ID:  <201109190802.59988.jhb@freebsd.org>
In-Reply-To: <201109181301.p8ID1BdX023885@red.freebsd.org>
References:  <201109181301.p8ID1BdX023885@red.freebsd.org>

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On Sunday, September 18, 2011 9:01:11 am Camillo SXrs wrote:
>=20
> >Number:         160801
> >Category:       amd64
> >Synopsis:       zfsboot on 8.2-RELEASE fails to boot from root-on-zfs in=
=20
MBR slice
> >Confidential:   no
> >Severity:       serious
> >Priority:       low
> >Responsible:    freebsd-amd64
> >State:          open
> >Quarter:       =20
> >Keywords:      =20
> >Date-Required:
> >Class:          sw-bug
> >Submitter-Id:   current-users
> >Arrival-Date:   Sun Sep 18 13:10:07 UTC 2011
> >Closed-Date:
> >Last-Modified:
> >Originator:     Camillo S=E4rs
> >Release:        8.2-RELEASE
> >Organization:
> >Environment:
> FreeBSD free 8.2-RELEASE FreeBSD 8.2-RELEASE #0: Thu Feb 17 02:41:51 UTC=
=20
2011     root@mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64
>=20
> >Description:
> /boot/zfsboot when installed fails to boot from root-on-zfs in MBR slice,=
=20
set up according to this:
>=20
> <http://wiki.freebsd.org/RootOnZFS/ZFSBootPartition>;
>=20
> I upgraded from 8.1 to 8.2-RELEASE, and consequently upgraded my zfs root=
=20
pool to version 15.  Upgraded the bootloader in Fixit prompt to allow booti=
ng=20
from v15 pool.  After this, the system fails to boot, and freezes after the=
=20
"Boot:  F1" prompt with "-" on the screen.  See this thread for example=20
screenshot:
>=20
> <http://forums.freebsd.org/showthread.php?t=3D22105>;
>=20
> MBR is used because of BIOS incompatibility with GPT as installed by=20
=46reeBSD.
> >How-To-Repeat:
> Set up root-on-ZFS in MBR slice on 8.2-RELEASE according to:
>=20
> <http://wiki.freebsd.org/RootOnZFS/ZFSBootPartition>;
>=20
> Reboot - system halts on "-".
> >Fix:
> Install zfsboot from 9.0-BETA2, where the problem is fixed.

Can you test 8.2-stable?  The various fixes made to zfsboot in 9 were merge=
d=20
to 8 after 8.2-release.

=2D-=20
John Baldwin



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