amd64/160801: zfsboot on 8.2-RELEASE fails to boot from
root-on-zfs in MBR slice
John Baldwin
jhb at freebsd.org
Mon Sep 19 12:20:05 UTC 2011
The following reply was made to PR kern/160801; it has been noted by GNATS.
From: John Baldwin <jhb at freebsd.org>
To: freebsd-amd64 at freebsd.org
Cc: Camillo SXrs <ged at iki.fi>,
freebsd-gnats-submit at freebsd.org
Subject: Re: amd64/160801: zfsboot on 8.2-RELEASE fails to boot from root-on-zfs in MBR slice
Date: Mon, 19 Sep 2011 08:02:59 -0400
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 at 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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