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Date:      Tue, 17 Nov 2009 12:51:45 -0600
From:      Scot Hetzel <swhetzel@gmail.com>
To:        Thomas Backman <serenity@exscape.org>
Cc:        current@freebsd.org
Subject:   Re: [PATCH] Build a separate ZFS-enabled loader.zfs
Message-ID:  <790a9fff0911171051u167c40fpf62deb8102fa0468@mail.gmail.com>
In-Reply-To: <F1E19C4E-DB2A-4E3E-A9FB-979058D136F0@exscape.org>
References:  <200911171017.58140.jhb@freebsd.org> <F1E19C4E-DB2A-4E3E-A9FB-979058D136F0@exscape.org>

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On Tue, Nov 17, 2009 at 9:26 AM, Thomas Backman <serenity@exscape.org> wrot=
e:
> On Nov 17, 2009, at 4:17 PM, John Baldwin wrote:
>
>> This patch is a workaround to enabling ZFS support by default in the boo=
t
>> loader. =A0It enables building a loader.zfs which is a ZFS-enabled loade=
r and
>> changing zfsboot and gptzfsboot to use /boot/loader.zfs instead
>> of /boot/loader. =A0I have only tested that things built ok, I have not
>> boot-tested it as I don't have ZFS setup anywhere. =A0The patch is avail=
able at
>> http://www.FreeBSD.org/~jhb/loader.zfs/. =A0You will also need to copy
>> the 'loader.zfs/Makefile' file from that URL into a new
>> sys/boot/i386/loader.zfs directory after applying the patch.
> If I may ask (and sorry for my ignorance, but): what problem does this wo=
rkaround solve?

This solution fixes boot issues on systems that are using ZFS to boot
FreeBSD.  Currently, if such a system uses the freebsd-update service
to update the system,  it receives a /boot/loader that doesn't support
booting from a ZFS root and breaks the boot process.

It also makes it easier to setup a Root On ZFS system, as you will no
longer need to add LOADER_ZFS_SUPPORT to /etc/src.conf and rebuilding
the /boot/loader.

Scot



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