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Date:      Mon, 19 Sep 2011 17:07:26 +0300
From:      =?ISO-8859-15?Q?Camillo_S=E4rs?= <ged@iki.fi>
To:        John Baldwin <jhb@freebsd.org>
Cc:        freebsd-gnats-submit@freebsd.org, freebsd-amd64@freebsd.org
Subject:   Re: amd64/160801: zfsboot on 8.2-RELEASE fails to boot from root-on-zfs in MBR slice
Message-ID:  <4E774C9E.5070106@iki.fi>
In-Reply-To: <201109190802.59988.jhb@freebsd.org>
References:  <201109181301.p8ID1BdX023885@red.freebsd.org> <201109190802.59988.jhb@freebsd.org>

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Hi,

On 2011-09-19 15:02, John Baldwin wrote:
>> 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 merged 
> to 8 after 8.2-release.

Unfortunately fixing this issue by installing zfsboot from 9.0-BETA2 was
a surprising amount of work, because of an incompatibility between the
9.0 USB installer GPT and the BIOS on this system.  It took quite a
while to recognize the root cause for that one.  I simply cannot boot
the system in question with the GPT pmbr used on the memstick of 9.0.
The BIOS locks completely.

I am very reluctant to risk breaking my currently running system, the
previous boot failure caused almost two weeks of downtime.

Does the 8.2-stable memstick image still use MBR?  If so, I could
conceivably try to copy the 9.0 zfsboot version to the 8.2-stable
memstick and test both.

Regards,
Camillo



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