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Date: Tue, 21 Jan 2014 15:18:25 +0400
From: "Andrey V. Elsukov" <bu7cher@yandex.ru>
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To: Andriy Gapon <avg@FreeBSD.org>, Thomas Hoffmann <trh411@gmail.com>, 
 freebsd-current <freebsd-current@FreeBSD.org>
Subject: Re: Problem updating bootcode on ZFS on root system with MBR
References: <CAB7-odnL13m-Pnf3R6YvidVx3ycHt7F+Kk5TW2K9CjzYWy5evA@mail.gmail.com>
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On 21.01.2014 14:45, Andriy Gapon wrote:
>>> What do I need to do to get the boot2 code written to /dev/ada0s1a?
>>
>> This will work only if ada0s1a isn't in use. The debugflags trick works
>> only for whole disk, i.e. for geoms with rank=1. Another way is
>> calculate needed offset and write bootcode directly to ada0.
> 
> 
> And ultimately we should extend our ZFS interface with an ioctl to write a blob
> to a boot code area of a specified ZFS leaf vdev.  This would the right way to
> install zfsboot.

Hi Andriy,

do you have some patches to test? :-)

-- 
WBR, Andrey V. Elsukov