From owner-freebsd-hackers@FreeBSD.ORG  Wed May 22 14:04:47 2013
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Date: Wed, 22 May 2013 18:02:25 +0400
From: "Andrey V. Elsukov" <ae@FreeBSD.org>
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To: John Baldwin <jhb@freebsd.org>
Subject: Re: zfsloader triggering reset when interacting with v86int()
References: <519C3256.7020409@freebsd.org> <201305220902.34716.jhb@freebsd.org>
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Cc: Lawrence Stewart <lstewart@freebsd.org>, dim@freebsd.org, avg@freebsd.org,
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On 22.05.2013 17:02, John Baldwin wrote:

>> I'm in well over my head here so I'm interested to hear thoughts on
>> point 2 and/or any other theories about possible FreeBSD causes of the
>> reset I'm seeing on the off chance my BIOS isn't actually at fault.
>> Willing to test ideas/patches.
> 
> Can you try an older loader such as from 8.3 release before all the recent 
> changes to rototill the disk partition code?

It will unable to boot fresh ZFS installation.

> Also, the BIOS "knows" which devices are floppies (0x00 - 0x7f) vs hard drives 
> (0x80 - 0xff) and we should probably just not prove for ZFS on floppies.

Yes, you can break into loader prompt and run lsdev command, hard disks
names will be start from letter 'C'.

-- 
-- 
WBR, Andrey V. Elsukov