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Date: Thu, 29 Jan 2009 23:52:22 -0600 (CST)
From: Wes Morgan <morganw@chemikals.org>
To: Mike Barnard <mike.barnardq@gmail.com>
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Cc: freebsd-stable@freebsd.org
Subject: Re: Unable to boot after upgrade to 7.0 or 7.1 STABLE
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On Thu, 29 Jan 2009, Mike Barnard wrote:

> Hi All,
>
> I have run into a problem that seem rather puzzling. I have upgraded an
> installation of FreeBSD from 7.0-RELEASE to 7.0-STABLE and 7.1-STABLE, but i
> fail to boot with either one of the STABLE upgrades. I end up at this point:
>
>
> Trying to mount root from ufs:/dev/ad0s1a
> Manual root filesystem specification:
> <fstype>:<device> Mount <device> using filesystem <fstype>
> eg. ufs:da0s1a
> ? List valid disk boot devices
> <empty line> Abort manual input
>
> When i type ?, i get nothing. When i try to load all possible drives, from
> ad0s1a to ad9s1a, i get nothing. When i boot kernel.old, i see this:
>
> atapci0: <Intel ICH7 SATA300 controller> port
> 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xfa00-0xfa0f mem 0xfdffe000-0xfdffe3ff
> at device 31.2 on pci0
> ...
> ad0: 152627MB <WDC WD1600AAJS-60PSA0 21.12M21> at ata0-master SATA150
>
> It seems that FreeBSD recognises this drive as a SATA300 but later on refers
> to it as SATA150. Could this be the problem.

Have you checked the jumper settings on the drive? There may be a jumper 
forcing SATA150 mode on the drive. I'd reset everything to factory 
defaults if possible.

You might be able to use the ata driver from 7.0-R in -stable to boot your 
system. If that works, try searching for the commit that breaks your 
controller.