details on sata issues and mountroot prompt

[Brian]

Brian wrote:
> I have previously written about a mountroot prompt, here are some details.
> I have a system with an asus m3a78-emh hdmi board, a 74 gig raptor 
> drive, and a dual core amd am2 cpu.  I have had this result with both 
> the amd64 and i386 systems.  My steps were all conducted today as follows.
> 
> install 7.0 release
> run freebsd-update
> get src tree
> build world
> build and install kernel
> reboot and be greeted by a mountroot prompt.
> 
> It appears the drive numbering changed.  /etc/fstab has the drive 
> partitions with the number 5, the subsequent reboot got me a number 8.
> 
> This is a test system not doing anything, so I can kick it any which way 
> to test stuff.
> 
> Brian Whalen

I see that I could probably address it with something like this.

ed /etc/fstab
1,$s/ad5/ad8/
w
q

reboot

I'll leave it for a bit incase theres something to try testwise.

Brian