FreeBSD 6.1 hangs at mountroot> during bootup

Derek Ragona derek at
Thu Sep 21 00:33:29 PDT 2006

I have seen this in a few situations:
1.) the BIOS is set to not allow boot area writes
2.) The root partition is outside the first 1024 cylinders.  This was on 
older hardware that didn't do good geometry translation on big drives.
3.) moved the root partition to another slice


At 06:47 PM 9/20/2006, Mike Peirson wrote:
>Hi all,
>First off, I'm new to FreeBSD and this mailinglist so I hope I am in the 
>right place. Anyways, right now I am having some problems with FreeBSD 
>booting up. I have tried to install 3 times now and keep getting the same 
>error. When I try to boot into FreeBSD, this eventually comes up:
>         Manual root filesystem specification:
>                   <fstype>:<device> Mount <device> using filesystem <fstype>
>                                        eg. ufs:da0s1a
>                   ?                 List valid disk boot devices
>                   <empty line>      abort manual input
>                 Mountroot>
>This seems to be a prompt where I need to specify the location of the root 
>partition, but the problem here is that it hangs or freezes and I cannot 
>input any text. At first I thought it may be a result of FreeBSD not 
>properly recognizing my HDD's geometry but I manually fixed that and it 
>still is giving me this same issue. If anyone has had a similar problem or 
>knows how to fix this I would greatly appreciate any help. I looked 
>through the Handbook and googled this but I haven't found a solution yet.
>Michael Peirson
>freebsd-questions at mailing list
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