buildworld, buildkernel, installkernel, shutdow now, fsck -p -- NO WRITE ACCESS

Daniel Bye freebsd-questions at
Mon Aug 4 22:08:08 UTC 2008

On Mon, Aug 04, 2008 at 04:00:56PM -0400, freebsd_user at wrote:
> I do not code in any way.  With that being said, should you be able to 
> help please do so with the knowledge that I can not code.  I'm following 
> the freebsd handbook when the following occurs.
> -- separate fresh 'dangerously dedicated' installs of both 7.0 and 
> 6.3-RELEASE on the same machine, yield the following:
> In multi-user mode make buildworld, buildkernel and installkernel.
> Shutdown now

This will only drop you to single user mode with all filesystems still
mounted. It is not a good idea to run fsck on a mounted filesystem...

Instead, you need to run

# shutdown -r now

to REBOOT the machine with the newly installed kernel. At the loader
menu, press `4' to boot into single user mode (at this point, only /
will be mounted, so your `fsck -p' should work just fine).

Now procede with the next steps...

> -- fsck -p
> /dev/ad4s1a: NO WRITE ACCESS
> This happens each and everytime no matter if I install from iso -or- ftp 
> (passive). After numerous attempts the only way to get past this is 
> 'fsck -y'. Could the fbsd handbook section I'm following need updating 
> or is there another issue taking place here?

I think you're getting confused by the instructions (don't have a browser
to hand so can't check the handbook, so apologies if this isn't the case).
IIRC, the handbook suggests you drop to single user BEFORE you begin, in 
order to ensure nothing else is running while you run the build. In my
experience, this has not been necessary. Even still, after the installkernel
you MUST reboot the newly installed kernel before you continue.



Daniel Bye
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