> graul@cgl.ucsf.edu has randomly hit several keys, resulting in
> > I get the following error message during boot:
> > /dev/sd0a: file system not clean; please run fsck(8)
> > even after I run fsck single user.
> 
>  mkfs makes old-style file systems that don't support the clean-bit.
> This can be fixed with fsck -c 2 or something like that, but then

Do NOT do "fsck -c 2" on your root partition unless you are absolutely
positive that you don't need to access the partition from the Install
Utility.  Merely replacing old fsck with a newer version suffices.

> Installer won't work on that partition. The warning can be safely
> ignored, as far as I know.

Yes, but it implies that the kernel and other binaries are out of
synch.

kenn