Quoting Peter Hollaubek <[EMAIL PROTECTED]>:
> As of /usr/src/UPDATING:
>         To update from 4.0-RELEASE or later to the most current
>         4.x-STABLE
>         ----------
>         make buildworld
>         make buildkernel KERNCONF=YOUR_KERNEL_HERE
>         make installkernel KERNCONF=YOUR_KERNEL_HERE
>         reboot  (in single user) [1]
>         make installworld
>         mergemaster             [2]
>         reboot
> In single user mode only the root fs is mounted by default. So for making
> installworld 
> you have to mount all the slices affected by such a process (usually all
> other slices like 
> /usr, /var), and also, only the system itself boots up, nothing else is
> started 
> preventing any problem caused by installing something new under a running old
> task 
> in memory. If the new kernel fails you can return to the old one without
> risking 
> incompatibility with the old kernel and the new world. Everything in this
> order has a 
> reason :). 

Thanks to all, and particularly Peter for this complete explanation.

I had taken makeworld.html from the handbook and used links to save as formatted
text prior to printing out the contents.
Not being familiar with single user mode, I didn't realise that only / was
mounted in that mode (so why does the handbook put "fsck -p" as the FIRST
command, before "mount -a" ? <sigh>).
Not being familiar with sh (and not thinking too well either) I assumed that
"make buildkernel # make installkernel" was two linked commands on the one line,
wheras it should have been read as:
# make buildkernel
# make installkernel
with the # simply indicating root prompt (Thanks, Sue).

All-in-all there was actually nothing wrong (except my ignorance <g>)


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