Partitioning with gpart or old style slices?

[Robert Simmons]

On Sunday, June 05, 2011 12:40:22 AM Matthias Apitz wrote:
> Since some time I'm as well using gpart(8) to setup new systems with the
> following sequence:
> 
> # gpart create -s mbr ad4                 # Init the disk with an MBR
> # gpart add -t freebsd ad4                # Create a BSD container
> # gpart create -s bsd ad4s1               # Init with a BSD scheme
> # gpart add -t freebsd-ufs  -s 1G ad4s1   # 1GB for /
> # gpart add -t freebsd-swap -s 2G ad4s1   # 2GB for swap
> # gpart add -t freebsd-ufs  -s 2G ad4s1   # 2GB for /var
> # gpart add -t freebsd-ufs  -s 1G ad4s1   # 1GB for /tmp
> # gpart add -t freebsd-ufs ad4s1          # all rest for /usr
> # gpart set -a active -i 1 ad4
> 
> But the result is not ready for boot after install the kernel and
> system; I allways have to go again with the sysinstall(8) tool to set
> the 'A' flag; don't know what I'm missing (and the man page is not very
> instructive on this); thanks

You need to install the bootcode:

This will install the interactive one:
gpart bootcode -b /mnt2/boot/boot0 ad4

this will install the non-interactive one:
gpart bootcode -b /mnt2/boot/mbr ad4