gpart bootcode manually

[Warren Block]

On Mon, 10 Jan 2011, David Demelier wrote:

> Because I wanted to crypt a /home partition, I tried to make my partition and 
> slice using gpart in the fixit environment.
>
> There is the partition I've made :
>
> Fixit # gpart show ad0
> =>       63  625142385  ad0  MBR  (298G)
>         63  625142385    1  freebsd  [active]  (298G)
>
> Fixit # gpart show ad0s1
> =>        0  625142385  ad0s1  BSD  (298G)
>          0         63         - free -  (32K)
>         63    1048576      1  freebsd-ufs  (512M)
>    1048639    4194304      2  freebsd-swap  (2.0G)
>    5242943     524288      4  freebsd-ufs  (256M)
>    5767231     524288      5  freebsd-ufs  (256M)
>    6291519   20971520      6  freebsd-ufs  (10G)
>   27263039  597879346      7  freebsd-ufs  (285G)
>
> To install the boot1, I tried this :
>
> gpart bootcode -b /mnt2/boot/boot1 ad2s1
> gpart bootcode -b /mnt2/boot/boot1 ad2
>
> But nothing happens, there is not the / spinning, just a blinking underscore. 
> What did I wrong ?

If you didn't do 'sysctl kern.geom.debugflags=16', it should give a 
warning.  But maybe not in that case.

I'd think it's a mistake to install bootcode to a slice, but gpart says 
you can do it provided you use -p and -i.