> I don't see a big need to separate / and /usr.
>
> FWIW this system has:
> Filesystem  1K-blocks     Used     Avail Capacity  Mounted on
> /dev/wd0h     2087630  1567403    415845    79%    /
> mfs:209         99087       23     94109     0%    /tmp
> kernfs              1        1         0   100%    /kern
> procfs              4        4         0   100%    /proc
> /dev/wd0a      528051    27675    473973     5%    /oldroot
> /dev/wd0e     2465712  2183228    159198    93%    /oldroot/usr
> /dev/wd0g     1610231   482826   1046893    31%    /home
> /dev/wd0i     5964268  2805701   2860353    49%    /bsd
> /dev/wd0j     1985263   170146   1715853     9%    /sparc_root
> /dev/wd0k     1751824  1449749    214483    87%    /shark_root
>

anyway that looks better for me :)

home host:

Filesystem  1K-blocks     Used     Avail Capacity  Mounted on
/dev/wd0a    38977324 15668692  21359764    42%    /


production host:

root@serwer# df
Filesystem  1K-blocks     Used    Avail Capacity  Mounted on
/dev/wd1a    76185864 27207536 45169034    37%    /


other production host:
Filesystem  1K-blocks     Used    Avail Capacity  Mounted on
/dev/wd0a    76375895 63741463  8815637    87%    /
/dev/wd1a    77517230 74714693  2802537    96%    /home/NetBSD



no partitions, no problems!