dump/restore, how to reduce slice size

[Коньков Евгений]

Hi, Freebsd-questions.

# df -h
Filesystem     Size    Used   Avail Capacity  Mounted on
/dev/ad4s1a      2G    206M    1.6G    11%    /
devfs          1.0k    1.0k      0B   100%    /dev
/dev/ad4s1e    3.9G     13M    3.6G     0%    /tmp
/dev/ad4s1f     40G     25G     12G    67%    /usr
/dev/ad4s1d     31G    3.6G     24G    13%    /var
procfs         4.0k    4.0k      0B   100%    /proc
/dev/ad2s1f     39G     25G     10G    71%    /mnt
devfs          1.0k    1.0k      0B   100%    /var/named/dev


as you can see /dev/ad4s1f is 40G and /dev/ad2s1f is 39G
but on ad4s1f only 25G used.

How can I dump /dev/ad4s1f and restore it on /dev/ad2s1f?

These commands:
#mount /dev/ad2s1f /mnt
#cd /mnt
#dump -0Lf - /usr | restore -rf -
does not help, because of ad2s1f does not have space to restore
'end of ' /dev/ad4s1f.

May help any?

-- 
Konkov                          mailto:kes-kes at yandex.ru