bash-3.1$ # this the OpenBSD laptop
bash-3.1$ df -h
Filesystem     Size    Used   Avail Capacity  Mounted on
/dev/wd0a     98.4M   34.0M   59.5M    36%    /
/dev/wd0g      1.0G    135M    844M    14%    /home
/dev/wd0e      343M   16.0K    326M     0%    /tmp
/dev/wd0d      3.8G    2.3G    1.4G    62%    /usr
/dev/wd0f      343M   14.2M    312M     4%    /var
/dev/sd0g     58.0G   25.4G   29.7G    46%    /mnt
bash-3.1$ I am going to backup to /dev/sd0g

bash-3.1$ file /mnt/bsd/home_feb06.dump 
/mnt/bsd/home_feb06.dump: new-fs dump file (little endian), This dump Tue Feb  6 10:25:56 2007, Previous dump Wed Dec 31 17:00:00 1969, Volume 4, Level zero, type: tape header, Label none, Filesystem /home, Device /dev/wd0g, Host openbsd.colobsd.us, Flags 3