mirror

last i did software mirroring, dinosaurs walked the earth.  back
then, ccd was the preferred means.  well, a friend has this box,
and i am a stuckee.  it has two identical drives, and i want to
just mirror the whole shebang.

    Filesystem  1K-blocks    Used     Avail Capacity  Mounted on
    /dev/ad0s1a   1012974   57758    874180     6%    /
    /dev/ad0s1d   1012974    1882    930056     0%    /var
    /dev/ad0s1e   1012974      20    931918     0%    /var/spool
    /dev/ad0s1f 112212598 1766794 101468798     2%    /usr

is ccd still the way to go, or is there a new incantation?
thanks!

randy