On Tue, 6 Feb 2001, John R. Jackson wrote:
> >which man page are you reading here? :)
>
> www.freebsd.org
I think he meant man page for which command. (You overlooked saying
in your last message.) I imagine you're looking at mt(1) which
contains:
comp Set compression mode. There are currently several possible
values for the compression mode:
off Turn compression off.
on Turn compression on.
none Same as off.
enable Same as on.
IDRC IBM Improved Data Recording Capability compression
(0x10).
DCLZ DCLZ compression algorithm (0x20).
In addition to the above recognized compression keywords, the
user can supply a numeric compression algorithm for the tape
drive to use. In most cases, simply turning the compression
`on' will have the desired effect of enabling the default com-
pression algorithm supported by the drive. If this is not the
case (see the status display to see which compression algo-
rithm is currently in use), the user can manually specify one
of the supported compression keywords (above), or supply a nu-
meric compression value.
Sorry, I haven't messed with this myself. I'm currently staring at
the Linux docs trying to figure out if I have to use ioctl in order
to turn h/w compression on and off there.
-Mitch
