Subject: disabling tape drive compression
To: None <firstname.lastname@example.org>
From: Simon J. Gerraty <email@example.com>
Date: 10/27/1998 08:59:51
The consensus from my amanda question was to disable compression on
the tape drive and let amanda do it....
So I'd like to setup a tape device that will always turn off
The man page for st(4) says:
There are several different `operation' modes. These are controlled by
bits 2 and 3 of the minor number and are designed to allow users to easi-
ly read and write different formats of tape on devices that allow multi-
ple formats. The parameters for each mode can be set individually by
hand with the mt(1) command. When a device corresponding to a particular
does this mean that I can create say:
crw-rw---- 1 root operator 14, 5 Oct 26 10:44 /dev/nrnst0
and use mt -f /dev/nrnst0 compress 0
to associate no-compression with that device permanently? (until
next reboot). The fact that mt fails unless there is a tape in the
drive suggests perhaps not.
Can this be encoded in the quirks table?
Otherwise I guess I can hack amanda's pre-dump checks to do the deed.