NAME

arcdat − Archive Python DAT data compression enable/disable utility

SYNOPSIS

arcdat [+−] options tapedev

DESCRIPTION

arcdat sends commands to the Archive Digital Audio Tape (DAT) drive to enable and disable data compression features that are only available on this drive.  Note that tapedev must refer to a raw (not block) tape device. 

The default condition of the drive is to have write compression and read decompression on. 

The available options are:

−h Display help information

+c Enable data compression on write

−c Disable data compression on write

+d Enable data decompression on read

−d Disable data decompression on read

+r Enable report error on decompression

−r Disable report error on decompression

−s Get status of compression

EXAMPLES

To turn on write data compression, enter the command:

arcdat +c /dev/rmt/m187_40t

To turn on read data decompression, enter the command:

arcdat +d /dev/rmt/m187_40t

To turn off read data decompression, enter the command:

arcdat −d /dev/rmt/m187_40t

FILES

/dev/rmt/∗     raw magnetic tape interface

WARNINGS

The arcdat utility must only be used on Archive DAT drives.  Usage on any other device can result in unpredictable results. 

  —  Essential Utilities