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6.8.4.3 Parameter

devaddr

This is the device address.

devtype

This is the device type. Valid device types are 3410, 3420, 3422, 3430, 3480, 3490,
8809 and 9347.

hetfile

The filename (and path) of the HET file or “*”. An asterisk defines an empty tape
station. The tape must be manually loaded on request.

If the filename starts with the “@” character (at sign), the file then describes a list of
tape emulation files to be loaded in succession. The syntax of each line in this file is
identical to the information that can be coded directly after the device type in the
overall configuration file. Any emulation file name parameter specified in this file
may be substituted by the character “*”, in which case it specifies a set of options to
be applied to all additional emulation files specified in the list.

This function emulates an Automatic Cartridge Feeder (ACF). The ACF is a feature
on cartridge type tape drives (3480, 3490, etc.) that automatically loads a new tape
when a tape is removed from the drive. There is no real control over this device by
the host as it just keeps on feeding tapes one after the other. Although the ACF
feature is unique to cartridge type systems, the emulation accepts the use of the
same technique for emulated 1/2 inch tapes reel drives as well.

Parameters are appended in succession. In all cases, if the same parameter is
coded more than once, the last instance takes precedence. Therefore it is possible
to specify a set of parameters in the base configuration file, another on an “*” line
and another for each individual line in the list of files. Parameters are then appen-
ded in that order. A SCSI tape device should not be given in a file list!

AWSTAPE

The AWSTAPE argument causes HET files to be written in AWSTAPE format. This
disables the additional feature provided by the HET format.

IDRC=

COMPRESS and IDRC control whether compression should be used when writing
to HET files. The value of n can be “1” to turn compression on (the default), or can
be “0” to turn compression off. IDRC is currently a synonym for COMPRESS but
may be used in the future to control another emulated tape drive feature. Therefore
COMPRESS is the preferred method to turn compression on or off.

COMPRESS=

This is the same as IDRC=.

METHOD=

The METHOD argument allows you to specify which compression method to use. A