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 pos-
sible 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
appended in that order. A SCSI tape device should not be given in a file list.

The remaining parameters are described in section

6.8.3.4 Examples

Example 1:

Define a 3490 tape device on device address 0580. The tape device is an AWSFILE virtual file named
"R0673A.AWS" located in path "/S390/TAPES/".

0580 3490 /S390/TAPES/R0673A.AWS

Example 2:

Define a 3490 tape device on device address 0580. The tape device is an AWSFILE virtual file named
"R0674A.AWS" located in path "/S390/TAPES/". Mount the tape readonly and disable the support for
guest-initiated automatic tape volume mounting for this device.

0580 3490 /S390/TAPES/R0674A.AWS READONLY=1 NOAUTOMOUNT

6.8.4 HET virtual files

6.8.4.1 HET virtual files

HET device statements are used to define HET virtual files to the Hercules configuration. These contain a
complete tape in one file and have the same structure as the AWSTAPE format with the added ability to
have compressed data. The first argument specifies the location of the HET file. The filename must end
with “.HET” to be recognized by Hercules as a HET file (e.g. “023178.HET”). There are several additional
arguments that control various HET settings.

6.8.4.2 Syntax

Descriptive

hetfile arguments]

where arguments can be

1

n 4

nnnnn

n

n

n

n

RW ]

Diagram

Êʬ¬¬ ¬¬¬ ¬¬¬§¬¬¬ hetfile ¬¬¬§¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬Ê