5190/5194 Modular Tape Subsystem Manual

Operating the Cartridge Tape Drive and ACL
5190/5194 Modular Tape Subsystem Manual—426878-002
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Programming and Configuration Considerations
To change the compression mode, first stop the drive, then use the SCF ALTER
command to assign a value to the COMPRESSION option; for example:
->ALTER TAPE $TAPE0, COMPRESSION ON
It is not necessary to specify a compression modifier in the PERIPHERALS paragraph
if you set a systemwide default setting using the MEDIACOM ALTER MEDIADEFS
command. The MEDIACOM default setting overrides this modifier.
For more information, see the SCF Reference Manual for the Storage Subsystem.
Programming and Configuration
Considerations
This subsection contains information for programmers and operations personnel.
Guardian Procedure Calls
The modular tape subsystem supports the following Guardian procedure calls:
For more information about using Guardian procedure calls for controlling your tape
drives, see the Guardian Procedure Calls Reference Manual and the Guardian
Programmer’s Guide.
AWAITIO[X] FILE_GETINFOBYNAME
CANCELREQ FILEINFO
CLOSE FILEINQUIRE
CONTROL OPEN
DEVICE_GETINFOBYLDEV (D-series only) READ[X]
DEVICE_GETINFOBYNAME (D-series only) SETMODE
CONFIG_GETINFO_BYLDEV2_ (G-series only) SETMODENOWAIT
CONFIG_GETINFO_BYNAME2_ (G-series only) WRITE[X]
DEVICEINFO