Shared Tape Allocation Manager (STAM) Facility › Defining the STAM Parameter File

Defining the STAM Parameter File

The STAM parameter file contains a description of all devices and systems participating in tape drive sharing. The same parameter file must be used by all systems. Choose a descriptive name, for example STAM PARM, when creating the file. Typically this file resides on the 191 A-disk. Use the STAMPARM configuration record to identify the name of the STAM parameter file to CA VM:Tape.

Note: Each time you modify the STAM parameter file, run the VMTSTF utility to ensure that the structure of the STAM control disk area is updated with the change. The CA VM:Tape STAM facility reads the STAM parameter file and expects the control disk to match those specifications. Any variance could result in unpredictable behavior. For information about using the utility, see VMTSTF Utility.

The STAM parameter file can contain three types of entries; SID, DEV, and OPT, as shown in the following table.

STAM Parameter File Entry Types

Except for SID entries, which do not use a name, each parameter file entry consists of a name starting in position 1; the entry type starting in position 10, followed by one or more blanks; and then one or more parameters. The entry can continue through position 71; position 72 should be blank. Continuations are permitted only for a DEV entry. For more information about DEV entries, see DEV Entries. Any entry with an asterisk in the first position is treated as a comment.