Example using tape drives
Tape drives are usually owned by only one machine, but they can be used by a started task workstation and a computer workstation on the same machine, so you can, for example, allocate a tape pool to workstations CPU1 and STC1.
Operations that use tapes must allocate them exclusively. Do not let your operations keep this resource on error, because you normally want to release a tape drive for other work while you prepare a rerun of a failed job.
Specify the resource like this:
- Name
- TAPES
- Usage
- Give all operations exclusive allocation.
- Quantity
- 10 (for example). You need not make all the drives available for automatic allocation.
- Used for
- B (both planning and control).
- On-error action
- Free all.
- Workstations
- Connect to all workstations that can use the tapes.
- Intervals
- Reduce the number available when online systems might need a tape and make the resource unavailable when the workstation is unattended.