Overview

Global Phased mode is used when you are reasonably certain that Control-M/Tape is functioning like the other tape management system. As a safety feature, this mode enables both Control-M/Tape and the other tape management system to be fully operational simultaneously.

Previously (in Global Test mode) Control-M/Tape operated in the background (meaning, it had no effect on production). In Global Phased mode, only operations that are allowed by both Control-M/Tape and the other tape management system are performed. Operations not consistent with either Control-M/Tape or the other tape management system are not performed and relevant messages are sent to the console or job log.

Note: Media management features that do not affect compatibility of operations with the other tape management system should be tested in Global Phased mode. Changes that do affect compatibility (for example, Control-M/Tape duplicate volser support) should not be implemented while Control-M/Tape is operating in Global Phased mode.

Most of this chapter deals with preparation for the transfer of Control-M/Tape operations to Global Phased mode. The object of these preparations is to minimize discrepancies between the Control-M/Tape and the other tape management system. Features that do not affect compatibility (for example, alteration of MOUNT and KEEP messages) should be activated with the change to Global Phased mode. Advanced Control-M/Tape features (for example, Dynamic Data Set Stacking) should not be implemented until the transfer to Global Production mode.