Advanced Topics › Control and Checkpoint File Considerations › How You Migrate to a New Control File › Migrate to a Coupling Facility Structure Control File

Migrate to a Coupling Facility Structure Control File

You can migrate to a coupling facility structure control file in the same way that you migrate to a DASD control file. To view the list of available control file IDs, issue the DISPLAY FILES=CF command. Migration to a coupling facility structure control file occurs in one of these ways:

• From a virtual control file to a coupling facility structure control file in the CTCDASD environment
• From one coupling facility structure control file to another coupling facility structure control file in the DASDONLY or CTCDASD environment
• From a DASD control file to a coupling facility structure control file in the DASDONLY or CTCDASD environment

To migrate from a virtual control file to a backup coupling facility structure control file

1. Issue the following command to view the list of available control file IDs:

   DISPLAY FILES
   

2. Issue the following command

   MIGRATE CONTROLFILE=nn
   

   nn

   Specifies the control file ID of the backup coupling facility structure control file

   For example, to switch from the current virtual control file and begin using coupling facility structure control file 02, issue this MIGRATE command:

   MIGRATE CONTROLFILE=02
   

To migrate from the current DASD control file or current coupling facility structure control file to a new coupling facility structure control file

1. Issue the following command to view the list of available control file IDs:

   DISPLAY FILES
   

2. Issue the following command

   MIGRATE CONTROLFILE=nn
   

   nn

   Specifies the control file ID of the new coupling facility structure control file

You do not have to migrate to the first or next control file identified in the startup procedure or listed in the DISPLAY FILES=CF command response. You can migrate to any usable control file, even if the ID of the control file is lower than the ID for the current control file.

To migrate to the next available control file

Issue the following command:

MIGRATE CF

Note: When you migrate from a virtual control file to a coupling facility structure control file, the virtual control file is automatically deactivated.