Sequential Migration to Tape › Migration Concerns

Migration Concerns

A duplicate copy tape for backup purposes can be created concurrently with the primary tape. The following installation requirements must be met for this capability to be used:

• Sysparm MIGPSCOP must be specified with a value of Y.
• The //MIGRATEC dd statement must be in the JCL.
• The FILES must have the MIGRECAT subfile properly initialized
• Consult your local CA Disk installation and support personnel to determine if this option is being used, or to request a change.

The MIGRECAT file is used to contain a record for each data set that is migrated to a primary and copy tape. When a primary tape volume cannot be used, the RECATALOG command is used to read these records and recatalog all of the data sets on the primary volume to the backup volume.

It must also be noted that CA Disk does not provide any formal automated means for managing the entries in the MIGRECAT file. CA Disk has no way of knowing how long to keep them. For this reason, the file will need to be purged occasionally to keep it from becoming excessively large. To accomplish a purge of this (or any subfile), merely unload the FDS, excluding MIGRECAT (filename) from the list of files, and then reload the unloaded records. See FDS Utilities in the Systems Guide for more information on UNLOAD and RELOAD.