DATA SET LEVEL MIRRORING TO ACCOMPLISH A VOLUME MERGE/MIGRATE IN A DIGITAL DATA STORAGE SYSTEM

摘要

Users of Mainframe computers running under IBM's MVS operating systems have a need to merge migrate data from multiple smaller DASD devices (disk volumes) (300, 302) to larger DASD devices (304), and/or to migrate data in order to combine data set extents. A method (100) is disclosed for migrating data where a volume merge is involved, and/or when combining of extents is desired, that minimizes the down time (124) of applications using the involved data while satisfying MVS rules for volume and catalog meta-data files as well as data extent limitations. The method may be implemented such that source and target volumes need not be in like manufacturer DASD devices.