The first column of the breakdown reports is DATA SET CATEGORY. The rows are TEMPORARY, ACTIVE, ACTV GDG, BACKUP, LARGE, HSM SFF, HSM GEN, and MGMTCLAS. These categories are related to the tape mount management data categories. See Categories of Tape Mount Management Data Sets and Data Set Usage Types for descriptions of these categories.

The tape mount management category of Active is divided into ACTIVE and ACTV GDG for the Estimate Report.

The tape mount management category of HSM is divided into HSM SFF (DFSMShsm single file format data sets) and HSM GEN (DFSMShsm generated data sets, such as VTOCDUMPs).

MGMTCLAS is the row that shows recall mounts.