ABCs of z/OS System Programming Volume 3 - IBM Redbooks

DELET6 JOB ...
//STEP1 EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=A
//SYSIN DD *
DELETE -
USER.CATALOG -
PURGE -
USERCATALOG
/*
Figure 6-23 Delete an empty user catalog
Important: The FORCE parameter deletes all data sets in the catalog. The DELETE command
deletes both the catalog and the catalog's user catalog connector entry in the master
catalog.
Delete a migrated data set
A migrated data set is a data set moved by DFSMShsm to a cheaper storage device to make
room in your primary DASD farm. Catalog management recognizes that a data set is
migrated by the MIGRAT volser in its catalog entry. A migrated data set can be DELETE
SCRATCH (TSO DELETE issues the DFSMShsm HDELETE command) or NOSCRATCH.
Where:
SCRATCH This means that the non-VSAM data set being deleted from the catalog is to
be removed from the VTOC of the volume on which it resides. When
SCRATCH is specified for a cluster, alternate index, page space, or data
space, the VTOC entries for the volumes involved are updated to reflect the
deletion of the object.
NOSCRATCH This means that the non-VSAM data set being deleted from the catalog is to
remain in the VTOC of the volume on which it resides, or that it has already
been scratched from the VTOC. When NOSCRATCH is specified for a
cluster, page space, alternate index, or data space, the VTOC entries for the
volumes involved are not updated.
To execute the DELETE command against a migrated data set, you must have RACF group
ARCCATGP defined. In general to allow certain authorized users to perform these operations
on migrated data sets without recalling them, perform the following steps:
1. Define a RACF catalog maintenance group named ARCCATGP.
ADDGROUP (ARCCATGP)
2. Connect the desired users to that group.
Only when such a user is logged on under group ARCCATGP does DFSMShsm bypass the
automatic recall for UNCATALOG, RECATALOG, and DELETE/NOSCRATCH requests for
migrated data sets. For example, the following LOGON command demonstrates starting a
TSO session under ARCCATGP. For further information about ARCCATGP group, see z/OS
DFSMShsm Implementation and Customization Guide, SC35-0418.
LOGON userid | password GROUP(ARCCATGP)
To delete a migrated data set, but the data set is not recorded in the HSM control data sets,
execute a DELETE NOSCRATCH command for the data set to clean up the ICF catalog.
350 ABCs of z/OS System Programming Volume 3