Backup/Archive › Non-VSAM Considerations › Model DSCB Processing

Model DSCB Processing

Data sets with zero extents and no secondary allocation amount are most commonly used as model DSCBs. They can be identified with the DSCL selection criteria MODELDSC.

Since model DSCBs are not opened and used like other data sets, their modify bit and last used date are never modified. Because they take up no space on the volume, by default CA Disk will not archive model DSCBs unless you specify sysparm ARCMODEL with a value of Y. Regardless of the setting of ARCMODEL, CA Disk backs up and restores model DSCBs.