Creating image copy data sets for future use and reuse

Use the REUSE parameter to inform DBRC that you want to be able to define image copy data sets and record them in the RECON data set for future use.

You define image copy data sets with the INIT.IC command. When processing the GENJCL.IC command, DBRC selects one of the image copy data sets for use by the image copy utility.

When the Database Image Copy utility uses an available image copy data set, DBRC updates its record in the RECON data set with the time stamp of the run of the Database Image Copy utility during which the image copy data set was used.

If you specify the NOREUSE parameter, you cannot predefine image copy data sets (This is the default). You need to supply the output data set name for the utility in either the skeletal JCL member used in processing the GENJCL.IC command or in the JCL that you produce yourself. When you specify NOREUSE, DBRC dynamically sets the unit type of the output image copy data set. DBRC sets it to the default unit type for the device as specified in the INIT.RECON and CHANGE.RECON commands. Specify NOREUSE when you want more than two DFSMSdss concurrent copies (you can have up to four).

If you do not specify REUSE, every time the image copy utility is run DBRC deletes the oldest image record that exceeds both the GENMAX and RECOVPD values. The image copy data set itself is not deleted-only its record in the RECON data set is deleted. You must either delete the data set or keep track of it yourself, because DBRC is no longer aware of its existence.

If you are using the image copy option of HSSP for a DEDB area, the area must be defined with the REUSE parameter and the data sets you predefine must be cataloged.