How to identify old Archives compressed by CA Compress ?

Document ID : KB000013617
Last Modified Date : 14/02/2018
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Introduction:

The customer would like to remove the old module DMSOSFDT from CA Compress. This module was used to compress Archvol data sets.  

As per Systems Guide, the parameter SHRNKFDTdmsosfdt provides the name of the CA Compress FDT used to compress the CA Disk archive data sets.  

The CA Compress product to compress the CA Disk archives is only used with the CA Disk data compression technique number 1, that means with sysparms DCCOMPTC1 and DCDATACPy set. So all concerned Archives were created using sysparm DCCOMPTC set to 1, as this technique number was reserved for usage with CA Compress.

Question:

How to identify all old Archives compressed by CA Compress ?

Answer:

Unfortunately, the compression information is kept in the control record of the archived data set, not in the Dnindex or Archvols records. 

So it not possible to create a CA Disk report with all Archives that are compressed via this module from CA Compress.

 

The only way to find all the compressed data sets is to read all the Archive data sets.

In other words, the old module DMSOSFDT from CA Compress needs to be kept.