To have CA VM:Backup pack data while backing it up, select Yes in the Compression field. When you select Yes, CA VM:Backup uses a general-purpose packing algorithm. This algorithm eliminates repeating characters (for example, blanks) in a data file by replacing them with a 3-byte field. By default, CA VM:Backup does not pack data while backing it up.
If hardware compression is available to you through IDRC-capable tape drives, you can still have CA VM:Backup pack the data. However, the job run time and the number of tapes that are needed for the job can increase. Experiment with a variety of jobs to see which settings give you the right balance between job run times and number of tapes produced.
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