Define vital record specifications to set policies to retain all volumes that contain any of the closed-cycle GDG generations that match the GDG base name, but only move those volumes actually used in each generation. Specify CYCLES COUNT(99999) to keep all generations and do not use the retain while cataloged option WHILECATALOG.

For example, you have a closed-cycle GDG limited to three generations, want to keep the most recent generation in a system-managed library, ATL1, the next most recent in storage location REMOTE, and retain all volumes for reuse as the data sets fluctuate in size. Figure 1 shows sample vital record specifications to manage the closed-cycle GDG.

RMM ADDVRS DSNAME('SAMPLE.GDG') GDG CYCLES COUNT LOCATION(ATL1) -
    STORENUMBER(1) NEXTVRS(N1)
RMM ADDVRS NAME(N1) STORENUMBER(1) LOCATION(REMOTE)