The MERGE command shown with the sample JCL below selects as input to the merge process those archive volumes that are less that 70 percent used. (Archive volumes refer to both archive tape volumes and disk archive data sets. Less than 70 percent used means that the unexpired data sets occupy less than 70 percent of either (a) the length of the tape, or (b) the disk space allocated to the disk archive data set.) The unexpired data sets from these selected volumes will be moved to one of three new output units, based on expiration date. Those moved to either of the first two expiration groups will have a duplicate copy created concurrently. Those moved to the third (highest) expiration group will not have a duplicate created. The following illustration is a sample JCL for the MERGE Command:
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