In general, schedules with overwrite on and off can be used in staggered form to create new data sets and append to these sets. For more details, see the Archiving Overview. For example, the following schedule would result in a new data set each week:
• Weekly, Monday, Last Backups, Overwrite true: copies weekend master backups to start of tape(s).
• Weekly, other days, Last Backups, Overwrite false: appends weekday differentials to tape(s).
In this scenario, the tape(s) should be switched between completion of the Sunday job and the start of the Monday job. The retention period should be set to protect data throughout the rotation period. If four rotating sets of tapes are used, a 21-day retention setting would protect the media from the end of the Sunday job through the Monday job three weeks later, when that media is reused.