Verifying save set contents Sometimes BACKUP Manager cannot copy one of the specified files to the save set because of a file management conflict (for example, another user has a file open). In such a case, the save set may not contain all the files you specified in the Save operation. To verify that what was written to the save set is the same as what you specified, turn on the "Verify BACKUP Operation" option in the Options menu of the Save or Restore screen before starting the backup operation. If you turn on the "Verify BACKUP Operation" option, BACKUP displays an error message if it finds a discrepancy between the contents of the input and output specifications. Save sets written to a tape device are verified automatically. Save sets written to a disk device are not verified automatically. For information about running BACKUP Manager during hours when the fewest number of files are likely to be open, see "Running BACKUP Manager when you are not around" in the "Concepts ..." help topic. See also the "Command Line ..." help topic.