In the Hierarchical Storage Manager,the process of copying data sets which have been opened for reasons other than read-only access since the last backup version was created,and meet the backup frequency criteria.

• 在分级存储管理程序中,复制若干数据集的处理方法,这些数据集是指从上一个后备版本建立以来,不是由于只读存取而打开过的,并且满足备份频度要求的数据集。