Hardware-based Providers use the full copy method to create a complete, point-in-time shadow copy of the data set to another disk array (or another section of the same disk array). This shadow copy can then be used as the backup copy for restore operations, or it can be transported to another disk or tape device for longer-term retention or archival use. Because the shadow copy is an exact full copy of the original data set, the required disk space for the first shadow copy is double, and so on.
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