Storage pools are classified as either primary storage pools or copy storage pools. By defining one or more copy storage pools for a primary storage pool, backup data can be written simultaneously to both types of pools.
Point
Copy storage pools can be used only with sequential access storage devices (for example, the tape storage class).
When backup is executed, backup data is written to the primary storage pool and simultaneously kept in the related copy storage pool.
In this manual, the primary storage pool is represented as a "storage pool".
Figure 3.2 Overview of primary storage pool and copy storage pool
