Click  Map Volumes  and wait for the mappings to be created. 14.Select the storage pool that you want to migrate the imported volumes into. Ensure that  the selected storage pool has enough space to accommodate the migrated volumes  before you continue. This is an optional step. You can decide not to migrate to Storage  pool and to leave the imported MDisk as an image-mode volume. This technique is not  recommended because no volume mirroring are created. Therefore, no protection is  available for the imported MDisk, and no data transfer occurs from the system to be  migrated and the Storwize V7000. Click  Next , as shown in Figure 9-13. Figure 9-13 Select the pool to migrate the MDisk to The migration starts. This task continues running in the background and uses the volume  mirroring function to place a generic copy of the image-mode volumes in the selected  storage pool.  Note:  With volume mirroring, the system creates two copies (Copy0 and Copy1) of a  volume. Typically, Copy0 is located in the migration pool, and Copy1 is created in the  target pool of the migration. When the host generates a write I/O on the volume, data is  written at the same time on both copies. Read I/Os are performed on the preferred  copy.  In the background, a mirror synchronization of the two copies is performed and runs  until the two copies are synchronized. The speed of this background synchronization  can be changed in the volume properties.  398  Implementing the IBM Storwize V7000 with IBM Spectrum Virtualize V8.2.1