Figure 4-61 Modifying external MDisk encryption Import This action is available only for unmanaged MDisks. Importing an unmanaged MDisk allows  the user to preserve the data on the MDisk by migrating the data to a new volume or keeping  the data on the external system. Selecting  Import  allows you to choose one of the following migration methods: If this method is selected, the image-mode volume is created in a temporary migration  pool and presented through the IBM Storwize V5000 Gen2. Choose the extent size of the  temporary pool and click  Import , as shown in Figure 4-62 on page 209. GLYPH<SM590000> The Import to temporary pool as image-mode volume option does not migrate data from  the source MDisk. It creates an  image-mode volume  that has a direct block-for-block  translation of the MDisk. The data is preserved on the external storage system, but it is  also accessible from the IBM Storwize V5000 Gen2 system. 208  Implementing the IBM Storwize V5000 Gen2 with IBM Spectrum Virtualize V8.2.1