Properties 4.4 Working with external storage controllers For more information about external storage, see Chapter 11, “External storage virtualization”  on page 607. LUNs that are presented by external storage systems to IBM Storwize V5000 Gen2 are  discovered as unmanaged MDisks. Initially, the MDisk is not a member of any storage pools,  which means that it is not used by the IBM Storwize V5000 Gen2 storage system.  After the internal storage configuration is complete, you can find the MDisks that were created  by using the internal drives in the MDisks by Pools window. When you use this window, you  can manage all MDisks that are made up of internal and external storage. The Properties action for an MDisk shows the information that you need to identify it. In the  MDisks by Pools window, select the MDisk and click  Properties  from the  Actions  menu.  Alternatively, right-click the MDisk and select  Properties . For more information about the  selected MDisk, click  Copy 0 , as shown in Figure 4-73. Figure 4-73 MDisk properties Chapter 4. Storage pools  215