text: Figure 6-50 Actions on external storage 
  
  **Discover storage**
  When you create or remove LUs on an external storage system, the change might not be 
  detected automatically. In this case, select**Discover Storage**for the system to rescan the 
  Fibre Channel or iSCSI network. In general, the system automatically detects disks when 
  they appear on the network. However, some FC controllers do not send the required SCSI 
  primitives that are necessary to automatically discover the new disks. 
  
  The rescan process discovers any new MDisks that were added to the system and 
  rebalances MDisk access across the available ports. It also detects any loss of availability of 
  the controller ports. 
  
  This action executes the CLI command**detectmdisk**. 
  
  **Rename**
  Select**Rename**to modify the name of an external controller to simplify administration tasks. 
  Naming rules are the same as for storage pools and can be found in 6.1.1, “Creating storage 
  pools” on page 193. 
  
  To rename storage controller with the CLI, use**chcontroller**. Use case is provided in 
  Example 6-24 on page 231. 
  
  **Remove iSCSI sessions**
  This action is available only for external controllers that are attached with iSCSI. Right-click 
  the session and select**Remove**to remove the iSCSI session that is established between the 
  source and target port. 