230 Implementing the IBM Storwize V7000 with IBM Spectrum Virtualize V8.2.1
To start virtualizing the iSCSI backend controller, you need to follow the documentation in IBM 
Knowledge Center to perform the configuration steps that are specific to your backend 
storage controller.
Detailed instructions on configuring Storwize V7000 to virtualize back-end storage controller 
with iSCSI are available in the following publication: iSCSI Implementation and Best Practices 
on IBM Storwize Storage Systems, SG24-8327.
6.3.2  Actions on external storage controllers
You can perform a number of actions on external storage controllers. Some actions are 
available for external iSCSI controllers only.
To select any action, right-click the controller, as shown in Figure 6-50. Alternatively, select 
the controller and click Actions. 
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.
For CLI commands and detailed instructions, see iSCSI Implementation and Best Practices 
on IBM Storwize Storage Systems, SG24-8327.