For more information about SDDDSM, see  Multipath Subsystem Device Driver User’s Guide,  GC52-1309. The guide is available at this IBM Support web page. To check the installed driver version, complete the following steps: Windows 2012 R2 1. Select the  Windows Start  icon in the lower-left corner, as shown in Figure 5-4. 2. Expand the view by clicking the down arrow that is shown in Figure 5-5. Figure 5-4 Windows 2012 R2 start  Figure 5-5 Expand view to see all programs that are installed Chapter 5. Host configuration  223