IBM Midrange System DS4000 Series Hardware Manual page 239

Select the disk drive, right-click it, and select Properties. Use the LUN number to isolate each
logical drive, as shown in Figure 4-89.
LUN Identification
Figure 4-89 Matching LUNs between a Windows host and SM
Finally, use the Windows Disk Management to start using your new mapped DS5000 storage
subsystem disks, as shown in Figure 4-90. You can get the information shown in Figure 4-89
by clicking each of the drives and selecting Properties.
Figure 4-90 Windows Disk Management
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Chapter 4. IBM System Storage DS planning and configuration