IBM Midrange System DS4000 Series Hardware Manual page 218

To attach the arrays or logical drives to the physical disks, right-click one of them and select
View associated physical components. The window that opens shows a blue dot under
each physical disk where the array or logical drive selected belongs, as shown in Figure 4-64.
Figure 4-64 Logical/Physical relationship
The current path of the logical drive is represented by the blue dot at the right side of the
controller. In this case, the logical drive named LogDrive1 is using controller A.
You can also use the Physical view of the Subsystem window and click one disk at a time to
display that disk's related array, as shown in Figure 4-65.
Figure 4-65 Physical/Logical relationship
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IBM Midrange System Storage Hardware Guide
Note the dots showing
physical drives and
current controller path.