HP StorageWorks SAN Virtualization Services Platform administrator guide (5697-0204, January 2010)

Figure 15 Zoning between 2 quad-port controllers and two quads of each DPM
.
If greater control over the available paths to each LUN is required (for example, to improve load
balancing), use a combination of more restrictive zoning and LUN presentation to the DPM from the
back-end storage device.
DPM-VSM zoning
A DPM-VSM back-end zone is used to give the VSM access to the back-end initiator ports of the DPM
to manage the DPM LUN mapping information and facilitate data mover functions. A back-end path
between the DPM and the VSM consists of a single DPM back-end initiator port and a single port on
the VSM. In this type of zone, the VSM acts in the target role. The only rule for creating DPM-VSM
zones is that each DPM back-end initiator port is zoned to all VSM target ports on the given fabric.
Unlike the DPM-Host or DPM-Storage zoning, there is no limitation on the number of paths that exist
between the VSM and DPM. Each zone has a single DPM back-end initiator port and multiple VSM
target ports.
Figure 16 illustrates zoning between VSMs and the first quad of each DPM. This can be duplicated
for additional DPM quads by adding more zones. Paths between DPM initiator ports and VSM target
ports are color coordinated to represent the different zones to which they belong within the red and
blue fabrics
HP StorageWorks SAN Virtualization Services Platform administrator guide 53