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

• Each zone has a maximum of four storage device ports. (This rule is necessary when zoning larger
arrays with more storage device ports and controllers such as the XP array.)
Using these rules, each zoned DPM back-end initiator port has exactly one back-end path to each
controller in a storage device. In the case of the HP EVA being the storage device, the dual-controller
configuration translates into two paths to the EVA through each DPM back-end initiator port. The
number of overall back-end paths is dependent on the number of ports on the storage device. For
example, an HP EVA4400 has two ports on each controller, which would equal four back-end paths
through each DPM, while the HP EVA8100 has four ports on each controller that would equal eight
paths through each DPM.
Figure 14 illustrates full zoning between a dual, dual-port controller back-end storage device and the
first quad of each DPM. Paths between DPM initiator ports and storage device target ports are color
coordinated to represent the different zones to which they belong within the red and blue fabrics.
Figure 14 Zoning between 2 dual-port controllers and first quad of each DPM
.
Figure 15 illustrates full zoning between a dual, quad-port controller back-end storage device and
the first two quads of each DPM.
Zoning52