HP StorageWorks NAS Data Path Manager Software - Manual (Page 12)

NAS Data Path Manager
12 hp StorageWorks NAS Data Path Manager Installation and User’s Guide
Data Path Concepts
Data paths exist wherever there are physical connections from an initiator (a NAS
server HBA) to a target (an array controller). Data Path Manager manages traffic
patterns among all available paths between the NAS server HBAs and the LUNs
in your arrays.
Figure 1: Preferred (optimal) and Alternate (non-optimal) Paths
Each path is comprised of the HBA, controller, and any necessary networking
hardware. NAS Data Path Manager evaluates the paths and determines which are
considered optimal and which are non-optimal. This is determined by looking at
the overhead associated with transferring data from the NAS 8000 to a specific
LUN on an associated storage device.