Planning For Private Arbitrated Loop Connectivity; Private Loop Connectivity - HP StorageWorks 64 - SAN Director Switch Planning Manual

Planning Considerations for Fibre Channel Topologies
B_Port
Embedded FL_Port
Figure 26: Private loop connectivity

Planning for Private Arbitrated Loop Connectivity

Private arbitrated loop topology supports the clustering of isolated servers and
storage subsystems into workgroup or departmental SANs. This topology is well
suited to small and mid-sized configurations where modest connectivity levels and
high data transmission speeds are required. The topology also supports low-cost
switching and connectivity in environments where the per-port cost of a director is
prohibitive.
Private arbitrated loop topology:
■
■
■
66
Loop Switch
D1
S1
Supports the connection of up to 125 node (device) ports.
Reduces connection costs by distributing the routing function through each
loop port (loop functionality is a small addition to normal Fibre Channel port
functionality).
Provides a fully blocking architecture that allows a single connection between
any pair of loop ports at any time. Connections between a third loop port and
busy ports are blocked until communication between the first connection pair
ends.
H_Ports
SAN High Availability Planning Guide