FW 05.01.00 and SW 07.01.00 HP StorageWorks SAN High Availability Planning Guide (AA-RS2DC-TE, June 2003)

Planning Considerations for Fibre Channel Topologies
62 SAN High Availability Planning Guide
Figure 22: Switched mode operation
Public Versus Private Devices
Arbitrated loop switches support connection of public and private arbitrated loop
devices as follows:
■ Public device — A loop device that can transmit a fabric login (FLOGI)
command to the switch, receive acknowledgement from the switch’s login
server, register with the switch’s name server, and communicate with
fabric-attached devices is a public device. Public devices communicate with
fabric-attached devices through the switch’s B_Port connection to a director.
As shown in Figure 23, server S
2
is a public loop device that can
communicate with fabric-attached device D
1
. The switch mode (shared or
switched) does not affect device communication.