Q-Logic SN0054651-00 F Simple Failover Configuration, Adapter = Preferred path = Alternate path

A

System Overview Configurations

Simple Failover Configuration

Figure 2-2shows a simple failover configuration consisting of one host (X), two adapters (A and B), three dual-ported devices (0–2), and two single-ported devices (3 and 4).

Host X

Adapter

A	P	A	P		P		Target
	0	1	2	3		4
							Devices
Adapter		P	A			P
B	A
		P = Preferred path
		A = Alternate path

Figure 2-2 Simple Failover Configuration

In this configuration, connections marked P are preferred paths to a device, and connections marked A are alternate paths. Alternate paths to devices are typically hidden from the operating system and file system layers to keep them from being interpreted as two distinct devices.

SN0054651-00 F 2-3