HP Fibre Channel Host Bus Adapters manual Lun

Table 1-3	Hardware Path Field Descriptions (Continued)
Field	Value	Fibre Channel Topology of HBA
		Fabric Topologies	Private Loop
Area	Depends on the	Taken from the second byte of the	0
	Fibre Channel	N_Port ID of the target device.
	topology of the HBA.
		On some switches, the second byte of
		the N_Port ID encodes the switch
		port to which the device is
		connected. The encoding method
		depends on the switch. See your
		switch manual to interpret this
		field.
Port	Depends on the	For LUNs with Peripheral Device Addressing,
	Fibre Channel	the value of this field is always 255.
	topology of the HBA
		For other LUN methods, the value of	For other LUN methods, the
	and the target
		this field is the least significant byte	value of this field is the Loop ID
	device, and on the
		of the N_Port ID of the target device.	of the target device.
	LUN addressing
	method used.
Bus	Depends on the	For LUNs with Peripheral Device	For LUNs with Peripheral Device
	Fibre Channel	Addressing, the value of this field is	Addressing, the value of this field
	topology of the HBA	the upper 4 bits of the least	is the upper 4-bits of the Loop
	and the target	significant byte of the N_Port ID of	ID of the target device.
	device, and on the	the target device.
	LUN addressing
		For LUNs with Logical Unit Addressing,
	method used.
		the value is the Bus Number field of the LUN.
		For LUNs with Volume Set Addressing (Flat Space Addressing),
		the value is bits 7 - 13 of the LUN.
Target	Depends on the	For LUNs with Peripheral Device	With Peripheral Device
	Fibre Channel	Addressing, the value of this field is	Addressing, the value of this field
	topology and the	the lower 4-bits of the third byte of	is the lower 4-bits of the Loop ID
	LUN addressing	the N_Port ID of the target device.	of the target device.
	method used.
		This field usually corresponds to the
		Arbitrated Loop Physical Address
		(AL_PA) of the target device.
		For LUNs with Logical Unit Addressing,
		the value is the Target field of the LUN.
		For LUNs with Volume Set Addressing (Flat Space Addressing),
		the value is bits 3 - 6 of the LUN.
LUN	Depends only on the LUN addressing method used.

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