AB378A Fibre Channel Mass Storage Adapter Installation Guide, December 2005

Fibre Channel Adapter Installation
Interpreting Hardware Paths
Chapter 1
15
Port The value depends
on the Fibre
Channel topology of
the HBA and the
target device, and on
the LUN addressing
method used.
For LUNs with Peripheral Device
Addressing, the value of this field is
always 255.
For other LUN methods, the value of
this field is the least significant byte
of the N_Port ID of the target device.
For LUNs with Peripheral Device
Addressing, the value of this field
is always 255.
For other LUN methods, the
value of this field is the Loop ID
of the target device.
Bus The value depends
on the Fibre
Channel topology of
the HBA and the
target device, and on
the LUN addressing
method used.
For LUNs with Peripheral Device
Addressing, the value of this field is
the upper 4-bits of the least
significant byte of the N_Port ID of
the target device.
For LUNs with Peripheral Device
Addressing, the value of this field
is the upper 4-bits of the Loop
ID of the target device.
For LUNs with Logical Unit Addressing, the value is the Bus Number
field of the Logical Unit Number.
For LUNs with Volume Set Addressing (Flat Space Addressing), the
value is bits 7 - 13 of the Logical Unit Number
Target The value depends
on both the Fibre
Channel topology
and the LUN
addressing method
used.
For LUNs with Peripheral Device
Addressing, the value of this field is
the lower 4-bits of the third byte of
the N_Port ID of the target
device.
With Peripheral Device
Addressing, the value of this field
is the lower 4-bits of the Loop ID
of the target device.
For LUNs with Logical Unit Addressing, the value is the Target field of
the Logical Unit Number.
For LUNs with Volume Set Addressing (Flat Space Addressing), the
value is bits 3 - 6 of the Logical Unit Number.
LUN The value of this field depends only on the LUN addressing method used, see below.
Table 1-5
LUN
Addressing
Method
Peripheral Device
Addressing
Logical Unit Addressing
Volume Set Addressing
(Flat Space Addressing)
Value of LUN
field in FC
HW Path
The Target or LUN field of
the Logical Unit Number.
The LUN field of the
Logical Unit Number.
Bits 0 - 2 of the Logical Unit
Number.
For more information about the fields in the Logical Unit Number, please refer to the SCSI Architecture
Model - 3 (SAM-3) standards document.
Table 1-4 (Continued)
Field Value Information
Fibre Channel Topology of HBA
Direct Fabric Attach Private Loop