AB378B Fibre Channel Mass Storage Adapter Installation Guide, February 2007

Fibre Channel Adapter Installation for HP-UX
Interpreting Legacy Hardware Paths (HP-UX 11i v1 and 11i v2)
Chapter 1
15
Table 1-4 describes each field in the hardware path.
Table 1-4 Hardware Path Field Descriptions
Field Value
Fibre Channel Topology of HBA
Fabric Topologies Private Loop
Adapter The hardware path of the Fibre Channel adapter through which the Logical Unit Number
(LUN) is seen. For multiport adapters, this field describes a specific port on the adapter.
Domain Dependent on the
Fibre Channel
topology of the HBA.
Typically the Domain ID of the
switch to which the target device is
attached, taken from the most
significant byte of the N_Port ID of
the target device.
8
HP-UX uses a Domain ID of 8 to
indicate private loops. Fibre
Channel switches seen by
HP-UX hosts cannot be
configured with domain ID of 8.
Area Depends on the
Fibre Channel
topology of the HBA.
Taken from the second byte of the
N_Port ID of the target device.
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.
0
Port 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 other LUN methods, the
value of this field is the Loop ID
of the target device.
Bus 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 LUN.
For LUNs with Volume Set Addressing (Flat Space Addressing),
the value is bits 7 - 13 of the LUN.