AD299A/AD355A Fibre Channel Mass Storage Adapters Installation Guide

Fibre Channel Adapter Installation for HP-UX
Interpreting Hardware Paths
Chapter 1
18
Interpreting Hardware Paths
Example 1-1 and 1-2 illustrate the Fibre Channel hardware path format:
Example 1-1 Hardware Path for a Direct Fabric Attach Device
Example 1-2 Hardware Path for a Private Loop Device
Table 1-3 describes each field in the hardware path.
Table 1-3 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
Adapter Area Port Bus Target LUNDomain
0/1/2/0.1.19.255.0.0.0
Adapter Area Port Bus Target LUNDomain
0/1/2/0.8.0.255.0.1.0