HP Fibre Channel Mass Storage Adapters Support Guide FibrChanl-02 (fclp) Driver HP-UX 11i v2 and 11i v3

Table 3 Hardware Path Field Descriptions
Fibre Channel Topology of HBA
ValueField
Private LoopFabric Topologies
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.
Adapter
8: HP-UX uses a Domain ID of 8 to
indicate private loops. Fibre Channel
Typically the Domain ID of the switch to
which the target device is attached, taken
Dependent on the Fibre
Channel topology of the
HBA.
Domain
switches seen by HP-UX hosts cannot
be configured with domain ID of 8.
from the most significant byte of the
N_Port ID of the target device.
0Taken from the second byte of the N_Port
ID of the target device. On some switches,
Depends on the Fibre
Channel topology of the
HBA.
Area
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.
For LUNs with Peripheral Device Addressing, the value of this field is always 255.Depends on the Fibre
Channel topology of the
Port
For other LUN methods, the value of
this field is the Loop ID of the target
device.
For other LUN methods, the value of this
field is the least significant byte of the
N_Port ID of the target device.
HBA and the target
device, and on the LUN
addressing method used.
For LUNs with Peripheral Device
Addressing, the value of this field is
For LUNs with Peripheral Device
Addressing, the value of this field is the
Depends on the Fibre
Channel topology of the
Bus
the upper 4-bits of the Loop ID of the
target device.
upper 4 bits of the least significant byte
of the N_Port ID of the target device.
HBA and the target
device, and on the LUN
addressing method used.
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.
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 Peripheral Device
Addressing, the value of this field is the
lower 4-bits of the third byte of the N_Port
Depends on the Fibre
Channel topology and
the LUN addressing
method used.
Target
ID of the target device. 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.
Depends only on the LUN addressing method used.LUN
Table 4 LUN Terminology
DefinitionTerm
Value of LUN field in Fibre Channel hardwarePath.LUN Addressing Method
The Target or LUN field of the Logical Unit Number.Peripheral Device Addressing
The LUN field of the Logical Unit Number.Logical Unit Addressing
Bits 0 - 2 of the Logical Unit Number.Volume Set Addressing (Flat Space Addressing)
For more information about the fields in the Logical Unit Number, please see the SCSI Architecture
Model - 3 (SAM-3) standards document.
Fibre Channel devices can connect to a fabric using either Direct Fabric Attach or Public Loop.
Different devices can have different types of connections to the same fabric; for example, an HBA
can have a Direct Fabric Attach connection to the fabric, while an array has a Public Loop
connection to the same fabric.
Interpreting Hardware Paths 11