AD299A/AD355A Fibre Channel Mass Storage Adapters Installation Guide

Fibre Channel Adapter Installation for HP-UX
Interpreting Hardware Paths
Chapter 1
19
1
LUN Addressing Method Value of LUN field in Fibre Channel hardwarePath.
Peripheral Device Addressing The Target or LUN field of the Logical Unit Number.
Logical Unit Addressing The LUN field of the Logical Unit Number.
Volume Set Addressing
(Flat Space Addressing) Bits 0 - 2 of the Logical Unit Number.
For more information about the fields in the Logical Unit Number, please see the SCSI Architecture Model - 3
(SAM-3) standards document.
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.
Target Depends on 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.
This field usually corresponds to the
Arbitrated Loop Physical Address
(AL_PA) 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 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 (see list following this table).
1
Table 1-3 Hardware Path Field Descriptions (Continued)
Field Value
Fibre Channel Topology of HBA
Fabric Topologies Private Loop