A6826A Fibre Channel Mass Storage Adapter Installation Guide, February 2007
Fibre Channel Adapter Installation for HP-UX
Interpreting Lunpath Hardware Paths (HP-UX 11i v3)
Chapter 1
16
Interpreting Lunpath Hardware Paths (HP-UX 11i v3)
Lunpath hardware paths are a new representation of hardware paths introduced on HP-UX 11i v3, as part of
the new agile representation of mass storage devices. For more details, please refer to the Next Generation
Mass Storage Stack HP-UX 11i v3 white paper at
http://docs.hp.com/en/netsys.html#Storage%20Area%20Management .
This section describes how to interpret address elements in lunpath hardware paths. It also shows how to
map between the legacy hardware path and lunpath hardware path formats.
Components of Lunpath Hardware Paths
The lunpath hardware path has three parts:
1. The HBA path is composed of a series of bus-nexus addresses, separated by a slash (/). It is identical to the
HBA portion of a legacy hardware path.
2. The target address is transport-specific. With Fibre Channel, it is a port identifier. When printed by I/O
commands like ioscan, the target address is separated from the HBA path by a period (.) and is printed in
hexadecimal notation.
3. The LUN address is a SCSI 64-bit LUN indentifier, built from the address method and the LUN number.
When printed by I/O commands, it is separated from the target address by a period (.) and is printed in
hexadecimal notation.
The following table provides four examples:
Fibre Channel
The target address for a Fibre Channel device is the target port’s worldwide port name (WWPN). The
fcmsutil command with the get remote option displays the WWPN as the Target Port World Wide Name. In
this example, the WWPN is 0x500805f300083899:
# fcmsutil /dev/td0 get remote all
Target N_Port_id is = 0x010700
Target state = DVS_READY
Symbolic Name =
Port Type = N_PORT
SLER Capable (supports Retry & TRID) = NO
Target Port World Wide Name = 0x500805f300083899
Table 1-4
Lunpath Hardware path
HBA
path
Target address LUN address
0/5/1/0.0x50060e8004276e12.0x40000000000
00000
0/5/1/0 0x50060e8004276e12 0x4000000000000000
0/4/1/0.0x500805f300083899.0x40100000000
00000
0/4/1/0 0x500805f300083899 0x4010000000000000