Fibre channel hardware path format

[M.Thomas]

Dear Admins,
Can any one explain me what is domain, area , port, bus & target in fibre channel hardware path and how to find that value from fcmsutil command

# fcmsutil /dev/td0

Vendor ID is = 0x00103c
Device ID is = 0x001028
TL Chip Revision No is = 2.3
PCI Sub-system Vendor ID is = 0x00103c
PCI Sub-system ID is = 0x000006
Topology = PTTOPT_FABRIC
Local N_Port_id is = 0x643600
N_Port Node World Wide Name = 0x50060b00000aa733
N_Port Port World Wide Name = 0x50060b00000aa732
Driver state = ONLINE
Hardware Path is = 0/2/0/0
Number of Assisted IOs = 653913
Number of Active Login Sessions = 1
Dino Present on Card = NO
Maximum Frame Size = 960
Driver Version = @(#) libtd.a HP Fibre Channel Tachyon TL/TS/XL2 Driver B.11.11.12 (AR1204) /ux/kern/kisu/TL/src/common/wsio/td_glue.c : Oct 11 2004, 14:45:41



# ioscan –f
disk 150 0/2/0/0.100.12.0.0.3.4 sdisk CLAIMED DEVICE EMC
SYMMETRIX

Fibre channel hardware path

0/2/0/0.100.12.0.0.3.4

0/2/0/0 : hardware path of the Fibre Channel adapter
100 : Domain
12: Area
0: Port
0: Bus
3: Target
4: LUN


Thanks in advance
Thomas

[whiteknight]

Thomas


Please refer this url for explanation.

http://docs.hp.com/en/J6374-90059/ch02s07.html

Hope this help

WK

[Torsten.]

It depends ;-)

The path will be different if you use different switches (M-series switches are using an offset - B-series does not).

"3: Target
4: LUN"

does only apply for "pure" SCSI, in a SAN it is again different - it's LUN 28.

This is called volume set addressing.