topic Re: FC Speed in Operating System - HP-UX

FC Speed

Eric Jacklin — Mon, 07 Dec 2009 09:04:15 GMT

Hi,

I am having 3 HP rp4440 servers among them 2 server is having 2GB FC card So can i change the 3 server FC Speed from 4gb to 2 GB ?
If yes how ?

I want to do this because my SAN switch support only 2 GB.

FC Model :HP AB378-60101 4Gb Single Port PCI/PCI-X Fibre Channel Adapte

OS : HPUX B 11.11

Re: FC Speed

HCL Ash — Mon, 07 Dec 2009 09:16:38 GMT

4GB/S cards are supposed to step down automatically.

You should see if the speed is hardcoded into the configuration file

Re: FC Speed

Johnson Punniyalingam — Mon, 07 Dec 2009 09:19:56 GMT

Hi Eric,

No problem "Fc card" will detect them automatically hence all FC cards in HP-UX boxes *always* auto-negotiate

Check below thread for more information.

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1351059

Thanks,
Johnson

Re: FC Speed

Johnson Punniyalingam — Mon, 07 Dec 2009 09:22:37 GMT

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Re: FC Speed

sujit kumar singh — Mon, 07 Dec 2009 10:49:00 GMT

Hi as said earlier these cards will auto-negotiate the sppeds.
the operating speed can be seen from the fcmsutil O/P

ioscan -kfnCfc
get the device file like /dev/fcd0 or /dev/td1
fcmsutil /dev/fcd9
root # fcmsutil /dev/fcd9

Vendor ID is = 0x001077
Device ID is = 0x002312
PCI Sub-system Vendor ID is = 0x00103c
PCI Sub-system ID is = 0x0012ba
PCI Mode = PCI-X 133 MHz
ISP Code version = 3.3.18
ISP Chip version = 3
Topology = PTTOPT_FABRIC
Link Speed = 2Gb -- THIS SHOWS THE OPERATING LINK SPEED.
Local N_Port_id is = 0x2b0600
Previous N_Port_id is = None
N_Port Node World Wide Name = 0x50060b0000329b5b
N_Port Port World Wide Name = 0x50060b0000329b5a
Switch Port World Wide Name = 0x200600051e534d12
Switch Node World Wide Name = 0x100000051e534d12
Driver state = ONLINE
Hardware Path is = 1/0/10/1/1
Maximum Frame Size = 2048
Driver-Firmware Dump Available = NO
Driver-Firmware Dump Timestamp = N/A
Driver Version = @(#) libfcd.a HP Fibre Channel ISP 23xx & 24xx Driver B.11.23.04 /ux/core/isu/FCD/kern/src/common/wsio/fcd_init.c:Oct 18 2005,08:21:11

regards
sujit

Re: FC Speed

Viktor Balogh — Tue, 08 Dec 2009 14:32:59 GMT

>So can i change the 3 server FC Speed from 4gb to 2 GB ?

Hmm. You don't need to do on the OS side anything. Go and tell the SAN Team to set the FC Switch port to 2GBps. All the FC HBAs on HP-UX are set to autonegotiation, we can't set it to an explicit speed.

Re: FC Speed

Viktor Balogh — Tue, 08 Dec 2009 14:37:37 GMT

You can verify the speed of all your FC HBAs this way:

# for i in /dev/fcd*
do
echo $i"\c"
fcmsutil $i | grep "Link Speed"
done
/dev/fcd0 Link Speed = 2Gb
/dev/fcd1 Link Speed = 2Gb
#