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FC Speed

 
Eric Jacklin
Regular Advisor

FC Speed

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
6 REPLIES
HCL Ash
Frequent Advisor

Re: FC Speed

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

You should see if the speed is hardcoded into the configuration file
Johnson Punniyalingam
Honored Contributor

Re: FC Speed

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
Problems are common to all, but attitude makes the difference
Johnson Punniyalingam
Honored Contributor

Re: FC Speed

ITRC member since: October 05, 2006
Last contribution date: December 07, 2009
I have assigned points to 34 of 254 responses to my questions.

Please assign points for your people who help to try to resolve your problem, for their suggestion and knowledge sharing,
Problems are common to all, but attitude makes the difference
sujit kumar singh
Honored Contributor

Re: FC Speed

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
Viktor Balogh
Honored Contributor

Re: FC Speed

>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.
****
Unix operates with beer.
Viktor Balogh
Honored Contributor

Re: FC Speed

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
#

****
Unix operates with beer.