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FC link speed 2Gb but HBA is 4GB

pa8700
Regular Advisor

FC link speed 2Gb but HBA is 4GB

One of our HBA is 4GB but the fcmsutil link speed is showing 2 GB. We checked with SAN team they told we need to change the speed fron Unix side then they will change the speed at the switch .Using the fcmsutil is it possible to chnage the HBA speed

c 6 0/0/12/1/0 fcd CLAIMED INTERFACE HP AB379-60101 4Gb Dual Port PCI/PCI-X Fibre Channel Adapter (FC Port 1)
/dev/fcd6
7 REPLIES
Johnson Punniyalingam
Honored Contributor

Re: FC link speed 2Gb but HBA is 4GB

Certification: HP CSE 11.31,CSA 11.31,ITIL V3
ITRC member since: June 30, 2008
Last contribution date: January 29, 2010
I have assigned points to 9 of 160 responses to my questions.


Oooops !!! You know why you d'not Get replies,

OO .. God, Please look at you points assignments looks very scary :(
Problems are common to all, but attitude makes the difference
Johnson Punniyalingam
Honored Contributor

Re: FC link speed 2Gb but HBA is 4GB

Please do assign points for people who spend their valuable time & sharing knowledge in helping to resolve your problem & advice


Hope You can't do "Change the Speed" speed settings are hardcoded into the configuration file.

Check Below thread

http://forums13.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1264825721585+28353475&threadId=1391752
Problems are common to all, but attitude makes the difference
Johnson Punniyalingam
Honored Contributor

Re: FC link speed 2Gb but HBA is 4GB

The SAN Team, would have told you that you check the issue by using "fcmsutil" command,

Double confirm with "SAN" does Speed settings are correct from "Switch & Sotrage" side,???

Hence Speed are hard coded by "Firmware of the Fc_Card"

so you can try "disbale and enable" your fc_Card -> make_sure you umount_file_system,deactivate you VG"

or

try to upgrade your "Fc_Card" firmware version
Problems are common to all, but attitude makes the difference
Duncan Edmonstone
Honored Contributor

Re: FC link speed 2Gb but HBA is 4GB

all HP-UX FC cards auto-negotiate their link speed. So if the card as auto-neg'd to 2Gb its because the switch port its connected to is set to 2Gb. What model switch is it attached to? Is your SAN team sure that switch is a 4Gb switch?

HTH

Duncan

HTH

Duncan
AVV
Super Advisor

Re: FC link speed 2Gb but HBA is 4GB

Hi,


Give the output of fcmsutil to the storage team and say there are no possibility to change the same from OS end. They have to do something from their side, may be a firmware upgrade.
pa8700
Regular Advisor

Re: FC link speed 2Gb but HBA is 4GB

Dear All here is the magic

fcmsutil /dev/fcd0 force_speed 2G
Torsten.
Acclaimed Contributor

Re: FC link speed 2Gb but HBA is 4GB

AFAIK this will be valid only until next reboot - so it isn't a long term solution.

Hope this helps!
Regards
Torsten.

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