FC link speed 2Gb but HBA is 4GB

[pa8700]

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

[Johnson Punniyalingam]

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 :(

[Johnson Punniyalingam]

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

[Johnson Punniyalingam]

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

[Duncan Edmonstone]

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

[AVV]

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]

Dear All here is the magic

fcmsutil /dev/fcd0 force_speed 2G

[Torsten.]

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