Hi

Trying to find some tool that will show fc load on hba interfaces on RHEL5/6.
Sth like fcstat in AIX.

Is there sth on the market ?

I would think this would be vendor specific. The two main fibre cards in intel class systems come from Qlogic and Emulex. For Qlogic you can install scli and get information about their cards that way. (You can get this from Qlogic's web site.) I assume Emulex has something similar but haven't used those.

Is this scli free ?

Yes.

try systool or multipath

http://www.cyberciti.biz/faq/linux-f...e-information/

thanks regards

systool is available in RHEL but not necessarily installed. Also on checking one of my RHEL5 boxes with Qlogic HBAs I don't have either class mentioned in the link. One would have to determine classes by doing ls -l /sys/class. That shows qla2xxxx but one would also need to be aware that there are entries under scsi related to the disks for the fibre presented array. On my RHEL6 box using Qlogic the two classes in the link exist but sysfsutils that has the systool command wasn't installed.

I'm not sure how multipath answers the OP's question. It is used as implied by its name to bind multiple paths to the same disk into a single multipath device which should be used for LVM or partitioning rather than the /dev/sd devices to insure that if one path goes down things continue to work. Is there some sort of performance metrics it provides of which I'm unaware? Also if the user does NOT have multiple paths to devices then it seems this wouldn't be of use. I guess you COULD put a single path into a multipath config but why bother? (Having said that I DO of course, recommend having multiple paths and using multipath for disk presentation.)