Brocade DCX "portcfgfill" at 8 Gb/s

We had an interesting question come up today, and I wanted to bounce it off you (I’m opening a case with EMC also.).

We recently bought an HP c7000 Blade Enclosure with HP FlexFabric modules in the back.  8 Gb/s.  We’ve been having trouble with the Linux servers on the Blades with SAN Storage. Dm-mpio failed paths.  After some research we (not me) found the following article on the Internet:

                http://community.brocade.com/thread/6287

which says we should set “portcfgfillword” to 3 for our Blade Chassis with FlexFabric modules with 8 Gb/s ports.

Is this true?  What do you know about this?

We also bought a new HP 3PAR P10000 V400 Storage Array with 8 Gb/s ports.  Should we set “portcfgfillword” to 3 for those ports also?  Should we set ALL 8 Gb/s GBICs on the DCX SAN Switches portcfgfillword” to 3?  When we do the ISL between the 2 x logical fabrics should we set those 8 Gb/s ports to portcfgfillword” to 3?

I also saw a case in this forum about "portcfgfillword", but no concrete answers.

   Stuart