HBA Speed difference - same HBA model, same switch

[Simon Green_2]

Hi all,

Appreciate if someone could assist with this strange one.

We've got a couple of Proliant DL boxes with two HP 81q HBA's installed in each. BIOS is disabled for the cards. The HBA's are plugged into two HP 8/20q switches - all is working fine.

For some reason two cards in one server both login to the switch and register at 8GB/s and the other two cards register at 4GB/s.

We can see no difference here excepting that the server models are different generation. The firmware on the servers is fully up to date.

Regards,

Simon

[Torsten.]

You have 4 cards in 1 server all connected to the same switch?

It could also be an issue at the switch side (firmware etc), why not fix the port speed at the switch?

[Simon Green_2]

Thanks for the reply.

We have two 8/20q switches configured as two seperate fabrics. Each server has a one connection to each fabric.

I will look at setting the port speed maually although my inquisitive nature wants to know why this is happening...

Regards,

Simon

[Torsten.]

As said, switch firmware is important too.

I have never seen them, but this is probably the right page:

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=3662824&prodTypeId=12169&prodSeriesId=3662821&swLang=13&taskId=135&swEnvOID=54