I am attempting to solve a performance issue on a E2900 server. Line
traces of the Fibre Channel are pointing towards bus congestion inside
the host. (Incoming frames are being processed slowly, and outgoing
frames are dribbling out, one-by-one.)

I had the sysadmin pull prtdiag, and it is telling me that there are
Emulex 9002DC's (I don't know the official Sun name) in slots PCI3 and
PCI4, running at 33MHz. The only other card listed in the system is a
Quad GigE in PCI5, supposedly running at 66MHz.

According to the reference docs, slots 4 and 5 are supposed to share
the same bus, and therefore required to have the same bus speed. How
then can PCI4 then be at 33MHz and PCI5 be at 66MHz? Did somebody at
Sun not get the memo that the slots are numbered starting at zero?

In any case, why would these adapters be running at 33MHz? They are
capable of 66MHz operation, and I know of no way to jumper them
otherwise. Are the onboard devices slowing down the PCI slots?

And no, unfortunately, I have no access to the servers. I am in one
city, the sysadmin is in another, and the server in a third.

Thanks in advance for your help,

SirWired