I notice that I have one drive in an SSA loop that is communicating at
20 MB instead of 40. Of course the drives that butt up against this
drive are at 20 on the side where they touch, but otherwise everything
is running at 40. I have no link/speed errors getting logged and I am
totally up to date on all microcode for the adapters, disk and
enclosures. Of course my cables are also rated at 40.

Anyone ever see this before I call IBM?