Apple Copper Fibre Channel Cables

I was performing some configuration on my QLogic 5602s and noticed  
some discrepancies in the speeds of my Apple copper fibre channel  
cables.   Specifically I have a variety of new (some *brand* new) 2GB  
rated cables plugged in that are showing up with media speeds rated at  
400MBytes/second.  The older 2GB cables only show up as 200MBytes/ 
second, as I would expect.   Most of these are plugged into Xserve  
RAIDs and older Xserve G5s, thus they are running at the 2GB rated  
speed.    However, for some temporary reorganization I have one of my  
Active Storage cabinets connected with these 2GB cables.   Since  
everything is currently set to auto for the relevant ports, I had  
assumed it would downgrade itself to 2GB, but to my surprise it is  
connected at 4GB.

So my question is, will this be problematic and thus should I manually  
set the ports to be 2GB or have I simply been lucky enough to get some  
4GB cables for a 2GB price?

FWIW, the media part number and revision of the 2GB cables are all the  
same according to the switches (73929-0074 revision D).   My actual  
4GB cables report themselves as 74743-0021 revision A.


David

Library Information Technology
Michigan State University

http://programerror.com

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