From: Steven Sim (steven.sim@faplccc.net)
Date: Tue Jan 18 2005 - 22:05:42 EST
Hello Sun Managers;
There are several questions I wished to ask here but before I do, a little
background.
I have argued fervently for all Emulex LP9002 and Quad Gigabit Ethernet HBAs
(x4444A) to be placed on 66 Mhz slots as far as possible. (as opposed to
randomly being placed on available 33 Mhs slots)
I have been asked to justify my recommendations formally in writing, as well
as provide a performance differential between the two. (assuming same HBAs)
I have searched docs.sun.com and Sun Blue Prints online but cannot find a
formal statement stating that these HBAs would work better on the 66 Mhz
slots as opposed to 33 Mhz.
Could anybody assist?
My 2nd question is more academic. Why are there so little 66 Mhz slots on
the 880 and 1280?? There's only one 66 Mhz slot on the 880 and 1280. This
design simply does not make sense to me.
Most critical Enterprise systems which I interact with use either DMP or
MPxIO for dual pathing of their Fiber Channels HBAs. This consideration
alone should dictate the need for at least 2 x 66 Mhz slots in each of the
above systems.
I must be missing something here. Or is the performance profile of the 66
Mhz not much different from that of the 33 Mhz?
Warmest Regards
Steven Sim
Fujitsu Asia Pte. Ltd.
_____________________________________________________
This e-mail is confidential and may also be privileged. If you are not the intended recipient, please notify us immediately. You should not copy or use it for any purpose, nor disclose its contents to any other person.
Opinions, conclusions and other information in this message that do not relate to the official business of my firm shall be understood as neither given nor endorsed by it.
_______________________________________________
sunmanagers mailing list
sunmanagers@sunmanagers.org
http://www.sunmanagers.org/mailman/listinfo/sunmanagers
This archive was generated by hypermail 2.1.7 : Wed Apr 09 2008 - 23:30:02 EDT