It gets even worse -- a 6228 HBA can eat the entire available bandwidth
of a PCI bus (per IBM's doc) so each card should be on a separate PCI
bus with very little else on the bus. There are only 3 PCI buses in the
I/O drawers used by most of the 6000s currently installed. And, like
Remco said -- do the math.

Tom Kauffman
NIBCO, Inc

> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
> Of rh
> Sent: Thursday, August 05, 2004 7:09 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: FC 3590E1A per HBA
> 
> Hi,
> 
> I saw somewhere in the list that IBM recommends two
> 3590 FC drives per HBA. Is this published somewhere or
> just "word of mouth"? If there is a planning document
> that discusses this I would be interested in the link.
> I currently have 16 drives across four 6228 HBA's on
> an AIX box. I've seen some discussions and math about
> throughput etc., but there should be some rule of
> thumb that can guide me to whether I have a
> "reasonable' configuration or not. HBA's aren't cheap
> so I'd hate to require 8 of them.
> 
> Thanks,
> Rod Hroblak
> ADP
> 
> 
> 
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