On Thu, 5 Aug 2004 17:08:34 -0700 rh <[EMAIL PROTECTED]> wrote: > 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. >
Well, you could do the math: a 3590 does somewhere between 15 and 20 MB/s a HBA does either 100 or 200 MB/s, and will perform at about half of that, maybe a bit better. So if you have 16 drives,, they will generate about 320 MB/s of data. If you have 4 2 GB/s HBA's they will do about 400-600 MB/s so you're ok, if you have 4 1 GB/s HBA's they will do between 200 and 300 MB/s, so you might not get the maximum performance out of your drives. > Thanks, > Rod Hroblak > ADP > > > > __________________________________ > Do you Yahoo!? > Yahoo! Mail is new and improved - Check it out! > http://promotions.yahoo.com/new_mail -- Met vriendelijke groeten, Remco Post SARA - Reken- en Netwerkdiensten http://www.sara.nl High Performance Computing Tel. +31 20 592 3000 Fax. +31 20 668 3167 "I really didn't foresee the Internet. But then, neither did the computer industry. Not that that tells us very much of course - the computer industry didn't even foresee that the century was going to end." -- Douglas Adams
