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Path: sserve!newshost.anu.edu.au!munnari.oz.au!spool.mu.edu!howland.reston.ans.net!pipex!uknet!EU.net!ieunet!news.ieunet.ie!jkh From: jkh@whisker.lotus.ie (Jordan K. Hubbard) Newsgroups: comp.os.386bsd.misc Subject: Re: FreeBSD FAST SCSI-II performance... Date: 29 Dec 1993 12:36:51 GMT Organization: Dublin, Ireland Lines: 27 Distribution: world Message-ID: <JKH.93Dec29043651@whisker.lotus.ie> References: <2fqsee$b16@cruella.ee.pdx.edu> NNTP-Posting-Host: whisker.lotus.ie In-reply-to: erich@cruella.ee.pdx.edu's message of 28 Dec 1993 19:10:06 -0800 In article <2fqsee$b16@cruella.ee.pdx.edu> erich@cruella.ee.pdx.edu (Erich S. Boleyn) writes: Anyway, my question is: What kind of performance should I expect when running the UntraStor 34F LB controller in FAST SCSI-II mode? You should get very good performance - one of our developers just got himself one of these (I presume you mean an `UltraStor' :-) and says it screams. The system runs reliably, so I don't think it is any kind of motherboard error, but it is just way too slow for FAST & synchronous operation. Get the freely available iozone program and run it - let me know what it says. I'm curious how slow "slow" is. I have it connected to a Barracuda I FAST SCSI-II hard drive, with the jumpers to initiate synchronous operation (etc.), but when running a simple benchmark, only get throughputs of just under 1 MB/sec (not so hot). Seek times are fast enough, How is the controller itself set up? Is it possible you have it misconfigured? Jordan -- (Jordan K. Hubbard) jkh@violet.berkeley.edu, jkh@al.org, jkh@whisker.lotus.ie FreeBSD Core Team, American Liver Association, Hedgehog Breeders Society