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Newsgroups: comp.os.386bsd.bugs Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!haven.umd.edu!uunet!mnemosyne.cs.du.edu!nyx!smace From: smace@nyx.cs.du.edu (Scott Mace) Subject: Re: IOZONE results Message-ID: <1993Mar18.211720.5548@mnemosyne.cs.du.edu> X-Disclaimer: Nyx is a public access Unix system run by the University of Denver for the Denver community. The University has neither control over nor responsibility for the opinions of users. Sender: usenet@mnemosyne.cs.du.edu (netnews admin account) Organization: Nyx, Public Access Unix at U. of Denver Math/CS dept. References: <C43MBo.3owM@austin.ibm.com> Date: Thu, 18 Mar 93 21:17:20 GMT Lines: 38 In article <C43MBo.3owM@austin.ibm.com> fredriks@austin.ibm.com (Lars Fredriksen) writes: > >Hi, > This is not a bug per se, as much as a request to see what >other people are seeing. > > I ran iozone auto on my machine and got the maximum of 500K/s >throughtput. I saw a report from someone running Interactive Unix on >a 50MHz 486 with a Bustek controller getting 4.5M/s. 500K/s is average for a SCSI-1 asynchronous device. You didn't metion what kind of drive they were using when it tested at 4.5M/s. Also Interactive Unix may be using a large buffer cache as well. > > My machine is a 33MHz 486 with 128K of cache, 16Mb of Memory, > with an Adaptec 174x controller. I have Julians scsi drivers, > and the drive is supposed to be capable of 5M/s. Are you running the drive in synchronous mode? > >Anyone have a clue to why I am seeing a factor of 10 difference? I have a 386-33 and a Adaptec 1542B. Coupled with a maxtor LXT-340s SCSI-2 drive I get about 1000-1100K/s. The spec for my drive says it will run up to 20 Mbits/s or about 2.5M/s. With a Seagate st-1096N SCSI-1 drive I get about 400-500K/s. If your drive is if fact capable of running at 5Megabytes/sec then you must have a hardware setup problem. Scott Mace -- ********************************************************************* * Scott Mace internet: smace@nyx.cs.du.edu * * emace@tenet.edu * *********************************************************************