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Path: sserve!newshost.anu.edu.au!munnari.oz.au!constellation!osuunx.ucc.okstate.edu!moe.ksu.ksu.edu!vixen.cso.uiuc.edu!howland.reston.ans.net!math.ohio-state.edu!caen!usenet.coe.montana.edu!osyjm From: osyjm@cs.montana.edu (Jaye Mathisen) Newsgroups: comp.os.386bsd.questions Subject: Re: SCSI-2 adapter recommendation for 386bsd Date: 27 Aug 1993 17:03:09 GMT Organization: Computer Science, MSU, Bozeman MT, 59717 Lines: 29 Message-ID: <25leod$k8d@pdq.coe.montana.edu> References: <25jsns$gj4@pdq.coe.montana.edu> <1993Aug27.093605.3190@info.brad.ac.uk> NNTP-Posting-Host: schizo.coe.montana.edu In article <1993Aug27.093605.3190@info.brad.ac.uk>, Thomas Sandford <t.d.g.sandford@bradford.ac.uk> wrote: |Jaye Mathisen (osyjm@cs.montana.edu) wrote: |: In article <25jh8g$r5h@milou.eunet.fi>, |: Bror 'Count' Heinola <count@muncca.fi> wrote: |: > ... (about the Adaptec 1542c) |: > |: > I don't have any complaints, except transfer speed is pretty slow, |: > only about 250k / write and 600k / read... Disk is Seagate ST41200N |: > (CDC Imprimis Wren VII), 1GB 5.25" FH. | |: Seems pretty abysmal, Have you tried messing with block sizes/frag sizes/ |: rotdelay (Somebody told me rotdelay of 1 is the same as 4, but I haven't |: verified this), and that kind of stuff? | |How do I go about finding the transfer speed for my drive/adapter combination? |I also have the 1542c and have had no problems with it. I would go snarf up a copy of iozone, and use it. Or you can create a really big file, and then dd it to the null device and time that. Nate here has a 1542B off a 486-33, and with a dec RZ26, we were getting 1.4-1.6MB's/second with 20MB files. -- Jaye Mathisen, COE Systems Manager (406) 994-4780 410 Roberts Hall,Dept. of Computer Science Montana State University,Bozeman MT 59717 osyjm@cs.montana.edu