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Path: sserve!newshost.anu.edu.au!munnari.oz.au!bunyip.cc.uq.oz.au!harbinger.cc.monash.edu.au!yeshua.marcam.com!MathWorks.Com!europa.eng.gtefsd.com!howland.reston.ans.net!pipex!uknet!demon!dearg.cuillin.org.uk!dearg.cuillin.org.uk!guy From: guy@dearg.cuillin.org.uk (Guy Dawson) Newsgroups: comp.os.386bsd.questions Subject: Re: Hardware for *BSD next weekend! Date: 12 Apr 1994 16:29:15 GMT Organization: Cuillin Lines: 35 Distribution: world Message-ID: <2oei8r$bc5@dearg.cuillin.org.uk> References: <2nip6pINNgm7@grumpy.symantec.com> <1994Apr3.054516.27308@hal.depaul.edu> <Co43us.61x@latcs1.lat.oz.au> <michaelv.766119620@ponderous.cc.iastate.edu> NNTP-Posting-Host: dearg.cuillin.org.uk In article <michaelv.766119620@ponderous.cc.iastate.edu>, michaelv@iastate.edu (Michael L. VanLoon) writes: [ stuff about the VL300 card being based on the Adaptec 6360 chip like the AHA-1522 PIO card ] |> Even though this card may work under Linux, understand that there is |> no support for it that I know of under NetBSD or FreeBSD. Also, |> please realize that this card, like IDE, requires the CPU to do all |> the work and will be *much* slower than an intelligent SCSI card such |> as the BusLogic cards or the Adaptec 154x and 174x. It's up to you, |> but be aware of the limitations before you buy. Disk transfer may not be much slower with the CPU performing the I/O data transfers to and from the card and memory. However, since *BSD and Linus are multi-tasking the CPU will be busy doing the transfers and the processing of *OTHER* tasks will suffer. The big win with DMA is not faster transfers but a free CPU while the transfer is occuring. This is reflected in better throughtput over all... |> |> -- |> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |> Michael L. VanLoon Iowa State University Computation Center |> michaelv@iastate.edu Project Vincent Systems Staff |> Free your mind and your machine -- NetBSD free Un*x for PC/Mac/Amiga/etc. |> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Guy -- -------------------------------------------------------------------------- Guy Dawson home : guy@cuillin.org.uk work : guyd@hoskyns.co.uk 4.4>5.4 4.4>5.4 4.4>5.4 4.4>5.4 4.4>5.4 4.4>5.4 4.4>5.4 4.4>5.4 4.4>5.4