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Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!simtel!noc.netcom.net!news.sprintlink.net!gatech!news.mathworks.com!news.kei.com!ddsw1!news1.best.com!shell1.best.com!not-for-mail From: rcarter@best.com (Russell Carter) Newsgroups: comp.unix.bsd.netbsd.misc Subject: Re: Commerical OS's (was Re: aha0: DMA beyond end of ISA) Date: 17 May 1995 09:22:12 -0700 Organization: Best Internet Communications, Inc. (info@best.com) Lines: 29 Message-ID: <3pd7s5$6i9@shell1.best.com> References: <MICHAELV.95May12222703@MindBender.HeadCandy.com> <1995May16.114607.16086@zippy.dct.ac.uk> <3pc8u8$66g@news.cloud9.net> NNTP-Posting-Host: shell1.best.com In article <3pc8u8$66g@news.cloud9.net>, Thor Lancelot Simon <tls@cloud9.net> wrote: >In article <1995May16.114607.16086@zippy.dct.ac.uk>, >Angus Marshall <amm@tremas.dct.ac.uk> wrote: >>michaelv@MindBender.HeadCandy.com (Michael L. VanLoon) writes: [ stuff deleted ] >I am not happy with the performance I get from the NetBSD/FreeBSD ncr >driver, however. I plan to switch the '825 system to a BT956C as soon as >I can get my hands on one. The 53c8XX hardware has a reputation for good >performance, so I'm pretty sure this is a driver issue. >-- The FreeBSD and NetBSD drivers are related, but perhaps not the same? I see better than 4 MB/s from most 5400 rpm drives, and better than 5.5 MB/s from 7200 rpm drives with the FreeBSD ncr 810 driver. I know of a system with 4 ncr 53c810 cards driving 4 5400rpm disks at an aggregate bandwidth > 12 MB/s using the same driver. That's pretty good performance, IMHO. Regards, Russell >Thor Lancelot Simon tls@cloud9.net > >Somewhere they're meeting on a pinhead, calling you an angel.