Date: Mon, 8 May 1995 15:02:18 -0700 (PDT) From: Julian Elischer <julian@ref.tfs.com> To: rgrimes@gndrsh.aac.dev.com (Rodney W. Grimes) Cc: tom@haven.uniserve.com, hackers@FreeBSD.org Subject: Re: Is a 486 fast enough for SCSI? Message-ID: <199505082202.PAA14965@ref.tfs.com> In-Reply-To: <199505081929.MAA01292@gndrsh.aac.dev.com> from "Rodney W. Grimes" at May 8, 95 12:29:49 pm
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> > > > > > You also failed to mention the model of the drives, a parameters like > RPM that greatly effect the raw data rate of the drive (if you have > the media transfer rate number that is the best one to use, it is > usually a range of values due to ZBR recording. The higher number is > what you get for the outer cyclinders, the lower number for the inner > cylinders). one other thing that should be mentionned is that it is possible to DE_TUNE your filesystem so it will slow down.. try tunefs and set you maxcontig to 64 and the seektime to 0 ms It also helps to tell newfs that you have only 1 head but a LOT of sectors per track.. this defeats some code that makes the wrong choices for SCSI type disks (and some IDE now) julian
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