Date: Tue, 22 Apr 1997 16:34:14 -0700 (PDT) From: Doug White <dwhite@gdi.uoregon.edu> To: "Jay D. Nelson" <jdn@qiv.com> Cc: freebsd-questions@freebsd.org Subject: Re: Need help with disk tuning. Message-ID: <Pine.BSF.3.96.970422163328.24344f-100000@localhost> In-Reply-To: <Pine.NEB.3.95.970421190647.628A-100000@acp.qiv.com>
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On Mon, 21 Apr 1997, Jay D. Nelson wrote: > I'm about to add a new Hawk to my system and would like to optimize all of > my drives. Maybe I haven't R'ed enough of TFM. If so, please point me in > the right direction. > > The default disklabel defines a disk at 3600 RPM with an interleave of 1. > Are these numbers _actually_ used? Can performance be boosted by defining > rotational speed as 5400 (or whatever the drive is rated) with an > interleave of 0? I don't believe they are. If you use the automatically created disklabel it should work out fine. > If I do this, I suspect I'm pushing the envelope (Tekram SCSI card on an > ISA bus). Would I gain anything by increasing block and fragment size? > Say 16k block and 2k fragment? Or -- what about a block size of a full > cylinder with a fragment of 1/8th cylinder? The defaults should be okay, unless you're running a news server. Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major
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