From owner-freebsd-questions Tue Apr 22 16:34:23 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id QAA16240 for questions-outgoing; Tue, 22 Apr 1997 16:34:23 -0700 (PDT) Received: from gdi.uoregon.edu (gdi.uoregon.edu [128.223.170.30]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id QAA16235 for ; Tue, 22 Apr 1997 16:34:17 -0700 (PDT) Received: from localhost (dwhite@localhost) by gdi.uoregon.edu (8.8.5/8.6.12) with SMTP id QAA24985; Tue, 22 Apr 1997 16:34:14 -0700 (PDT) Date: Tue, 22 Apr 1997 16:34:14 -0700 (PDT) From: Doug White X-Sender: dwhite@localhost Reply-To: Doug White To: "Jay D. Nelson" cc: freebsd-questions@freebsd.org Subject: Re: Need help with disk tuning. In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk 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