From owner-freebsd-questions@FreeBSD.ORG Tue Mar 15 19:17:36 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 00D93106564A for ; Tue, 15 Mar 2011 19:17:36 +0000 (UTC) (envelope-from freebsd_user@guice.ath.cx) Received: from guice.ath.cx (wsip-98-191-59-226.ri.ri.cox.net [98.191.59.226]) by mx1.freebsd.org (Postfix) with ESMTP id 954578FC15 for ; Tue, 15 Mar 2011 19:17:35 +0000 (UTC) Received: from wtp1.ath.cx (localhost [127.0.0.1]) by guice.ath.cx (8.14.4/8.14.4) with ESMTP id p2FJHYwT034590 for ; Tue, 15 Mar 2011 15:17:34 -0400 (EDT) (envelope-from freebsd_user@guice.ath.cx) Received: from 98.191.59.226 (SquirrelMail authenticated user email) by wtp1.ath.cx with HTTP; Tue, 15 Mar 2011 15:17:34 -0400 Message-ID: <5ab7e13805185464a4adf0c5d326671e.squirrel@wtp1.ath.cx> In-Reply-To: <201103151041.56373.erich@alogreentechnologies.com> References: <8a6023db5a3d4c8b34161f7ee0af29bb.squirrel@wtp1.ath.cx> <201103151041.56373.erich@alogreentechnologies.com> Date: Tue, 15 Mar 2011 15:17:34 -0400 From: freebsd_user@guice.ath.cx To: freebsd-questions@freebsd.org User-Agent: SquirrelMail/1.4.21 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal Subject: Re: IDE -- mount partitions for better performance X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Mar 2011 19:17:36 -0000 Annotated below ... > Hi, > > On Tuesday 15 March 2011 07:00:30 freebsd_user@guice.ath.cx wrote: >> freebsd-questions@freebsd.org >> >> Guidance with the following: >> >> We are limited to Support for ATA-100/66/33 IDE and ATAPI compliant >> devices. With that said, we have our atapi/33 optical on a add in >> controller (PCI) and are seeking to place four HDD’s on the main boards >> controllers. Our dilemma is where to place /, /tmp, /usr and /var from >> a >> performance standpoint. We understand that /var does quite a bit of >> writing and probably should go on the master hdd, but what about the >> /usr, >> /tmp and root? Hell, I’m not sure my thinking is sane as to where I >> ‘think’ /var should be placed/mounted. >> > did I get it right? You have four hard disks? Yes, four separate HDD's > > If so, place /, /var /tmp on indiidual drives. Make the fourth disk usr > and mount the remaining space of the other three disks inside /usr/home. Are you suggesting something similar to: /dev/ad4s1a for / /dev/ad4s2a for /tmp /dev/ad4s3a for /usr /dev/ad4s4a for /var If so, my initial can current concern is which device (hdd) from the above list/configuration, should be connected to which cable connector (master or slave)? --depending on how much writing to a particular device is taking place; for instance during a 'build world' or while building anything from src. there is quite a bit of writing going on. I would think that making the disk/slice that is being written to a slave would decrease performance when the master to that slave is also being written to simultaneously. In such a case the slave would need to wait until the master is done writing before the slave would be able to write; Is my thinking on this sane? Please enlighten me/us. Thank you. > > Locate then stuff on the other three disks which you expect to be used in > parallel with the /usr disk. I'm lost on the above suggestion; not understanding this. > > Of course, you can mount it anywhere else if you want. > > Erich > >