From owner-freebsd-hackers Thu Sep 10 07:11:57 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id HAA29858 for freebsd-hackers-outgoing; Thu, 10 Sep 1998 07:11:57 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from tim.xenologics.com (tim.xenologics.com [194.77.5.24]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id HAA29844 for ; Thu, 10 Sep 1998 07:11:51 -0700 (PDT) (envelope-from seggers@semyam.dinoco.de) Received: (from uucp@localhost) by tim.xenologics.com (8.8.5/8.8.8) with UUCP id QAA25035; Thu, 10 Sep 1998 16:06:46 +0200 (MET DST) Received: from semyam.dinoco.de (semyam.dinoco.de [127.0.0.1]) by semyam.dinoco.de (8.9.1/8.8.8) with ESMTP id KAA06802; Thu, 10 Sep 1998 10:40:22 +0200 (CEST) (envelope-from seggers@semyam.dinoco.de) Message-Id: <199809100840.KAA06802@semyam.dinoco.de> To: Mike Knoll cc: hackers@FreeBSD.ORG, seggers@semyam.dinoco.de Subject: Re: ccd'ed disks In-reply-to: Your message of "Mon, 07 Sep 1998 12:44:54 EDT." <199809071630.MAA20264@lafcol> Date: Thu, 10 Sep 1998 10:40:21 +0200 From: Stefan Eggers Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > I have two IDE disks, different size, and was wondering if I'd benifit from > ccd'ing them with striping. I understand IDE has some issues that make I put a second IDE disk into my system. Both are configured as master and are on the primary and secondary controller on an ASUS board with 430FX chipset (I think) and PIIX (looked up in dmesg output). To get more swap space and improve performance I of course created a swap partition on the new disk. I noticed that during paging it can get about double the amount of data to disk then. How near I am to the theoretical doubling I don't know as the disks are not the same type. As paging internally does the same ccd does for a filesystem I'd give it a try and make some testing to see how much speed one can get out of it. Stefan. -- Stefan Eggers Lu4 yao2 zhi1 ma3 li4, Max-Slevogt-Str. 1 ri4 jiu3 jian4 ren2 xin1. 51109 Koeln Federal Republic of Germany To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message