From owner-freebsd-isp Fri Dec 18 00:26:59 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id AAA07396 for freebsd-isp-outgoing; Fri, 18 Dec 1998 00:26:59 -0800 (PST) (envelope-from owner-freebsd-isp@FreeBSD.ORG) Received: from allegro.lemis.com (allegro.lemis.com [192.109.197.134]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id AAA07391 for ; Fri, 18 Dec 1998 00:26:56 -0800 (PST) (envelope-from grog@freebie.lemis.com) Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by allegro.lemis.com (8.9.1/8.9.0) with ESMTP id SAA13971; Fri, 18 Dec 1998 18:56:37 +1030 (CST) Received: (from grog@localhost) by freebie.lemis.com (8.9.1/8.9.0) id SAA18562; Fri, 18 Dec 1998 18:56:37 +1030 (CST) Message-ID: <19981218185636.Z486@freebie.lemis.com> Date: Fri, 18 Dec 1998 18:56:36 +1030 From: Greg Lehey To: sthaug@nethelp.no Cc: patton@sysnet.net, dswartz@druber.com, freebsd-isp@FreeBSD.ORG Subject: Re: RAID solutions? References: <19981218131434.M486@freebie.lemis.com> <5412.913964735@verdi.nethelp.no> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.91.1i In-Reply-To: <5412.913964735@verdi.nethelp.no>; from sthaug@nethelp.no on Fri, Dec 18, 1998 at 08:05:35AM +0100 WWW-Home-Page: http://www.lemis.com/~grog Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Friday, 18 December 1998 at 8:05:35 +0100, sthaug@nethelp.no wrote: >> Striping (``RAID 0'') will give you better speed for concurrent >> access, which is what you are talking about here. Mirroring (RAID-1) >> will give you better read performance, assuming your system balances >> reads across the mirror, but worse write performance. > > ... and the FreeBSD ccd mirroring does *not* balance the reads. It always > reads from the first disk in a mirror. Correct. But that's about the only package that does. Use vinum instead; it's much more advanced. Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message