From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263599AbTJQTwY (ORCPT ); Fri, 17 Oct 2003 15:52:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263602AbTJQTwY (ORCPT ); Fri, 17 Oct 2003 15:52:24 -0400 Received: from main.gmane.org ([80.91.224.249]:18078 "EHLO main.gmane.org") by vger.kernel.org with ESMTP id S263599AbTJQTwU (ORCPT ); Fri, 17 Oct 2003 15:52:20 -0400 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: mru@users.sourceforge.net (=?iso-8859-1?q?M=E5ns_Rullg=E5rd?=) Subject: Re: Software RAID5 with 2.6.0-test Date: Fri, 17 Oct 2003 21:52:17 +0200 Message-ID: References: <1065690658.10389.19.camel@slurv> <3F903768.7060803@rackable.com> <20031017193756.GH8711@unthought.net> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Complaints-To: usenet@sea.gmane.org User-Agent: Gnus/5.1002 (Gnus v5.10.2) XEmacs/21.4 (Rational FORTRAN, linux) Cancel-Lock: sha1:ixjF7cWyHHalMnlcROr115lXSWA= Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Jakob Oestergaard writes: >> > many clock cycles availble to it. It's even worse when you realize >> > the 2Ghz xeon is a better proccessor in many more ways than just >> > clock cycles. >> >> How about this logic: >> >> 1) If the processor on the RAID controller can handle the full >> bandwidth of the disks, it's fast enough. >> 2) If someone else does the 10% work, the CPU can do 10% more work. > > 3) You have a four year old machine - one day the RAID controller dies. > The company that produced it has been acquired by someone else, and > the product is no longer availble. Can you get a new adapter with > firmware that can actually read your disks? Or are your data lost? > Can you find a replacement controller on e-bay? And would you want > to? What are backups for? That argument applies to any controller, for anything. What if you wanted to read those old 8" floppies? Or that hard disk from the PDP/11. If a four year old RAID controller breaks, maybe it's time to get new disks anyway. -- Måns Rullgård mru@users.sf.net