From owner-freebsd-questions@FreeBSD.ORG Fri Jul 1 17:07:51 2005 Return-Path: X-Original-To: questions@freebsd.org Delivered-To: freebsd-questions@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3808C16A41C; Fri, 1 Jul 2005 17:07:51 +0000 (GMT) (envelope-from chad@shire.net) Received: from hobbiton.shire.net (hobbiton.shire.net [166.70.252.250]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0E86D43D1D; Fri, 1 Jul 2005 17:07:50 +0000 (GMT) (envelope-from chad@shire.net) Received: from [67.161.222.227] (helo=[192.168.99.68]) by hobbiton.shire.net with esmtpa (Exim 4.51) id 1DoOzV-000Na6-4d; Fri, 01 Jul 2005 11:07:49 -0600 In-Reply-To: <20050701091954.GC83739@cirb503493.alcatel.com.au> References: <20050630205744.GN33728@ratchet.nebcorp.com> <20050630211444.19C6343D48@mx1.FreeBSD.org> <20050701091954.GC83739@cirb503493.alcatel.com.au> Mime-Version: 1.0 (Apple Message framework v730) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <07DFC3D6-E165-40F3-83FC-7AB92A1B9EF5@shire.net> Content-Transfer-Encoding: 7bit From: "Chad Leigh -- Shire.Net LLC" Date: Fri, 1 Jul 2005 11:07:48 -0600 To: Peter Jeremy X-Mailer: Apple Mail (2.730) X-SA-Exim-Connect-IP: 67.161.222.227 X-SA-Exim-Mail-From: chad@shire.net X-Spam-Checker-Version: SpamAssassin 3.0.3 (2005-04-27) on hobbiton.shire.net X-Spam-Level: X-Spam-Status: No, score=-0.2 required=5.0 tests=AWL,BAYES_50, GREYLIST_ISWHITE autolearn=disabled version=3.0.3 X-SA-Exim-Version: 4.2 (built Mon May 30 00:43:02 MDT 2005) X-SA-Exim-Scanned: Yes (on hobbiton.shire.net) Cc: FreeBSD Questions , hardware@freebsd.org Subject: Re: RAID Cards 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: Fri, 01 Jul 2005 17:07:51 -0000 On Jul 1, 2005, at 3:19 AM, Peter Jeremy wrote: > On Thu, 2005-Jun-30 17:18:15 -0400, Simon wrote: > >> It's not only CPU factor, I don't trust software RAID. >> > > I suspect you don't have a choice. Either the RAID is done in the > kernel > on your host system or the RAID is done in the the firmware on your > RAID > card. In either case, it's software. Sure, everything in the end is SW anymore, at least at a controlling level. But it does not involve the OS and can have special HW circuits used to perform certain functions much faster. It reduces the strain on the OS. Chad --- Chad Leigh -- Shire.Net LLC Your Web App and Email hosting provider chad@shire.net