Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750876AbWHZUzo (ORCPT ); Sat, 26 Aug 2006 16:55:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750885AbWHZUzn (ORCPT ); Sat, 26 Aug 2006 16:55:43 -0400 Received: from ug-out-1314.google.com ([66.249.92.171]:3475 "EHLO ug-out-1314.google.com") by vger.kernel.org with ESMTP id S1750872AbWHZUzn (ORCPT ); Sat, 26 Aug 2006 16:55:43 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=Ss3u9CvFFoPygFGl7CK4F3OKejalOe/bZoeJpFLzNoRSdUYXyk1X/tzPxPJ17YY2d9m/2tQVb+WOv1JW7Zs22L7xFHGFdd/ogRTB2/3nAp6+kQ1yTsRVCAwbKtPihHL/gfkPn8PhdqbWI+tNZ19S2hOFEHonfrZXfzNfF4kLgfM= Message-ID: Date: Sat, 26 Aug 2006 13:55:36 -0700 From: "Dan Williams" To: "H. Peter Anvin" Subject: Re: Linux: Why software RAID? Cc: "Chris Friesen" , "Jeff Garzik" , "Linux Kernel" , "Linux RAID Mailing List" , marc@perkel.com In-Reply-To: <44ED3851.7040202@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <44ED1E41.40606@garzik.org> <44ED3723.3090308@nortel.com> <44ED3851.7040202@zytor.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1314 Lines: 36 On 8/23/06, H. Peter Anvin wrote: > Chris Friesen wrote: > > Jeff Garzik wrote: > > > >> But anyway, to help answer the question of hardware vs. software RAID, > >> I wrote up a page: > >> > >> http://linux.yyz.us/why-software-raid.html > > > > Just curious...with these guys > > (http://www.bigfootnetworks.com/KillerOverview.aspx) putting linux on a > > PCI NIC to allow them to bypass Windows' network stack, has anyone ever > > considered doing "hardware" raid by using an embedded cpu running linux > > software RAID, with battery-backed memory? > > > > It would theoretically allow you to remain feature-compatible by > > downloading new kernels to your RAID card. > > > > Yes. In fact, I have been told by several RAID chip vendors that their > customers are *strongly* demanding that their chips be able to run Linux > md (and still use whatever hardware offload features.) > > So it's happening. Speaking of md with hardware offload features: http://prdownloads.sourceforge.net/xscaleiop/ols_paper_2006.pdf?download > -hpa Dan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/