Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263786AbUDVCzQ (ORCPT ); Wed, 21 Apr 2004 22:55:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263792AbUDVCzP (ORCPT ); Wed, 21 Apr 2004 22:55:15 -0400 Received: from hera.kernel.org ([63.209.29.2]:5592 "EHLO hera.kernel.org") by vger.kernel.org with ESMTP id S263786AbUDVCzH (ORCPT ); Wed, 21 Apr 2004 22:55:07 -0400 To: linux-kernel@vger.kernel.org From: hpa@zytor.com (H. Peter Anvin) Subject: Re: The missing RAID level Date: Thu, 22 Apr 2004 02:54:51 +0000 (UTC) Organization: Transmeta Corporation, Santa Clara CA Message-ID: References: <045P8FJ12@server5.heliogroup.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Trace: terminus.zytor.com 1082602491 12319 63.209.29.3 (22 Apr 2004 02:54:51 GMT) X-Complaints-To: news@terminus.zytor.com NNTP-Posting-Date: Thu, 22 Apr 2004 02:54:51 +0000 (UTC) X-Newsreader: trn 4.0-test76 (Apr 2, 2001) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 870 Lines: 21 Followup to: <045P8FJ12@server5.heliogroup.fr> By author: Hubert Tonneau In newsgroup: linux.dev.kernel > > So, one very interesting possibility would be to have an extra RAID level that > would do the following: > assuming that you connect 5+1 partitions, then you get 5 md partitions, not a > single one, with the following properties: > . any read to mdX goes straight forward to reading the underlying partition. > . any write goes staight forward to writting the underlying partition, but also > updates the parity on the extra partition. > You have just described RAID 4. -hpa - 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/