From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762873AbYEGHtk (ORCPT ); Wed, 7 May 2008 03:49:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762412AbYEGHsy (ORCPT ); Wed, 7 May 2008 03:48:54 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:38747 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1758454AbYEGHsv (ORCPT ); Wed, 7 May 2008 03:48:51 -0400 Date: Wed, 7 May 2008 08:39:17 +0100 From: Alan Cox To: "Bart Van Assche" Cc: "Yigal Sadgat" , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, jwboyer@linux.vnet.ibm.com, joern@logfs.org Subject: Re: Compact Flash Question Message-ID: <20080507083917.6eebf110@core> In-Reply-To: References: <005b01c8afc4$77f4ec90$6401a8c0@techwriter> X-Mailer: Claws Mail 3.3.1 (GTK+ 2.12.5; x86_64-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > For most Linux filesystems you really need wear leveling. E.g. ext3's > superblock is at a fixed location and gets overwritten frequently. > Without wear leveling you risk that the flash sector where the > superblock resides wears out early. CF sector mappings are not simple 1:1 mappings with flash blocks so this is not the case. It is true with raw flash but not with CF. What CF requires is vendor dependent but most vendors are pretty sensible. The noatime advice is however good.