From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S938024AbWLHLAW (ORCPT ); Fri, 8 Dec 2006 06:00:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S938025AbWLHLAW (ORCPT ); Fri, 8 Dec 2006 06:00:22 -0500 Received: from smtp-out001.kontent.com ([81.88.40.215]:57023 "EHLO smtp-out.kontent.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1425360AbWLHLAU (ORCPT ); Fri, 8 Dec 2006 06:00:20 -0500 From: Oliver Neukum To: Matthias Schniedermeyer Subject: Re: single bit errors on files stored on USB-HDDs via USB2/usb_storage Date: Fri, 8 Dec 2006 12:01:36 +0100 User-Agent: KMail/1.8 Cc: Stefan Richter , Robert Hancock , linux-kernel , DervishD References: <45793D82.1040807@s5r6.in-berlin.de> <457940DC.90403@citd.de> In-Reply-To: <457940DC.90403@citd.de> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200612081201.36789.oliver@neukum.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Am Freitag, 8. Dezember 2006 11:39 schrieb Matthias Schniedermeyer: > > I.e. it's nearly impossible for noisy hardware to _silently_ cause data > > corruption. I would suppose USB has similar CRC checks. It has. > > Also, you mentioned that the corruption occurs systematically on certain > > byte patterns. Therefore it's certainly not related to the cables. > > It'd guess that too, but who can that say for sure. :-| You may have a bit pattern that stresses the controllers and suddenly a marginal cable may matter. Regards Oliver