Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754140AbYAQCDR (ORCPT ); Wed, 16 Jan 2008 21:03:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752881AbYAQCDD (ORCPT ); Wed, 16 Jan 2008 21:03:03 -0500 Received: from smtp-out.google.com ([216.239.33.17]:39283 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752834AbYAQCDA (ORCPT ); Wed, 16 Jan 2008 21:03:00 -0500 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=received:message-id:date:from:to:subject:cc:in-reply-to: mime-version:content-type:content-transfer-encoding: content-disposition:references; b=OMM8Xi1fD6U9YkjYTQKuhYbWXSAHsB2aP5R2wzr7vczKgFX+Og2sE1bKG5X+2YzCL ypANtupsWtrw8O3y8mRcg== Message-ID: <4d47a5d10801161802x2c24ef59pf8422c8d14d487aa@mail.gmail.com> Date: Wed, 16 Jan 2008 21:02:50 -0500 From: "Daniel Phillips" To: "Bryan Henderson" Subject: Re: [Patch] document ext3 requirements (was Re: [RFD] Incremental fsck) Cc: "Al Boldi" , "Alan Cox" , "David Chinner" , linux-kernel@vger.kernel.org, "Pavel Machek" , "Rik van Riel" , "Theodore Tso" , "Valerie Henson" In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <4d47a5d10801151724m418e18efp9a0dd936e9a3584c@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 788 Lines: 19 On Jan 16, 2008 2:06 PM, Bryan Henderson wrote: > >The "disk motor as a generator" tale may not be purely folklore. When > >an IDE drive is not in writeback mode, something special needs to done > >to ensure the last write to media is not a scribble. > > No it doesn't. The last write _is_ a scribble. Have you observed that in the wild? A former engineer of a disk drive company suggests to me that the capacitors on the board provide enough power to complete the last sector, even to park the head. Regards, Daniel -- 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/