From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263462AbTJ0Ssw (ORCPT ); Mon, 27 Oct 2003 13:48:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263467AbTJ0Ssw (ORCPT ); Mon, 27 Oct 2003 13:48:52 -0500 Received: from thebsh.namesys.com ([212.16.7.65]:38116 "HELO thebsh.namesys.com") by vger.kernel.org with SMTP id S263462AbTJ0Ssv (ORCPT ); Mon, 27 Oct 2003 13:48:51 -0500 Message-ID: <3F9D6891.5040300@namesys.com> Date: Mon, 27 Oct 2003 21:48:49 +0300 From: Hans Reiser User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5) Gecko/20031007 X-Accept-Language: en-us, en MIME-Version: 1.0 To: "Mudama, Eric" CC: "'Norman Diamond'" , "'Wes Janzen '" , "'Rogier Wolff '" , "'John Bradford '" , linux-kernel@vger.kernel.org, nikita@namesys.com, "'Pavel Machek '" , "'Justin Cormack '" , "'Vitaly Fertman '" , "'Krzysztof Halasa '" Subject: Re: Blockbusting news, results get worse References: <785F348679A4D5119A0C009027DE33C105CDB3B0@mcoexc04.mlm.maxtor.com> In-Reply-To: <785F348679A4D5119A0C009027DE33C105CDB3B0@mcoexc04.mlm.maxtor.com> X-Enigmail-Version: 0.76.7.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Mudama, Eric wrote: > > or put it under heavy write workload and remove >power. > Can you tell us more about what really happens to disk drives when the power is cut while a block is being written? We engage in a lot of uninformed speculation, and it would be nice if someone who really knows told us.... Do drives have enough capacitance under normal conditions to finish writing the block? Does ECC on the drive detect that the block was bad and so we don't need to detect it in the FS? -- Hans