Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751528AbXAVKji (ORCPT ); Mon, 22 Jan 2007 05:39:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751529AbXAVKji (ORCPT ); Mon, 22 Jan 2007 05:39:38 -0500 Received: from ns.firmix.at ([62.141.48.66]:44150 "EHLO ns.firmix.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751519AbXAVKjh (ORCPT ); Mon, 22 Jan 2007 05:39:37 -0500 Subject: Re: PROBLEM: KB->KiB, MB -> MiB, ... (IEC 60027-2) From: Bernd Petrovitsch To: Krzysztof Halasa Cc: Jan Engelhardt , Heikki Orsila , Bodo Eggert <7eggert@gmx.de>, Tony Foiani , Leon Woestenberg , linux-kernel@vger.kernel.org, David Schwartz In-Reply-To: References: <7FsPf-51s-9@gated-at.bofh.it> <7FxlV-3sb-1@gated-at.bofh.it> <7FyUF-5XD-21@gated-at.bofh.it> <20070121150618.GA11613@zakalwe.fi> Content-Type: text/plain Organization: Firmix Software GmbH Date: Mon, 22 Jan 2007 11:39:19 +0100 Message-Id: <1169462359.6167.49.camel@tara.firmix.at> Mime-Version: 1.0 X-Mailer: Evolution 2.8.2.1 (2.8.2.1-3.fc6) Content-Transfer-Encoding: 7bit X-Firmix-Scanned-By: MIMEDefang 2.56 on ns.firmix.at X-Firmix-Spam-Score: -2.413 () AWL,BAYES_00,FORGED_RCVD_HELO X-Firmix-Spam-Status: No, hits=-2.413 required=5 X-Spam-Score: -2.413 () AWL,BAYES_00,FORGED_RCVD_HELO Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1520 Lines: 37 On Mon, 2007-01-22 at 02:56 +0100, Krzysztof Halasa wrote: > Jan Engelhardt writes: > > > Bleh. Except for storage, base 1024 was used for almost everything > > I remember. 4 MB memory meant 4096 KB, and that's still the case today. > > Most likely the same for transfer rates. > > Nope, transfer rates were initially 1000-based: 9.6 kbps = 9600 bps, > 28.8 kbps = 28800 bps, 64 kbps = 64000 bps. Then it went 128, 256, > 512 kbps = 512000 bps and 1 Mbps = 2 * 512 kbps = 1024000 bps. ACK. But this and harddisk sizes are really the only areas. > But it's limited mostly to serial interfaces. Other networks use > 10, 1000 etc. because they have nothing natural in (powers of) 2 > so 1 Mbps may be 1000000 bps as well. > > > It's just that storage vendors broke the computer rule and went with 1000. > > 1024 etc. is (should be) natural to disks because the sector size > is 512 B, 2048 B or something like that. Yes, but it sounds in commercials better if there is a larger number there. And you can raise the result of a fraction if you lower the divisor. Bernd -- Firmix Software GmbH http://www.firmix.at/ mobil: +43 664 4416156 fax: +43 1 7890849-55 Embedded Linux Development and Services - 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/