Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161696AbWKEU01 (ORCPT ); Sun, 5 Nov 2006 15:26:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161704AbWKEU01 (ORCPT ); Sun, 5 Nov 2006 15:26:27 -0500 Received: from terminus.zytor.com ([192.83.249.54]:21967 "EHLO terminus.zytor.com") by vger.kernel.org with ESMTP id S1161696AbWKEU00 (ORCPT ); Sun, 5 Nov 2006 15:26:26 -0500 Message-ID: <454E48D9.3060303@zytor.com> Date: Sun, 05 Nov 2006 12:26:01 -0800 From: "H. Peter Anvin" User-Agent: Thunderbird 1.5.0.7 (X11/20061008) MIME-Version: 1.0 To: Kyle Moffett CC: Mikulas Patocka , Albert Cahalan , kangur@polcom.net, linux-kernel@vger.kernel.org Subject: Re: New filesystem for Linux References: <787b0d920611041159y6171ec25u92716777ce9bea4a@mail.gmail.com> In-Reply-To: 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 Content-Length: 1528 Lines: 34 Kyle Moffett wrote: > On Nov 04, 2006, at 18:38:11, Mikulas Patocka wrote: >> But how will fdisk deal with it? Fdisk by default aligns partitions on >> 63-sector boundary, so it will make all sectors misaligned and >> seriously kill performance even if filesystem uses proper 8-sector >> aligned accesses. > > Don't use a partition-table format that dates back to drives with actual > reported physical geometry and which also maxed out at 2MB or so? Even > the mac-format partition tables (which aren't that much newer) don't > care about physical drive geometry. > > Besides, unless you're running DOS, Windows 95, or some random ancient > firmware that looks at your partition tables or whatever you can just > tell fdisk to ignore the 63-sector-alignment constraint and align your > partitions more efficiently anyways. But if you're dealing with > hardware so new it supports 4k or 8k sectors, you really should be using > EFI or something. > > Cheers, > Kyle Moffett > Actually, DOS/Win9x should handle arbitrary alignment just fine (except possibly some very very old versions of DOS which assumed that the first four sectors of IO.SYS all fell within the same track -- but I'm pretty sure that the FORMAT and SYS programs would align it for you.) -hpa - 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/