From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Martin K. Petersen" Subject: Re: ATA support for 4k sector size Date: Thu, 26 Feb 2009 15:35:47 -0500 Message-ID: References: <1235600698-6446-1-git-send-email-matthew@wil.cx> <49A5CBF7.9000501@zytor.com> <20090226025043.GJ1363@mit.edu> <20090226030735.GA16891@parisc-linux.org> <49A6B604.1060702@zytor.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from rcsinet12.oracle.com ([148.87.113.124]:21886 "EHLO rgminet12.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754566AbZBZUgx (ORCPT ); Thu, 26 Feb 2009 15:36:53 -0500 In-Reply-To: <49A6B604.1060702@zytor.com> (H. Peter Anvin's message of "Thu\, 26 Feb 2009 07\:32\:20 -0800") Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: "H. Peter Anvin" Cc: "Martin K. Petersen" , Matthew Wilcox , Theodore Tso , linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org, sandeen@redhat.com >>>>> "hpa" == H Peter Anvin writes: >> Quick answer from one of my contacts. Desktop drives will indeed >> ship with an alignment of 1(*). The alignment is hardwired at time >> of manufacture and can't be changed. >> hpa> Oh God. hpa> This is a disaster. Rationale being that modern Microsoft operating systems know how to interpret the alignment bits. Legacy XP will work without changes thanks to the shifted alignment. And Vista+ will do the right thing to align partition 1 to what the drive reports. Also note that Windows only aligns the first partition. That's something we need to be aware of when setting up dual boot systems. -- Martin K. Petersen Oracle Linux Engineering