From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: ATA 4 KiB sector issues. Date: Wed, 17 Mar 2010 00:37:02 +0900 Message-ID: <4B9FA59E.1000402@kernel.org> References: <4B947393.2050002@kernel.org> <201003100046.24695.arnd@arndb.de> <1158166a1003100114j6ea329fbh84bfad65dcac90bf@mail.gmail.com> <4B9EED55.10201@kernel.org> <1268720060.21384.10.camel@mulgrave.site> <4B9F2388.2030803@kernel.org> <1268745897.21384.14.camel@mulgrave.site> <4B9F8E1A.2020608@kernel.org> <1268749297.21384.15.camel@mulgrave.site> <4B9F9AAF.6080709@kernel.org> <1268751748.21384.18.camel@mulgrave.site> <4B9FA1C6.7090305@kernel.org> <1268752993.21384.23.camel@mulgrave.site> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from hera.kernel.org ([140.211.167.34]:52702 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933100Ab0CPPfJ (ORCPT ); Tue, 16 Mar 2010 11:35:09 -0400 In-Reply-To: <1268752993.21384.23.camel@mulgrave.site> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: James Bottomley Cc: Denys Vlasenko , Arnd Bergmann , "linux-ide@vger.kernel.org" , lkml , Daniel Taylor , Jeff Garzik , Mark Lord , tytso@mit.edu, "H. Peter Anvin" , hirofumi@mail.parknet.co.jp, Andrew Morton , Alan Cox , irtiger@gmail.com, Matthew Wilcox , aschnell@suse.de, knikanth@suse.de Hello, On 03/17/2010 12:23 AM, James Bottomley wrote: >> So, using custom geometry doesn't help compatibility at all. > > Our partitioning tool still obey the integral cylinder rule ... we can > argue about whether they should, but what we need is a strategy for > fixing what is rather than what should be. The updated ones don't anymore. They just align to 1MiB + whatever the drive requests for offset (the offset-by-one thing). They will basically behave the same as windows vista/7 ones, so it's already fixed. What we can argue is whether adding CHS tricks on top to make those larger alignments somewhat meaningful w/ CHS interpretation too, which I'm objecting on the ground that it doesn't help compatibility at all. Thanks. -- tejun