From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Lord Subject: Re: WD20EARS: finally reporting 4KByte sector size! Date: Wed, 18 May 2011 19:19:57 -0400 Message-ID: <4DD4541D.9090606@teksavvy.com> References: <4DD0A00D.3030104@teksavvy.com> <4DD44B9C.1050809@hardwarefreak.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from ironport2-out.teksavvy.com ([206.248.154.181]:62023 "EHLO ironport2-out.pppoe.ca" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755604Ab1ERXT7 (ORCPT ); Wed, 18 May 2011 19:19:59 -0400 In-Reply-To: <4DD44B9C.1050809@hardwarefreak.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Stan Hoeppner Cc: IDE/ATA development list On 11-05-18 06:43 PM, Stan Hoeppner wrote: > On 5/15/2011 10:54 PM, Mark Lord wrote: >> I picked up my third WD 2TB "Green" drive today, >> and lo and behold.. the firmware (51.0AB51) actually >> reports the real physical sector size (finally!). > >> Logical Sector size: 512 bytes >> Physical Sector size: 4096 bytes > > What is the positive significance of this change? What does this > materially change for the better? Filesystems in the kernel can auto-align themselves for performance, and I noticed that "fdisk" saw the 4KB sector size and adjusted itself to put sector-1 at offset 64 instead of offset 63, saving me the trouble. -ml