From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Martin K. Petersen" Subject: Re: [PATCH, RFC] mke2fs: get device topology values from blkid Date: Sun, 20 Sep 2009 16:46:00 -0400 Message-ID: References: <4AB2B6B9.7010506@redhat.com> <4AB397F3.3090206@redhat.com> <20090918202814.GC2537@webber.adilger.int> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "Martin K. Petersen" , Eric Sandeen , ext4 development To: Andreas Dilger Return-path: Received: from acsinet12.oracle.com ([141.146.126.234]:65282 "EHLO acsinet12.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750937AbZITUrH (ORCPT ); Sun, 20 Sep 2009 16:47:07 -0400 In-Reply-To: <20090918202814.GC2537@webber.adilger.int> (Andreas Dilger's message of "Fri, 18 Sep 2009 14:28:14 -0600") Sender: linux-ext4-owner@vger.kernel.org List-ID: >>>>> "Andreas" == Andreas Dilger writes: Andreas> Yes, there is more chance that writing sector 7 (due to 4k Andreas> sector r-m-w) will cause collateral damage, but the truth even Andreas> today is that disks are not going to fail a single 512-byte Andreas> sector at one time, but more likely 64kB (or whatever the Andreas> remapping unit size is), so this isn't really introducing a new Andreas> failure mode. I keep hearing this disk drive "internal block size" of 32KB or 64KB being mentioned. And yet none of the drive firmware engineers I talk to on a regular basis have ever heard of such a thing... -- Martin K. Petersen Oracle Linux Engineering