From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (ext-mx11.extmail.prod.ext.phx2.redhat.com [10.5.110.16]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id p2EHX5nj009132 for ; Mon, 14 Mar 2011 13:33:05 -0400 Received: from mailmx.futuresource.com (mailmx.futuresource.com [208.10.26.74]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id p2EHWuW6018423 for ; Mon, 14 Mar 2011 13:32:56 -0400 Received: from ns4.futuresource.com ([208.10.26.50]) by mailmx.futuresource.com (8.13.8/8.13.8) with ESMTP id p2EHVwIS028271 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 14 Mar 2011 12:31:59 -0500 Received: from [172.22.181.98] ([172.22.181.98]) by ns4.futuresource.com (8.13.8/8.13.8) with ESMTP id p2EHWqco001307 for ; Mon, 14 Mar 2011 12:32:53 -0500 Message-ID: <4D7E5144.7060200@gmail.com> Date: Mon, 14 Mar 2011 12:32:52 -0500 From: Les Mikesell MIME-Version: 1.0 References: <4D7E4689.9060300@cox.net> <20110314171726.GA18249@redhat.com> In-Reply-To: <20110314171726.GA18249@redhat.com> Content-Transfer-Encoding: 7bit Subject: Re: [linux-lvm] Advanced Format disks mixed with regular disks? Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: linux-lvm@redhat.com On 3/14/2011 12:17 PM, Mike Snitzer wrote: > >> Is there any concern with mixing 4KB-sector drives with 512-byte >> sector drives in the same LV? > > Both LVM2 and Device Mapper have been updated to accommodate stacking > such a mix of drives. > > See this for a bit more detail: > http://people.redhat.com/msnitzer/docs/io-limits.txt > > Particularly, the "Stacking I/O Limits" section. > > The concern raised for partial (4k) writes to the 512b drive was > discussed a bit more here: http://lkml.org/lkml/2010/2/22/295 Are there any version-level hints about when/where these changes appear and come together in the real world (i.e. distributions like RHEL, debian, Ubuntu)? -- Les Mikesell lesmikesell@gmail.com