From owner-freebsd-fs@FreeBSD.ORG Sat Feb 20 10:05:25 2010 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 460DA106566C for ; Sat, 20 Feb 2010 10:05:25 +0000 (UTC) (envelope-from mailinglists@debank.tv) Received: from smtpout01.onlinespamfilter.nl (smtpout01.onlinespamfilter.nl [217.21.240.161]) by mx1.freebsd.org (Postfix) with ESMTP id F294F8FC17 for ; Sat, 20 Feb 2010 10:05:24 +0000 (UTC) Received: from smtp.onlinespamfilter.nl (localhost [127.0.0.1]) by smtp.onlinespamfilter.nl (Postfix) with ESMTP id 7427425079 for ; Sat, 20 Feb 2010 10:47:04 +0100 (CET) Received: from smtp.debank.tv (59-80-ftth.onsneteindhoven.nl [88.159.80.59]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.onlinespamfilter.nl (Postfix) with ESMTP for ; Sat, 20 Feb 2010 10:47:04 +0100 (CET) Received: from smtp.debank.tv (smtp.debank.tv [172.16.143.25]) by smtp.debank.tv (Postfix) with ESMTP id 2B3371DB2161 for ; Sat, 20 Feb 2010 10:47:04 +0100 (CET) Received: from Rob-Everss-Mac-Pro.local (121-73-247-214.broadband.telstraclear.net [121.73.247.214]) (using SSLv3 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: rob) by smtp.debank.tv (Postfix) with ESMTPSA id 659F11DB1FDA for ; Sat, 20 Feb 2010 10:47:03 +0100 (CET) Message-ID: Date: Sat, 20 Feb 2010 22:47:05 +1300 From: mailinglists User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.1.7) Gecko/20100111 Thunderbird/3.0.1 MIME-Version: 1.0 To: freebsd-fs@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV using ClamSMTP @ debank.tv X-OSF-Virus: CLEAN X-OSF-Outgoing: Innocent X-OSF-SUM: e7531071831ef4c088902a8b5fe94dab X-OSF-Info: Checked for spam and viruses Subject: zfs on 4k sector disks X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 20 Feb 2010 10:05:25 -0000 Hello, I've got 3 1.5TB drives that are using the "Advanced Format" from Western Digital, see the link for details: http://www.wdc.com/wdproducts/library/WhitePapers/ENG/2579-771430.pdf This "Advanced Format" basically means the sectors size on disk is changed to 4k in stead of 512k. I'm wondering if freeBSD 8.0 using ZFS raidz and drives like these will work properly, I've seen a lot of articles and postings about partitions not being properly aligned with the physical disk layout and suffering big performance hits. My question is; should I worry about these issues or does ZFS already align the data on a 4k border? My setup would be 3 * 1.5TB WD drives (WD15EARS) using the whole drive for a raidz pool. Thanks, Rob Evers ***deze e-mail is gescand door Onlinespamfilter.nl***