From owner-freebsd-fs@FreeBSD.ORG Mon Mar 29 07:36:59 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 2397C1065672 for ; Mon, 29 Mar 2010 07:36:59 +0000 (UTC) (envelope-from numisemis@yahoo.com) Received: from web112420.mail.gq1.yahoo.com (web112420.mail.gq1.yahoo.com [98.137.26.117]) by mx1.freebsd.org (Postfix) with SMTP id E72DB8FC17 for ; Mon, 29 Mar 2010 07:36:58 +0000 (UTC) Received: (qmail 20555 invoked by uid 60001); 29 Mar 2010 07:36:58 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1269848218; bh=qbI7fzkrSGs5bnL6uB0qD7BXNwCRwHvt/6WveDaKHMQ=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type; b=nFjfOslkrLjjNuKnzEMRNCzhuIxNzSx1PxY+ILZ4/pizBfclItsUXna7NgSyiWLkSIWoptZCsOlBbBoibcB3j6Ves8KQ0djpSEMPQM7xazemvihZU7PyWusKSJZJp5WcQcO/yVgZz0EVmZhRdjGp9kVttLGrPt84d8l5jsyclqo= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type; b=MlthcyGZffTYhtTLEX2TnvOJrBSw/7542RoCjpkXW6EGD+zjZSQX+S8J6OBn17FsAjBMBhKEBjDsSny1xVn13huwEdktzTH0a8VYvYxz1a9V4QByf6vAZIj6SajJPV3LLPYB/HQ4m5IF/doKuFEbk2IjZMU5uTwKKcoC3/3iOt4=; Message-ID: <641044.19603.qm@web112420.mail.gq1.yahoo.com> X-YMail-OSG: _xJI6SQVM1nCYu41EcgSuJ9KDzIR96TyuTobA3petgMF4I3 eUNmuMOOjfoSCcIV.bvTHGo50d_eDmqvWynEpQyVfAleTLG2PQYtg5SurdXi LhH9HAAN9U5JnCOaGhjYorFZfj5gB_Kufohz_yAf6QRLEicEqivt_9PnMkhK .vkGSxdIhAKA8mjEDkvqBc0aJRVgfhA4yiQwt41JVDYiIhQBvvR0b3mulv7v xjjl4Q6b5g0f0XOA.C.p9CPXGZBnqveN53IAVN4BTCdnLRTSzIcJznIacN43 YGvUgZ1A43NGfAKKVPvmhD4vPIQdoV9DZr._oJfJGTcqjmaLbZsdGsquBvGr l1hhFEd7hw1dnvke9433QO3.vEFgYRg-- Received: from [213.147.110.159] by web112420.mail.gq1.yahoo.com via HTTP; Mon, 29 Mar 2010 00:36:58 PDT X-Mailer: YahooMailRC/324.3 YahooMailWebService/0.8.100.260964 References: <492FB7C5-1B48-46BA-B63F-E7CBF7A0A195@lexasoft.ru> Date: Mon, 29 Mar 2010 00:36:58 -0700 (PDT) From: Simun Mikecin To: Alexey Tarasov In-Reply-To: <492FB7C5-1B48-46BA-B63F-E7CBF7A0A195@lexasoft.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: freebsd-fs@freebsd.org Subject: Re: ZFS raidz and 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: Mon, 29 Mar 2010 07:36:59 -0000 ----- Original Message ---- > From: Alexey Tarasov > To: Ivan Voras ; freebsd-fs@freebsd.org > Sent: Sun, March 28, 2010 3:03:38 PM > Subject: Re: ZFS raidz and 4k sector disks > > According to mailing lists, these drives can't be configured to present 4k > sectors to OS. Emulation jumper only changes first LBA number to 1 to made > WinXP start first partition from 64 sector (63+1). May be fresh firmware > update can solve this problem. I don't think they will ever come with a firmware update like that because WD has major operating systems (like Windows 7) covered. It could be solved by asking the drive what is the size of a sector (such ATA call exists: see http://www.wdc.com/wdproducts/library/WhitePapers/ENG/2579-771430.pdf) and set the sector size of the device (/dev/[a]da*) as needed . That would be a permanent solution for ZFS, UFS, swap or any other consumer of this device.