From owner-freebsd-fs@FreeBSD.ORG Sun Mar 28 17:53:55 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 D5A801065677 for ; Sun, 28 Mar 2010 17:53:55 +0000 (UTC) (envelope-from me@lexasoft.ru) Received: from relay.wahome.ru (relay.wahome.ru [95.211.21.141]) by mx1.freebsd.org (Postfix) with ESMTP id 978958FC16 for ; Sun, 28 Mar 2010 17:53:55 +0000 (UTC) Received: from mmx.lexasoft.ru (mmx.lexasoft.ru [92.241.160.6]) by relay.wahome.ru (Postfix) with ESMTP id A9C366B210B; Sun, 28 Mar 2010 21:51:03 +0400 (MSD) Received: from [192.168.40.138] (unknown [124.157.205.118]) by mmx.lexasoft.ru (Postfix) with ESMTPSA id 1252D28490; Sun, 28 Mar 2010 21:53:50 +0400 (MSD) Mime-Version: 1.0 (Apple Message framework v1077) Content-Type: text/plain; charset=utf-8 From: Alexey Tarasov In-Reply-To: <786602c61003280949s15782d2bh82e2f8dd33a31d88@mail.gmail.com> Date: Sun, 28 Mar 2010 21:53:44 +0400 Content-Transfer-Encoding: quoted-printable Message-Id: References: <492FB7C5-1B48-46BA-B63F-E7CBF7A0A195@lexasoft.ru> <786602c61003280949s15782d2bh82e2f8dd33a31d88@mail.gmail.com> To: Thomas Zander X-Mailer: Apple Mail (2.1077) 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: Sun, 28 Mar 2010 17:53:55 -0000 On 28.03.2010, at 20:49, Thomas Zander wrote: > On Sun, Mar 28, 2010 at 15:03, Alexey Tarasov wrote: >> According to mailing lists, these drives can't be configured to = present 4k sectors to OS. >=20 > Maybe that's a dumb idea, but I am curious. > As far as I understand, the following points apply: > - EARS and RAIDZ is slow, but > - if you make ZFS aware of the 4k sector size (gnop), performance is = okay >=20 > If so, what happens if you configure geli for the whole drive with 4k > sectors? Maybe you get AES-128 for free :-) What do you mean "for free"? =3D) -- Alexey Tarasov (\__/)=20 (=3D'.'=3D)=20 E[: | | | | :]=D0=97=20 (")_(")