From owner-freebsd-fs@FreeBSD.ORG Tue Sep 18 13:25:38 2012 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 8BF6F1065674; Tue, 18 Sep 2012 13:25:38 +0000 (UTC) (envelope-from c.kworr@gmail.com) Received: from mail-ee0-f54.google.com (mail-ee0-f54.google.com [74.125.83.54]) by mx1.freebsd.org (Postfix) with ESMTP id E020D8FC1C; Tue, 18 Sep 2012 13:25:37 +0000 (UTC) Received: by eeke52 with SMTP id e52so4170581eek.13 for ; Tue, 18 Sep 2012 06:25:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=gApzxRvsz0CRRU3haEdzzrw0frra1yMDOAJsEquEGeo=; b=qFwGWTwYsvS5QKhV7ZFkfRgfQoAjCAlKmPTr3KwN5bmiQKtSJMKBRDQgOPGAqIem7q stJkdOqtpnrgpFhtdGrQy5ihG4vZUqpM6NR2qrSxQtEvHgOYPQlUJUVt+IjlC6IpaSlA 2s23N3SvzhgjSlAb9hRzICqgnsH43kcv0KoDIKsEJ/2Qcw5BIA3s/gKmFaMyr0cb1LWO bjPZ1kMrwQnQvly394RcBz3dn9VwMEq2oPCpQX3NnLL6ODb/0HWfBNOgeTyiMixWFOkv btlHnoiTDB1/RcphrM4lpshmwDHVVIsQGvwKcFNQwf/CDGXxQ8qBVOCLD+By37F5LsDM OfgQ== Received: by 10.14.224.4 with SMTP id w4mr199891eep.21.1347974736902; Tue, 18 Sep 2012 06:25:36 -0700 (PDT) Received: from green.local (90-224-132-95.pool.ukrtel.net. [95.132.224.90]) by mx.google.com with ESMTPS id k49sm36338835een.4.2012.09.18.06.25.34 (version=SSLv3 cipher=OTHER); Tue, 18 Sep 2012 06:25:35 -0700 (PDT) Message-ID: <5058764D.1010403@gmail.com> Date: Tue, 18 Sep 2012 16:25:33 +0300 From: Volodymyr Kostyrko User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:15.0) Gecko/20120911 Thunderbird/15.0.1 MIME-Version: 1.0 To: Gary Palmer References: <000001cd9239$ed734c80$c859e580$@goelli.de> <5052EC5D.4060403@gmail.com> <000a01cd9274$0aa0bba0$1fe232e0$@goelli.de> <505322C9.70200@gmail.com> <000001cd9377$e9e9b010$bdbd1030$@goelli.de> <50559CD8.1070700@gmail.com> <000001cd94f1$a4157030$ec405090$@goelli.de> <50581033.4040102@gmail.com> <20120918112355.GB77784@in-addr.com> <50586B99.40108@gmail.com> <20120918131441.GC77784@in-addr.com> In-Reply-To: <20120918131441.GC77784@in-addr.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-fs@freebsd.org Subject: Re: AW: AW: AW: AW: AW: ZFS: Corrupted pool metadata after adding vdev to a pool - no opportunity to rescue data from healthy vdevs? Remove a vdev? Rewrite metadata? 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: Tue, 18 Sep 2012 13:25:38 -0000 18.09.2012 16:14, Gary Palmer wrote: >> Please understand me correctly, this is only my point of view on the >> problem as I never saw any tests that show difference between correct >> alignment of _partitions_ and alignment on _records_ on ZFS. This area >> is not thoroughly covered with test data. > > I seem to recall that people made 4 kilobyte aligned partitions on > advanced format drives without doing the gnop trick and still > suffered worse performance than when they did the gnop trick to make > ashift=12. Check the list archives. > > If you believe there is insufficient testing here and are saying that > conventional wisdom regarding this is wrong, it is resonable to request > that you prove your position. I have one of the first 4k drives yet it's not yet available for testing. I'm planning to rerun tests on it when it will be available. -- Sphinx of black quartz judge my vow.