From owner-freebsd-fs@FreeBSD.ORG Fri Sep 14 12:27:59 2012 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 9CBA2106566C for ; Fri, 14 Sep 2012 12:27:59 +0000 (UTC) (envelope-from c.kworr@gmail.com) Received: from mail-bk0-f54.google.com (mail-bk0-f54.google.com [209.85.214.54]) by mx1.freebsd.org (Postfix) with ESMTP id 2065A8FC16 for ; Fri, 14 Sep 2012 12:27:58 +0000 (UTC) Received: by bkcje9 with SMTP id je9so1137157bkc.13 for ; Fri, 14 Sep 2012 05:27:57 -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=KW9WICvYC+wXUMCgMu1rm6NKMVe3m8bvNzpCQaX1IXo=; b=xaGqFdDUfObjJuPwUVbmf7h+dLExf6bBvOzICZVKP6kyLj6d6/JDGYTEszpJVcsCVA gTHx9KNHURR4W5xwDfMIsZ4bcklNbDx9Rmbk/s5bxWGX5zmjGMMyagYSTcteZLXHEV64 9qPBJNnc39tJEmybTTIDUnXGHWJF2QwCwGpYqtgUQP6Hd9739/Dy3qjpR2Uv2TKO/x5u NDQrzpgBU6EvC3p4OMKvMBUry4p4XsBHFRq//Vgdz7pDemlQSfVDyxJGn6nxMGEdAo7q /IB8ab+HAE/o+kKLzRB5KzJYU331yOADqVQ899omhwtIoqJ2KsIieWZSjqUMLAseVbpp Zxew== Received: by 10.204.129.14 with SMTP id m14mr1101396bks.7.1347625677503; Fri, 14 Sep 2012 05:27:57 -0700 (PDT) Received: from green.local (155-10-132-95.pool.ukrtel.net. [95.132.10.155]) by mx.google.com with ESMTPS id y20sm991281bkv.11.2012.09.14.05.27.55 (version=SSLv3 cipher=OTHER); Fri, 14 Sep 2012 05:27:56 -0700 (PDT) Message-ID: <505322C9.70200@gmail.com> Date: Fri, 14 Sep 2012 15:27:53 +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: =?UTF-8?B?IlRob21hcyBHw7ZsbG5lciAoTmV3c2xldHRlciki?= References: <001a01cd900d$bcfcc870$36f65950$@goelli.de> <504F282D.8030808@gmail.com> <000a01cd90aa$0a277310$1e765930$@goelli.de> <5050461A.9050608@gmail.com> <000001cd9239$ed734c80$c859e580$@goelli.de> <5052EC5D.4060403@gmail.com> <000a01cd9274$0aa0bba0$1fe232e0$@goelli.de> In-Reply-To: <000a01cd9274$0aa0bba0$1fe232e0$@goelli.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Cc: freebsd-fs@freebsd.org Subject: Re: 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: Fri, 14 Sep 2012 12:27:59 -0000 14.09.2012 15:25, Thomas Göllner (Newsletter) wrote: >> Try reading Max Bruning's blog at http://mbruning.blogspot.com/, there's a good data walk on raidz and raidz on-disk format. > > I'll do that, thanks for pointing me to it. > >>> I also think there is no way to write new or edit the lables of the discs? > > >> This idea is called Block Pointer Rewrite and is not implemented yet. I have found no code to do that. > > I thought it may come to this -.- Because during my last reading I had to learn, that I have to find the "root block pointer" to recover the maybe overwritten labels... As it changes place and content with each copy on write process (each txg?) it will be a search for the needle in the haystack... Not at all, what are you referring to is MOS and the one is contained in each UberBlock. -- Sphinx of black quartz judge my vow.