From owner-freebsd-hackers@FreeBSD.ORG Mon Jun 1 12:19:57 2009 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 777C4106566C for ; Mon, 1 Jun 2009 12:19:57 +0000 (UTC) (envelope-from kraduk@googlemail.com) Received: from mail-ew0-f212.google.com (mail-ew0-f212.google.com [209.85.219.212]) by mx1.freebsd.org (Postfix) with ESMTP id EB6938FC14 for ; Mon, 1 Jun 2009 12:19:56 +0000 (UTC) (envelope-from kraduk@googlemail.com) Received: by ewy8 with SMTP id 8so4303942ewy.43 for ; Mon, 01 Jun 2009 05:19:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:received:received:from:to:cc:references:subject :date:message-id:mime-version:content-type:content-transfer-encoding :x-mailer:in-reply-to:x-mimeole:thread-index; bh=ilhk9GB0RtqepHCimX4qA7CSrJ1E+EvtbaEspyPlU9k=; b=DFHgqWXRHVngzV9dEPyfbfTsOo1YxURqp1tc8y0wntf3gxG/OKM1lxBnLU2Fzw8Muh WGmwB2DIbTiJX897YT4jX/BJCxRezRVtzGOSkRv5Qmo+YMSVCvwT1TcaNat3RfdBcm6m oqz0wg+xa8H1OApw51+j815BvDwPKntHCqdtk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=from:to:cc:references:subject:date:message-id:mime-version :content-type:content-transfer-encoding:x-mailer:in-reply-to :x-mimeole:thread-index; b=X9ftRhIZLHaUzGoIxK1BvlLMu70nh/U1l4HQ57a19TGHuY1gzrHxpamM20N2zN672S w9/8GqkwXuHUoAXajUn0D+CIAD4STfQPJ0M5PC7vhia109Kso3py7PLZjybF22+KUD63 5sKA+R4SxXL9V9i3wUJ8M+VOUMSu3oMeqelVY= Received: by 10.210.131.6 with SMTP id e6mr3927776ebd.81.1243858795847; Mon, 01 Jun 2009 05:19:55 -0700 (PDT) Received: from LTPCSCOTT (e1-1.ns500-1.ts.milt.as9105.net [212.74.112.53]) by mx.google.com with ESMTPS id 4sm6947954ewy.32.2009.06.01.05.19.55 (version=SSLv3 cipher=RC4-MD5); Mon, 01 Jun 2009 05:19:55 -0700 (PDT) From: krad To: "'Wojciech Puchar'" , "'krad'" References: <20090530175239.GA25604@logik.internal.network><20090530144354.2255f722@bhuda.mired.org><20090530191840.GA68514@logik.internal.network><20090530162744.5d77e9d1@bhuda.mired.org><20090531201445.GA82420@logik.internal.network><0229B3BF1BE94C82AA11FD06CBE0BDEF@uk.tiscali.intl><20090531235943.GA77374@logik.internal.network><20090531201408.45dd4334@bhuda.mired.org> <442651299CA2445991E65F64AF9E65D7@uk.tiscali.intl> Date: Mon, 1 Jun 2009 13:19:54 +0100 Message-ID: <3ED3189838484C8FBDECE5478A0DDFF4@uk.tiscali.intl> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook 11 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Thread-Index: AcnimA5TGTgMqrM0S+WAuk0AOmAcJQAGsYng X-Mailman-Approved-At: Mon, 01 Jun 2009 13:24:05 +0000 Cc: freebsd-hackers@freebsd.org, 'Mike Meyer' , xorquewasp@googlemail.com Subject: RE: Request for opinions - gvinum or ccd? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 01 Jun 2009 12:19:57 -0000 Its all done on write, so if you update the file it will have multiple copies again This explains it quite well http://blogs.sun.com/relling/entry/zfs_copies_and_data_protection -----Original Message----- From: Wojciech Puchar [mailto:wojtek@wojtek.tensor.gdynia.pl] Sent: 01 June 2009 10:05 To: krad Cc: 'Mike Meyer'; freebsd-hackers@freebsd.org; xorquewasp@googlemail.com Subject: RE: Request for opinions - gvinum or ccd? > You shouldn't need to alter the copies attribute to recover from disk > failures as the normal raid should take care of that. What the copies is I don't think we understand each other. I say that when i want 2 copies, ZFS should rebuild second copy if it's gone and i run resilver. it does not, what doesn't make sense for me.