From owner-freebsd-fs@FreeBSD.ORG Wed Apr 23 14:18:08 2014 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id E5AE4A2F for ; Wed, 23 Apr 2014 14:18:08 +0000 (UTC) Received: from mail.iXsystems.com (newknight.ixsystems.com [206.40.55.70]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id C6BF61BAE for ; Wed, 23 Apr 2014 14:18:08 +0000 (UTC) Received: from localhost (mail.ixsystems.com [10.2.55.1]) by mail.iXsystems.com (Postfix) with ESMTP id B6B397402F; Wed, 23 Apr 2014 07:18:07 -0700 (PDT) Received: from mail.iXsystems.com ([10.2.55.1]) by localhost (mail.ixsystems.com [10.2.55.1]) (maiad, port 10024) with ESMTP id 29010-01-9; Wed, 23 Apr 2014 07:18:07 -0700 (PDT) Received: from [10.8.0.14] (unknown [10.8.0.14]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by mail.iXsystems.com (Postfix) with ESMTPSA id 682D274F9E; Wed, 23 Apr 2014 07:16:23 -0700 (PDT) Content-Type: text/plain; charset=windows-1252 Mime-Version: 1.0 (Mac OS X Mail 7.2 \(1874\)) Subject: Re: ZFS unable to import pool From: Jordan Hubbard In-Reply-To: <72E79259-3DB1-48B7-8E5E-19CC2145A464@icloud.com> Date: Wed, 23 Apr 2014 19:15:56 +0500 Content-Transfer-Encoding: quoted-printable Message-Id: <888649C4-CC66-48A6-9901-BEA93D1BBFA3@mail.turbofuzz.com> References: <20140423064203.GD2830@sludge.elizium.za.net> <20140423080056.GE2830@sludge.elizium.za.net> <20140423091852.GH2830@sludge.elizium.za.net> <20140423100126.GJ2830@sludge.elizium.za.net> <5357937D.4080302@gmail.com> <72E79259-3DB1-48B7-8E5E-19CC2145A464@icloud.com> To: Gena Guchin X-Mailer: Apple Mail (2.1874) Cc: freebsd-fs@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 Apr 2014 14:18:09 -0000 If you added a single disk to a pool, you have no choice but to destroy = the pool and start over. The single disk will essentially degrade the = performance of the whole pool, because it represents a unique = (100Mb/sec, typical) transaction group now, and if you lose that one = disk you will also lose the entire pool since it has no redundancy. This is a common mistake people make with ZFS, and it sucks, but block = pointer rewrite was never implemented so that=92s just the way it is, = too. That=92s another reason for FreeBSD-based front-ends to ZFS like = FreeNAS. The GUI adds some seat-belts to prevent users from trivially = doing things like that. On the command line, all bets are off. - Jordan On Apr 23, 2014, at 7:09 PM, Gena Guchin wrote: > Looking though the history, i DID add that disk ada7 (!) to the pool, = but I added it as a separate disk. I wanted to re-add the disk to the = storage pool, but it added as a new disk=85 > this does help a lille.. >=20 >=20 > anything I can do now?=20 > can I remove that vdev?