From owner-freebsd-questions@FreeBSD.ORG Thu May 26 14:28:49 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 51A511065670 for ; Thu, 26 May 2011 14:28:49 +0000 (UTC) (envelope-from icemaca@gmail.com) Received: from mail-ww0-f50.google.com (mail-ww0-f50.google.com [74.125.82.50]) by mx1.freebsd.org (Postfix) with ESMTP id CD73F8FC0C for ; Thu, 26 May 2011 14:28:48 +0000 (UTC) Received: by wwc33 with SMTP id 33so775049wwc.31 for ; Thu, 26 May 2011 07:28:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:message-id:from:to:subject:date:mime-version :content-type:x-priority:x-msmail-priority:importance:x-mailer :x-mimeole; bh=ffQAcPC2z8ynD78YQaT48TMe6qxaf1GEGvB3YUdNYXc=; b=kuleJ4xNMn5RlksKfrr4L4EMR6xzxad6MGmFLbi+3ifzDyKVVnUnsjJcK6usWUM5D2 eQUTYC9tELpL/bM3jcvnBkH9CkKXCkEo8PmWR2DBaBuBlfQs4id5VHEXtxgA3oagR0Nc WZp9nn+re/023yzaNkuw1yJMk4EINq+4mwEWI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:from:to:subject:date:mime-version:content-type :x-priority:x-msmail-priority:importance:x-mailer:x-mimeole; b=PTqvgFq4ZuiLmmQSGGAMQhI4cy3SBAXhNqpgOLLuE/e3wzIesP4VCZHUiupqrAQuP9 rmuqeDZ89Rzr8P7DCA2WnABqyAPEALmlhoV5RaUDqQgzZ8zJx8WbWhLGdMPGNjSseT8f 7yq0kOfFX9cIvuZpu55fzZeMuUUMUtxVuHbeI= Received: by 10.216.59.81 with SMTP id r59mr876447wec.40.1306418486877; Thu, 26 May 2011 07:01:26 -0700 (PDT) Received: from Win64 (c68-16.i05-18.onvol.net [88.203.68.16]) by mx.google.com with ESMTPS id z22sm390492weq.26.2011.05.26.07.01.24 (version=SSLv3 cipher=OTHER); Thu, 26 May 2011 07:01:25 -0700 (PDT) Message-ID: <1D75DCBBE6B04871AFD1EDD455CBA7B6@Win64> From: "icema" To: Date: Thu, 26 May 2011 15:59:00 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3508.1109 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3508.1109 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: zfs newbie question X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 May 2011 14:28:49 -0000 hi, i have a new fbsd-8.2 install (dual boot with win7, just desktop general = use) on entirely ufs disk, and am not=20 sure how to mount a zfs formatted disk from a previous install, without = loosing what is on there. (freebsd-zfs). in short, the zfs disk was from a previous freebsd install, same = version, just needed to wipe/reinstall, which was also entirely ufs. To try out zfs i used a full separate disk, partiitoned = and setup as freebsd-zfs through gpt, then created=20 the pool specifying it. i.e =20 zpool create foo /dev/ad10. atm i dont have a pool at all and dont know if i use that command, if it = will simple create one and mount ad10,=20 retaining the data on it or whether that will just reinitialise, wiping = the data in the process. to avoid surprises, i have been looking around to see if u can create an = empty pool (without specifying disk space or w/e), then try the =E2=80=98add=E2=80=99 command instead, to add it there, but = i dont see that thats possible so far; and i dont have spare space=20 to use in creating a new pool. so, is it entirely safe to use zpool create foo /dev/ad10 to mount it = and retain data, or is there some way to create an empty pool? thanks in advance