From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id m04Ihl3w031035 for ; Fri, 4 Jan 2008 13:43:47 -0500 Received: from mailgw.soe.ucsc.edu (mailgw.cse.ucsc.edu [128.114.48.9]) by mx3.redhat.com (8.13.1/8.13.1) with ESMTP id m04Ih1m6011515 for ; Fri, 4 Jan 2008 13:43:01 -0500 Received: from [128.114.56.35] (wraith.cse.ucsc.edu [128.114.56.35]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mailgw.soe.ucsc.edu (Spam Firewall) with ESMTP id 0614B423DB8 for ; Fri, 4 Jan 2008 10:42:59 -0800 (PST) Message-ID: <477E7E31.6080500@soe.ucsc.edu> Date: Fri, 04 Jan 2008 10:42:57 -0800 From: Erich Weiler MIME-Version: 1.0 Subject: Re: [linux-lvm] How to 'copy' a volume? References: In-Reply-To: Content-Transfer-Encoding: 7bit Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: LVM general discussion and development Stuart D. Gathman wrote: >> The machine then had a kernel panic (I think). I'm remote so I'm not >> sure, but I'll be going in soon to check on it. Not a critical system >> so no big deal. I'll let everyone one what I see at the console. > > Could be very slow. On one of my systems, a blocksize of 300k is optimal. > The default block size is usually 512 bytes. > > # dd if=/dev/volgroup00/original of=/dev/volgroup00/clone bs=300k It was probably slow, as you say, but it turns out our machines were powered off by one of the other guys in our group because the UPS was draining fast. Power was lost because of a major storm on the central California coast. I have a feeling it was working but was interrupted. I'll try again when power is restored... Thanks so much for your input! -erich