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 (8.11.6/8.11.6) with ESMTP id jAC7bkV31348 for ; Sat, 12 Nov 2005 02:37:46 -0500 Received: from nproxy.gmail.com (nproxy.gmail.com [64.233.182.198]) by mx3.redhat.com (8.13.1/8.13.1) with ESMTP id jAC7betT025688 for ; Sat, 12 Nov 2005 02:37:40 -0500 Received: by nproxy.gmail.com with SMTP id k26so185723nfc for ; Fri, 11 Nov 2005 23:37:39 -0800 (PST) Message-ID: <62b0912f0511112337q7d94fe1ajd48941d8391af28d@mail.gmail.com> Date: Sat, 12 Nov 2005 07:37:39 +0000 From: Molle Bestefich In-Reply-To: <62b0912f0511110516gf83b91eta2098d137f456d51@mail.gmail.com> MIME-Version: 1.0 Content-Disposition: inline References: <62b0912f0511110516gf83b91eta2098d137f456d51@mail.gmail.com> Content-Transfer-Encoding: 8bit Subject: [linux-lvm] Fwd: LVM snapshots: guess *that's* not how it's done 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" To: linux-lvm@redhat.com Moderator requested 83kB of screenshots be scrapped. Now it is. (It's still in this original mail in the dm-devel archives. ---------- Forwarded message ---------- From: Molle Bestefich Date: Fri, 11 Nov 2005 14:16:22 +0100 Subject: LVM snapshots: guess *that's* not how it's done To: dm-devel@redhat.com, linux-lvm@redhat.com Good day, I just bought a shiny big new box. Contemplating using Xen + dm snapshots + unionfs + nbd to do various fun things with it. Since Fedora Core 4 has a couple of those things already in the distro, I went with that. I did this: 1. Install Fedora Core 4 2. Create a snapshot of the root volume with lvcreate Seems the snapshotting did not go after plan - see attached screenshot.... Is that a serious bug in device-mapper or lvm, or is it just me that's doing something wrong? After the lvcreate, nothing works. A couple things like 'df' does, but otherwise there's dialogs complaining about missing ELF headers and non-executable binary files no matter what I click or try to run. This is the disk layout: 2x300GB SATA with 3 MD RAID1 partitions: md0: 512MB ext3 --> /boot md1: 8GB swap md2: 250GB LVM --> VolGroup0 Dom0Vol: 20GB ext3 LV on VolGroup0 FC4_Install: 10GB snapshot LV of Dom0Vol Both disks were burn-in tested twice before starting.