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[linux-lvm] Fwd: LVM snapshots: guess *that's* not how it's done



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 <molle bestefich gmail com>
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.


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