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xen-users
Re: [Xen-users] Mounting an image with loopback that contains an LVM
On Thu, 6 Nov 2008, Ian Murray wrote:
I have Ubuntu 8.04 Dom0 and CentOS 5.2 DomU. I want to be able to mount the
image file of the CentOS DomU in the Ubuntu Dom0 to copy some stuff onto it.
I figured I could do it this way...
Make sure DomU was destroyed.
losetup /dev/loop1 /xen/test/test.img
now you can use kpartx tool
kpartx -a /dev/loop1
it will create the following device nodes
/dev/mapper/loop1p1
/dev/mapper/loop1p2
which you can now access as normal block devices
once finished use
kpartx -d /dev/loop1
using 'p' in fdisk /dev/loop1 gives me what I would expect... two partitions....
/dev/loop1p1 .... Linux
/dev/loop1p2 .... Linux LVM
when I run pvscan, it returns the error "no matching physical volumes found".
When I run pvcan -vvv it appears to look at /dev/loop1 but simply states that
no label is found.
Under LVM on both systems, I did a 'version' command:-
Ubuntu Dom0
LVM 2.02.26 2007-06-15
Lib 1.02.20 2007-06-15
CentOS DomU
LVM 2.02.32-RHEL5 2008-03-04
Lib 1.02.24 2007-12-20
Am I doing something wrong or is the problem with the slight mis-match of
versions?
Thanks in advance,
Ian.
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