[linux-lvm] How to "clone" a logical volume

Lionel Kernux lionel.kernux at gmail.com
Fri Mar 7 16:06:35 UTC 2008


Thanks for the reply.

I'm talking about LVM uuid...I assumed that it is stored somwhere on
the actual LV...is this not the case? If not, my problem is solved!

So...Just to be sure:

If I dd my source LV to my destination LV (which has alraedy been
created through  lvcreate) then LVM wont care and will activate it and
all will be well?



On Fri, Mar 7, 2008 at 10:44 AM, Tomasz Chmielewski <mangoo at wpkg.org> wrote:
> Lionel Kernux schrieb:
> > Hi,
>  >
>  > Here's what I'm trying to do:
>  >
>  > I have an LV that is being used as a physical disk for a XEN virtual machine.
>  > I want to "clone" the VM.
>  > lvcreate -L 75G -n virtualmachine_clone_lv VG00
>  > dd if=/path/to/virtualmachine_lv of=/path/to/virtualmachine_clone_lvT
>  >
>  > This method would be perfect if it wasn't for the fact that now I have
>  > 2 LV's with the same uuid....not good...
>  What UUID are you talking about here? Filesystem UUID, or LVM UUID?
>  If about LVM UUID, it will not be the same if you dd a LV - UUID is
>  stored somewhere else.
>  Filesystem UUID (if any) will remain the same, of course, as it's the
>  exact copy.
>  --
>  Tomasz Chmielewski
>  http://wpkg.org
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