[linux-lvm] how to copy a snapshot, or restore snapshot without deleting it

Zdenek Kabelac zkabelac at redhat.com
Thu Jan 10 09:45:24 UTC 2019

Dne 10. 01. 19 v 7:23 Davis, Matthew napsal(a):
> Hi Marian,
> I'm trying to do it with thin snapshots now. It's all very confusing, and I can't get it to work.
> I've read a lot of the documentation about thin stuff, and it isn't clear what's happening.
> I took a snapshot with
>      sudo lvcreate -s --name mySnap1 centos/root
> Then I copied that snapshot with
>      sudo lvcreate -s --name mySnap2 centos/mySnap1
> When I try to restore mySnap1 it says:
>      $sudo lvconvert --merge centos/mySnap1
>      centos/mySnap1 is not a mergeable logical volume


Aren't you using some quite ancient version of lvm2 ?
You need to use lvm2 which does support thin volume merging



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