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On 00:31 Tue 20 Jan     , Nikesh Kumar Mahalka wrote:
> do cinder retype (v2) works for lvm?
> How to use cinder retype?

In the future, please have your subject prefixed with [cinder].

> I tried for volume migration from one volume-type LVM backend to
> another volume-type LVM backend.But its failed.
> How can i acheive this?

Please provide your cinder-api, cinder-vol, and cinder-scheduler service logs.
You can paste things to http://paste.openstack.org

-- 
Mike Perez