How to delete old cinder volume after changing the storage backend ?

I have found the below very useful article in which it’s mentioned that how can we delete the old volumes which are created with different backend after changing to new backend.

http://www.dischord.org/2015/12/22/cinder-multi-backend-with-multiple-ceph-pools/

Key takeaways:

  • Need to change the “attached_host" parameter in two tables volumes, volume_attachment present in cinder DB.
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