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    • https://kb.netapp.com/Cloud/OpenStack/Openstack%3A_Does_cinder_driver_allow_in-use_volumes_to_be_extended
      Currently, it is not possible to extend the size of a root volume that is attached to a server and uses a NetApp ONTAP backend When attempting to extend a root volume, the following event is seen in C...Currently, it is not possible to extend the size of a root volume that is attached to a server and uses a NetApp ONTAP backend When attempting to extend a root volume, the following event is seen in Cinder scheduler.log: It is possible to extend a in-use root volume by toggling the volume to 'available'. The procedure for doing so is: Refer to this article: Redhat has a solution for this issue documented in "How to extend attached/in-use volume in Openstack? "