Attaching attaching The volume is attaching to an instance.

Available available The volume is ready to attach to an instance.

Creating creating The volume is being created.

Deleting deleting The volume is being deleted.

Detaching detaching The volume is detaching from an instance.

Error error cases: error A volume creation error occurred.

Unknown possible cases backing-up The volume is being backed up.

Used in-use The volume is attached to an instance.

Enum represents the state of a host.