'Manages an existing vdisk.
Renames the vdisk to match the expected name for the volume.'

def manage_existing(self, volume, existing_ref):

    LOG.debug('enter:    manage_existing:    volume    %(vol)s    ref    %(ref)s.', {'vol': volume, 'ref': existing_ref})
    vdisk = self._manage_input_check(existing_ref)
    new_name = ('volume-' + volume['id'])
    self._rename_vdisk(vdisk['name'], new_name)
    LOG.debug('leave:    manage_existing:    volume    %(vol)s    ref    %(ref)s.', {'vol': volume, 'ref': existing_ref})
    return
