'Create a zfs volume on appliance.
:param volume: volume reference
:return: model update dict for volume reference'

def create_volume(self, volume):

    url = ('storage/pools/%(pool)s/volumeGroups/%(group)s/volumes' % {'pool': self.storage_pool, 'group': self.volume_group})
    data = {'name': volume['name'], 'volumeSize': (volume['size'] * units.Gi), 'volumeBlockSize': (self.configuration.nexenta_ns5_blocksize * units.Ki), 'sparseVolume': self.configuration.nexenta_sparse}
    self.nef.post(url, data)
