1 lsextpool
2?  -dev storage_image_ID
3? 
3  -s
3  -l
4?  -stgtype
4.1 fb
4.1 ckd
5?  -rankgrp
5.1 0
5.1 1
6? 
6 extentpool_ID
6.1? . . .
6 " - "