text: Consider the following points about the storage migration process: 
  
  (cid:2) Typically, storage systems divide storage into many Small Computer System Interface LUs 
  that are presented to hosts. 
  
  (cid:2) I/O to the LUs must be stopped and changes made to the mapping of the external storage 
  system LUs and to the fabric configuration so that the original LUs are presented directly 
  to the Storwize V7000 and not to the hosts anymore. The Storwize V7000 discovers the 
  external LUs as*unmanaged*MDisks. 
  
  (cid:2) The unmanaged MDisks are*imported*to the Storwize V7000 as*image-mode volumes*and 
  placed into a temporary storage pool. This storage pool is now a logical container for the 
  LUs. 
  
  (cid:2) Each MDisk has a one-to-one mapping with an image-mode volume. From a data 
  
  perspective, the image-mode volumes represent the LUs exactly as they were before the 
  import operation. The image-mode volumes are on the same physical drives of the 
  external storage system and the data remains unchanged. The Storwize V7000 is 
  presenting active images of the LUs and is acting as a proxy. 