text: **Note:**Consider the following points: 
  
  (cid:2) A*Basic volume*is a volume that has only one physical copy, uses storage that is 
  allocated from a single pool on one site, and uses read/write cache mode. 
  
  (cid:2) A*Mirrored volume*is a volume with two physical copies, where each volume copy can 
  belong to a different storage pool. 
  
  (cid:2) A*Custom volume*(in the context of this menu) is a Basic or Mirrored volume with values 
  of some of its parameters that are changed from the defaults. 
  
  (cid:2) The Create Volumes window also provides (by way of the Capacity Savings parameter) 
  
  the ability to change the default provisioning of a Basic or Mirrored Volume to 
  Thin-provisioned or Compressed. For more information, see 7.2.3, “Capacity savings 
  option” on page 265. 