text: **2.3.3 IBM Storwize V7000 functions**
  
  The following functions are available with the current release of IBM Spectrum Virtualize: 
  
  (cid:2) Thin provisioning 
  
  Traditional fully allocated volumes allocate real physical disk capacity for an entire volume, 
  even if that capacity is never used. Thin-provisioned volumes allocate real physical disk 
  capacity only when data is written to the logical volume. 
  
  (cid:2) Volume mirroring 
  
  Provides a single volume image to the attached host systems while maintaining pointers to 
  two copies of data in separate storage pools. Copies can be on separate disk storage 
  systems that are being virtualized. If one copy is failing, IBM Storwize V7000 provides 
  continuous data access by redirecting input/output (I/O) to the remaining copy. When the 
  copy becomes available, automatic resynchronization occurs. 
  
  (cid:2) FlashCopy 
  
  Provides a volume level point-in-time copy function for any storage being virtualized by 
  IBM Spectrum Virtualize. This function creates copies for backup, parallel processing, 
  testing, and development, and has the copies available almost immediately. 
  
  IBM Storwize V7000 includes the following IBM FlashCopy functions enabled by IBM 
  Spectrum Virtualize V8.1: 
  
  – Full or incremental copy 
  
  This function copies only the changes from the source or target data since the last 
  FlashCopy operation, and enables completion of point-in-time online backups much 
  more quickly than the use of traditional FlashCopy. 