text: **Point-in-time copy**
  A point-in-time copy is an instantaneous copy that the FlashCopy service makes of the source 
  volume. See also “FlashCopy service” on page 777. 
  
  **Preparing phase**
  Before you start the FlashCopy process, you must prepare a FlashCopy mapping. The 
  preparing phase flushes a volume’s data from cache in preparation for the FlashCopy 
  operation. 
  
  **Primary volume**
  In a stand-alone Metro Mirror or Global Mirror relationship, the target of write operations that 
  are issued by the host application. 
  
  **Private fabric**
  Configure one SAN per fabric so that it is dedicated for node-to-node communication. This 
  SAN is referred to as a private SAN. 
  
  **Provisioned capacity**
  See “Capacity” on page 771. 
  
  **Public fabric**
  Configure one SAN per fabric so that it is dedicated for host attachment, storage system 
  attachment, and remote copy operations. This SAN is referred to as a public SAN. You can 
  configure the public SAN to allow Storwize V7000 node-to-node communication also. You can 
  optionally use the -**localportfcmask**parameter of the**chsystem**command to constrain the 
  node-to-node communication to use only the private SAN. 