text: When considering performance for a system, always identify the bottleneck and, therefore, 
  the limiting factor of a specific system. This is a multidimensional analysis that needs to be 
  performed for each of your workload patterns. There can be different bottleneck components 
  for different workloads. 
  
  When you are designing a storage infrastructure with the Storwize V7000 or implementing a 
  Storwize V7000 in an existing storage infrastructure, you must ensure that the performance 
  and capacity of the SAN, back-end disk subsystems, and Storwize V7000 meets 
  requirements for the set of known or expected workloads. 
  
  **3.19.1 SAN**
  
  The following Storwize V7000 models are supported for V8.2.1: 
  
  (cid:2) Control enclosures: 
  
  – 2076-524 
  – 2076-624 
  
  (cid:2) Expansion enclosures: 
  
  – 2076-12F 
  – 2076-24F 