text: Figure 2-6 Separation of upper and lower cache 
  
  The upper cache provides the following functionality, which enables the system to streamline 
  data write performance: 
  
  (cid:2) Fast write response times to the host by being as high up in the I/O stack as possible 
  (cid:2) Partitioning 
  
  **21** Chapter 2. System overview 