text: IBM Storwize V7000 supports spinning disks and flash drives. When different tiers are used, 
  the IBM Storwize V7000 uses IBM Easy Tier to automatically place volume hot spots on 
  better-performing storage. Even without the Easy Tier enabled, the Storage Pool balancing is 
  available and enabled by default to equally distribute workload equally across all MDisks in 
  that tier. 
  
  **19** Chapter 2. System overview 