
Chapter 3. Logical configuration concepts and terminology 81
Figure 3-8 Single-tier extent pool with multiple ranks
Multi-tier extent pools
A multi-tier or hybrid extent pool is formed by combining ranks of different storage classes or
different storage tiers within the same extent pool. Hybrid pools are always supposed to be
managed by Easy Tier automatic mode, which provides automated storage performance and
storage economics management. It provides full automated cross-tier and intra-tier
management by dynamically relocating subvolume data (at the extent level) to the appropriate
rank and storage tier within an extent pool based on its access ...