>the array algorithm used in today's FASTVP seems to work best in a 2-tier vs a 3-tier strategy   Its unclear what you mean by, "seems to work best".  After all, its not the difference between a two-wheeler and a tricycle. [IMAGE]  There are some advantages to a two-tier pool.  For example, with a two-tiered pool using SAS/NL-SAS and FAST Cache, versus a three-tiered pool with Flash/SAS/NL-SAS.  That is, the FAST Cache can be used globally for any of the storage system's LUNs, and the Flash drives in the three-tier pool benefit only that pool's LUNs.
Hey everyone,  I was recenlty made aware that the array algorithm used in today's FASTVP seems to work best in a 2-tier vs a 3-tier strategy. Does anyone have anymore insight on this?   Joel
2 Tier vs. 3 Tier Storage Pool