Simplified, higher density and more reliable servers make the hyperscale all-flash datacenter more efficient than datacenters based on solidstatedisk and harddisk systems.
The flash cache is used to store frequently accessed data providing the fast data response found in solidstate drives while the harddisk storage provides low cost storage.
Solid-state storage and memory technologies in general use less power than harddisk drives when they are active, and thus there can be power savings if some solid-state storage and memory can be used in a mixed storage technology environment in a way that reduces the spinning time of harddisk drives and thus decreases the power needs of a storage system.