Home > Storage > PowerVault > Guides > Dell PowerVault ME5 Series: VMware vSphere Best Practices > Enhancing performance with minimal SSDs
While the cost of SSDs continues to drop, there is still a significant price gap between SSDs and traditional spinning HDDs. Not all environments require the performance of an all-flash array. Both the automated tiered storage and read SSD cache features of the PowerVault ME5 arrays can use a small number of SSDs. This use can provide a significant performance boost to a traditional low-cost, all-HDD SAN solution.