Nearly every storage manufacturer has been articulating a solid state disk (SSD) strategy in the past two quarters. EMC NetApp, and Compellent are all set to add the capability to their offering. In storage terms it is the amount of time between a request being made and that request being fulfilled. In the past it had all been about the speed of the drives, so the focus became making the drives faster by using higher RPM drives, array groups with a high drive count, short-stroking those drives, and increasing the number of application servers for improved parallelism.”]
Source: https://www.darkreading.com/database-security/ssds-are-all-about-latency