SSD (Solid State Disk) technology can increase the amount of IOPS you can deliver per GB of storage. This leads to less space and power consumed per IO. While you have an application that can support 300 mechanical drives, at today’s drive capacities that can lead to TB’s of unused space. In NAS IO a viable alternative is beginning to be presented by companies like Storspeed. This allows SSD to be used to its maximum capacity and yet always have the most active data set on that high speed tier.”]
Source: https://www.darkreading.com/database-security/maximizing-iops-with-ssd