Compact and scalable optimal performance for smb rs815 is a scalable 1u 4 bay rackmount nas built to help businesses effectively store protect and share data rich enterprise features and stability are packed into the compact hardware design making it ideal for growing small businesses with limited space or budget 12 inch depth for ultra dense installation introducing a shallow 12 inch chassis design 37 shorter than its predecessor rs815 can be deployed with as compact as a 2 post ra