RackStation RS2821RP+ High-performance storage for data protection, file serving, and more. Synology RS2821RP+ is a 3U 16-bay storage server designed to accommodate a diverse set of business requirements. Scalable to 28 drives, the unit provides powerful backup and restoration functionality for the SMB sector. It delivers 2,200 MB/s sequential read and 105K 4K random read performance1, and can be upgraded with SSD cache and 10/25Gb Ethernet2 options.