The Synology RackStation RS4021xs+ is a 3U rackmount NAS built for high-throughput enterprise tasks like virtualization and surveillance. Driven by an Intel Xeon 8-core CPU and 16GB ECC RAM, it achieves speeds up to 6,258 MB/s sequential read. This 16-bay unit features dual 10GbE ports, redundant power, and is expandable to 40 bays. With two PCIe slots for 10/25GbE NICs or NVMe SSD cache, it optimizes performance for demanding workloads. Running on DSM with the Btrfs file system, it ensures data integrity through High Availability and advanced snapshot technology.