Synology RackStation 16 Bay Enterprise NAS Intel Xeon 8 Core 16GB ECC DDR4 – RS4021XS+

Elite Enterprise Storage for Data-Intensive Applications

The Synology RackStation RS4021xs+ is a powerhouse 3U rackmount NAS solution meticulously engineered to meet the demands of large-scale enterprise environments. Driven by an 8-core Intel Xeon D-1541 processor and 16 GB of ECC DDR4 memory, it delivers exceptional performance including over 234,000 4K random read IOPS and a staggering 6,258 MB/s sequential read throughput. This high-performance architecture makes it the ideal choice for businesses managing multi-user environments, complex virtualization projects, and massive data sets that require low latency and high bandwidth.

Engineered for Unmatched Service Continuity

Reliability is at the heart of the RS4021xs+ design. To ensure that mission-critical data remains accessible even during hardware anomalies, this system features built-in redundancy across its core components. Dual power supply units protect against electrical failure or accidental disconnection, while the hot-swappable system fans allow for seamless maintenance without any system downtime. When paired with Synology High Availability (SHA), businesses can create an active-passive cluster that guarantees minute-level failover, providing ultimate peace of mind for 24/7 operations and service delivery.

Advanced Scalability and Customization

As your data footprint grows, the RS4021xs+ adapts to your needs. While the base unit features 16 high-speed drive bays, it can be easily expanded to support up to 40 bays using two Synology RX1217 or RX1217RP expansion units. For businesses requiring specialized networking or storage performance, the dual PCIe Gen3 slots allow for the installation of 10GbE or 25GbE network interface cards, as well as M.2 NVMe SSD adapter cards for high-speed caching. This flexibility ensures that your storage infrastructure can evolve alongside your business technology requirements without the need for a full system replacement.

Comprehensive Backup and Virtualization Ready

Beyond simple storage, the RS4021xs+ serves as a complete data management hub. It supports the next-generation Btrfs file system, which utilizes advanced snapshots and metadata integrity to prevent data corruption. The included Active Backup Suite allows IT administrators to centralize backups for Windows and Linux servers, virtual machines, and cloud accounts like Microsoft 365 and Google Workspace—all without license fees. Furthermore, the unit is fully certified for mainstream virtualization solutions, including VMware vSphere, Microsoft Hyper-V, and OpenStack, transforming the NAS into a powerful and versatile block-based storage component for modern server infrastructures.