Synology RS4021xs+ NAS Server with Powerful CPU & SSD Storage

The Synology RackStation RS4021xs+ is a high-performance Network Attached Storage (NAS) server designed for businesses requiring robust data security, scalability, and advanced storage capabilities. It features an Intel Xeon D-1541 8-core processor operating at a base frequency of 2.1GHz with a turbo boost capability up to 2.7GHz, ensuring efficient handling of demanding workloads. The system is equipped with 64GB of DDR4 ECC UDIMM memory, which enhances reliability and stability in multi-user environments by reducing the risk of data corruption during complex operations.

Storage capacity is provided through 16 x 8TB SATA 2.5" SSDs, totaling 128TB of ultra-fast storage space. This configuration allows for high-speed sequential read performance of up to 6,258 MB/s and over 234K random read IOPS for 4K files, making it ideal for applications that require rapid data access and processing. The NAS includes dual-port 10GbE LAN connectivity with support for link aggregation and failover, enabling high-speed network transfers and redundancy in critical environments.

To ensure continuous operation even in the event of hardware failure or environmental disruptions, the RS4021xs+ is equipped with redundant power supplies and hot-swappable fans. These features contribute to service continuity by minimizing downtime through built-in Synology High Availability (SHA) technology that enables active-passive clustering with failover at the minute level. This setup ensures mission-critical data remains accessible without interruption.

The RS4021xs+ also supports virtualization environments through its iSCSI storage capabilities, seamlessly integrating with mainstream solutions such as VMware vSphere, Microsoft Hyper-V, Citrix XenServer, and OpenStack Cinder. Integration features like vSphere 6.5 compatibility and VAAI support enhance performance by offloading data transfer tasks to the storage layer. Additionally, Windows Offloaded Data Transfer (ODX) simplifies management while Synology Storage Console provides centralized control over storage provisioning and monitoring.

The NAS includes an internal file system formatted using EXT4 and Btrfs for advanced LUN management in iSCSI services. It is housed in a rack-mountable form factor suitable for deployment in server racks within enterprise settings. Connectivity options include four RJ-45 1GbE ports alongside two RJ-45 10GbE ports for flexible networking needs, along with two USB 3.2 ports and two expansion ports to accommodate additional peripherals or future scalability.

The system operates on Synology DiskStation Manager (DSM), a feature-rich operating system that provides reliable data security through snapshot technology, encryption options, and centralized management tools tailored for business use cases. The product arrives in a sealed box with all components included separately—hard drives and memory modules are not pre-installed; installation is required upon setup.

Overall, the Synology RS4021xs+ offers an exceptional balance of performance, reliability, and flexibility tailored for businesses needing secure storage solutions capable of managing large-scale data workloads efficiently across multiple users or virtualized environments. Its advanced architecture makes it well-suited for applications ranging from enterprise file sharing to cloud-based services requiring high availability and fault tolerance.