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Synology RackStation RS4021xs+

Enterprise NAS with built-in service continuity engineered for data-intensive applications.

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    Securing your business assets

    The 16-bay RS4021xs+ provides solid data security and lightening-fast performance with over 234K 4K random read IOPS and 6,258 MB/s sequential read throughput. Together with its 8-core processor, ECC memory, advanced snapshot technology, and built-in 10GbE connectivity, the RS4021xs+ can support large multi-user environments while handling data-intensive workloads.

    High Performance 3U Storage for Enterprise Data Management

    Synology RackStation RS4021xs+ is a powerful 16-bay 3U storage solution designed for high throughput and data integrity, made with built-in redundant power. Equipped with an 8-core processor and upgradable to 64 GB memory, the RS4021xs+ is capable of hosting demanding services involving virtualization, mail, office collaboration, and surveillance, to meetthe unique requirements of enterprise environments.

    Built to Handle Intensive Workloads

    Synology RackStation RS4021xs+ is built to deliver exceptional performance, flexibility, and scalability for demanding enterprise environments.

    • Up to 234,698 4K random read IOPS and 6,258 MB/s sequential read performance for demanding workloads.
    • Featuring 16 drive bays supporting both SATA HDD/SSD 2.5/3.5" drives, expandable to 40 bays using two Synology RX1217(RP) expansion units.

    Key Features

    • Accelerated Performance – Up to 234,698 random read IOPS and 6,258 MB/s sequential read performance.
    • Powerful Compute – Host multiple compute-intensive services with its 8-core Intel® processor.
    • Upgradability – Two PCIe expansion slots allow for M.2 NVMe cache adapters and high-bandwidth network cards.
    • Redundant Power – Ensure business continuity with two redundant power supplies.
    • On-demand Scalability – Supports up to 40 drive bays using two RX1217(RP).

    What’s In The Box

    • 1 x RS4021xs+ main unit
    • 1 x Quick Installation Guide
    • 1 x Accessory pack
    • 2 x AC power cords



    At Synology, we strive to re-define what a network-attached storage (NAS) can achieve with a thoroughly new digital experience. Dedicated to bring businesses and home users reliable and affordable ways to centralize data storage, simplify data backup, share and sync files across different platforms, and access data on-the-go.