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The top of the RS range. The Synology RS4021xs+ fits 16 bays in 3U with dual onboard 10GbE, two PCIe x8 slots and redundant power — expanding to 40 drives for enterprises running virtualisation, mail, collaboration and surveillance at once.
$6,699.99
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The RS4021xs+ is a 16-bay 3U storage server designed for enterprise environments running virtualization, mail, office collaboration, and surveillance simultaneously. Its 8-core CPU and built-in 10GbE connectivity support large multi-user environments handling data-intensive workloads. It is the only model in this group with two 10GbE ports fitted as standard, leaving both PCIe 3.0 x8 slots free for additional networking or NVMe cache rather than being consumed by the first 10GbE card. With two expansion units it reaches 40 drives — the highest bay count in the RS range.