Synology Inc. RS3618xs 12-bay rackmount NAS

12-bay 2U rackmount NAS for large-scale enterprises

The Synology RS3618xs is a diskless rackmount network-attached storage server built for organisations that need high throughput and capacity in a compact 2U form factor. It targets IT departments running virtualisation workloads, heavy file sharing or centralised backup for many concurrent users. Four integrated Gigabit Ethernet ports provide link aggregation and failover from day one.

Tool-less drive trays and optional expansion units

Twelve hot-swappable trays accept 3.5-inch or 2.5-inch SATA drives without tools, so initial population and later replacements are straightforward. The chassis can scale to 36 drives by attaching RX1217 or RX1217RP expansion units, though each additional enclosure adds cabling and rack space that must be planned. Memory upgrades use standard DDR4 ECC UDIMMs across four slots, reaching 64 GB total.

Steady power draw under continuous multi-user load

During sustained access the unit draws approximately 142.76 watts, dropping to 55.05 watts when drives enter hibernation. The Intel Xeon D-1521 quad-core processor maintains its 2.4 GHz base clock under prolonged virtualisation or backup streams, with turbo available for shorter bursts. Operating temperature range of 5 °C to 35 °C means adequate rack airflow is essential for 24/7 deployments.