Synology RX418 4-Bay Expansion Unit

Overview

The Synology RX418 is a 4-bay rackmount expansion unit designed to increase storage capacity for compatible Synology RackStation NAS devices. It connects via a single eSATA cable, allowing you to add four additional SATA drives without replacing your existing hardware. The unit supports both 3.5 inch and 2.5 inch hard drives or solid-state drives, and its hot-swappable bays enable drive replacement or upgrades without interrupting server operation. With a compact 12 inch depth and quiet operation at 25.1 dBA, it fits well in standard or wall-mounted racks and maintains a low noise profile suitable for small server rooms.

Key features

• Four additional SATA drive bays expand your NAS storage seamlessly through a single eSATA connection
• Supports both 3.5 inch and 2.5 inch HDDs and SSDs, offering flexibility in drive choice
• Hot-swappable drive trays allow you to replace or upgrade drives without downtime, keeping your system online
• Managed entirely through Synology DiskStation Manager, providing a familiar and unified interface for volume creation, RAID setup, and snapshot scheduling
• Integrated 100 watt power supply supports worldwide voltages from 100 to 240 volts AC for versatile deployment
• Drive hibernation reduces power consumption when disks are idle, helping to save energy
• Compact 12 inch depth fits both standard and wall-mount racks, optimizing space in your server environment
• Quiet operation at 25.1 dBA minimizes noise impact in office or lab settings
• Includes all necessary accessories such as AC power cord, eSATA cable, and mounting hardware for quick installation

Key specs

• Drive bays: 4 SATA (3.5 inch and 2.5 inch compatible)
• Connection interface: Single eSATA cable
• Power supply: Integrated 100 watt, 100-240V AC input
• Dimensions (depth): 12 inches
• Noise level: 25.1 dBA
• Drive hibernation: Supported

Connectivity and compatibility

The RX418 connects to your Synology RackStation via a single eSATA cable, which is included in the package. This connection integrates the expansion unit directly into your existing NAS system, making the additional storage appear instantly within DiskStation Manager. It is compatible with a range of Synology RackStation models that support expansion units, allowing you to scale your storage as your data needs grow.

Installation and setup

Installation is straightforward with the included accessory pack, AC power cord, and eSATA cable. The unit’s compact 12 inch depth allows it to fit easily into standard or wall-mounted racks, making it suitable for various server room configurations. Once connected, the expansion unit is managed through Synology’s DiskStation Manager, so you can configure volumes, RAID arrays, and snapshots using the same interface you already know, simplifying storage management.

Ideal uses and environments

This expansion unit is well suited for offices that need to grow shared storage without replacing existing NAS hardware, creative studios archiving large media files, and home labs managing surveillance footage. Its quiet operation and compact size make it a good fit for small server rooms or workspaces where noise and space are considerations. The hot-swappable bays and energy-saving features support environments that require continuous uptime and efficient power use.