Synology RX418 4-Bay Expansion Unit
Description
The Synology RX418 is a 1U rackmount, diskless expansion unit that adds four hot-swappable SATA drive bays to compatible 1U RackStation NAS systems. It operates as if the drives were internal, supports online volume expansion, and can serve as a dedicated local backup destination for data protection and capacity scaling.
Hardware Specifications
| Specification | Details |
|---|---|
| Drive Bays | 4 × hot-swappable 3.5″/2.5″ SATA HDD/SSD |
| Expansion Interface | eSATA |
| Supported Host DSM Version | DSM 6.1.4-15217-3 or later |
| Host Compatibility | Synology 1U RackStation models with expansion port |
| Dimensions (H × W × D) | 44 mm × 480 mm × 325 mm |
| Weight | 9.44 lb (4.28 kg) |
| Power Input | 100–240 VAC (external adapter) |
| Operating Temperature | 5 °C to 40 °C |
| Storage Temperature | –20 °C to 60 °C |
| Humidity (Op./Storage) | 5 %–95 % RH (non-condensing) |
| Warranty | 3-year hardware (extendable to 5 years with Extended Warranty Plus) |
Key Features
- Online Volume Expansion
Grow RAID arrays and volumes in DSM without shutting down or reformatting. - Plug-and-Play Integration
Automatically detected by DiskStation Manager; no additional software required. - Dedicated Local Backup
Configure RX418 as a separate volume for on-premises backups of your RackStation. - Energy-Efficient Drive Hibernation
Schedule automatic spin-down in DSM to conserve power and extend drive lifespan. - Synology-Validated Drives
Full functionality, reliability, and warranty guaranteed when using Synology-listed HDDs/SSDs.
Compatibility
Compatible with Synology 1U RackStation units featuring an eSATA expansion port, including but not limited to:
- RS1219+ / RS1219RP+
- RS818+ / RS818RP+
- RS1619xs+ / RS1619+
- RS2418+ / RS2418RP+
- RS818(RP/+/RP+)/RS118/RX1217(RP)
(Refer to Synology’s compatibility list for full details.)
Environmental & Acoustic
- Power consumption is measured with WD10EFRX 1 TB drives fully loaded; see Synology documentation for specific values.
- Noise level tested fully loaded with Seagate ST31000520AS drives under idle conditions using dual G.R.A.S. Type 40AE microphones at 1 m distance (background noise: 16.49–17.51 dB(A)).
Ideal Use Cases
- Rapidly expand capacity for file sharing, backups, or surveillance archives
- Deploy a dedicated local backup target to safeguard critical NAS data
- Scale storage without additional rack space in high-density installations
- Seamlessly integrate into existing high-availability or clustered RackStation setups
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