Expansion Unit RX418
Compatibility Downloads
Compatibility Downloads
Sign up for Synology newsletters

Expansion Unit RX418

4-bay 1U rackmount expansion unit for 1U RackStation

RX418
RX418

Storage capacity expansion

When the storage capacity on Synology 1U RackStation reaches its limit, Synology expansion unit RX418 provides easy capacity expansion by adding 4 3.5"/2.5" SATA drives to the system. Synology RX418 can also be used as a dedicated local backup destination of Synology 1U RackStation for comprehensive data protection.

Reliable plug-and-play design

Simply connect Synology RX418 to corresponding Synology RackStation and it is ready to use. Drives in the connected Synology RX418 operate as though they were internal to the connected Synology NAS and can be managed directly by Synology DiskStation Manager (DSM), with no additional software installation required.

Green and easy to manage

Award-winning Synology DSM provides an intuitive user interface for easy system management. Drive hibernation can be configured in DSM to take effect automatically when the system has been inactive for a period of time. This not only saves energy but also extends the lifespan of the installed drives.

Backed by Synology drives

Leverage high sustained performance and reliability with enterprise-grade drives with built-in data protection designed for Synology systems.

Enterprise Series 3.5" SATA Plus Series 3.5" SATA
Enterprise Series 2.5" SATA
img enterprise-hat img plus-hat3310 img enterprise-sat

Notes:

  1. Storage drives are sold separately. Refer to the compatibility list for compatible devices.

Hardware Specifications
Applied Models
Applied Models
 Supports creating volumes across different units
  • 22 series:RS822RP+, RS822+
  • 21 series:RS1221RP+, RS1221+
  • 20 series:RS820RP+, RS820+
  • 19 series:RS1219+, RS819
  • 18 series:RS818RP+, RS818+
  • 16 series:RS816
  • 15 series:RS815RP+, RS815+, RS815
Supports creating volumes on a single unit only RS217
Notes
  • For more information on the compatibility of each expansion unit, please refer to this article.
  • To have better performance, we recommend creating storage volumes physically located within the same NAS or Expansion Unit, rather than creating volumes across your NAS and Expansion Unit.
  • DSM version requirement: 6.1.4-15217-3 or later version
Storage
Storage
 Drive Bays 4
Compatible Drive Type* (See all supported drives)
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
RAID Management through Synology DSM
Notes Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
External Ports
External Ports
 eSATA Port 1
Appearance
Appearance
 Size (Height x Width x Depth) 44 mm x 430.5 mm x 290 mm
Size (Height x Width x Depth) (with server ears) 44 mm x 480 mm x 325 mm
Weight 4.28 kg
Rack Installation Support*
  • 4-post 19" rack (Synology Rail Kit - RKM114/RKS-02)
  • 2-post 19" rack (direct mounting)
Notes The rail kit is sold separately
Power
Power
 Power Recovery Synchronized with the Synology RackStation
Power Supply Unit / Adapter 100 W
AC Input Power Voltage 100V to 240V AC
Power Frequency 50/60 Hz, Single Phase
Power Consumption 23.26 W (Access)
6.39 W (HDD Hibernation)
British Thermal Unit 79.42 BTU/hr (Access)
21.82 BTU/hr (HDD Hibernation)
Notes Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
Temperature
Temperature
 Operating Temperature 5°C to 35°C (40°F to 95°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F)
Relative Humidity 5% to 95% RH
Others
Others
 System Fan 40 mm x 40 mm x 3 pcs
Noise Level* 25.1 dB(A)
Notes Noise Level Testing Environment: Fully loaded with Seagate 1TB ST31000520AS hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
Certification
Certification
  • FCC
  • CE
  • BSMI
  • EAC
  • VCCI
  • RCM
  • KC
Warranty
Warranty
 3-year hardware warranty, extendable to 5 years with EW201
Notes
  • Availability varies by region. Before purchasing, please visit the official web pages of EW201/202 and Extended Warranty Plus for a list of eligible regions.
  • The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment & Packaging
Environment
Environment
 RoHS Compliant
Packaging Content
Packaging Content
  • Main Unit X 1
  • User's Guide X 1
  • Accessory Pack X 1
  • AC Power Cord X 1
  • Expansion Cable: eSATA X 1
Optional Accessories
Optional Accessories
Notes Certain items may not be available in your location. Please contact your local distributors for more information.

Notes:

  1. Model specifications are subject to change without prior notice.
  2. The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.
  3. The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.
  4. If usage requirements exceed the specifications above, please contact our regional partners for professional advice.