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Synology RX415 4-Bay Expansion Unit for 1U RackStation NAS

Model: SY50026 / Item No: 403921

Synology RX415 4-Bay Expansion Unit for 1U RackStation NAS

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4-Bay Expansion Unit increases capacity of 1U RackStation servers

Synology RX415 delivers an effortless volume expansion and data backup solution for Synology’s 1U RackStation servers by providing an additional 4 drive slots. With its new short-depth chassis design, RX415 ensures easy installation and deployment in 2-post racks and wall mount racks.


  • Plug-and-Use Design for Seamless Storage Space Upgrade
  • Online Volume Expansion
  • 12-Inch Depth to Fit in 2-Post Racks & Wall Mount Racks
  • Energy-Saving Deep Sleep Mode
  • Managed from Synology DiskStation Manager (DSM)

Volume Expansion & Backup

When drive capacity is running low on a Synology 1U RackStation, Synology RX415 provides an easy way to immediately scale capacity by providing an additional 4 slots. A RAID volume on the Synology RackStation can be expanded directly without having to reformat the existing drives, ensuring the Synology RackStation continues providing services during capacity expansion.

Synology RX415 can serve as a dedicated local backup solution for a Synology RackStation. When created as a separate volume, the Synology RX415 provides a great backup solution for local drives in case of system failure.

Reliable Plug-and-Use and Short-Depth Chassis Design

RX415 securely connects to Synology’s 1U RackStation servers with a specially designed eSATA cable, ensuring easy connection and maximum data throughput. With its exceptional 12-inches short-depth chassis design, RX415 can be deployed in both industrial standard environments and smaller server rooms with limited space. Optional Synology Rail Kits are also available for easy system maintenance.

Green & Easy to Manage

Deep Sleep can be manually configured to start automatically when the system has been inactive for a period of time. This not only saves energy but also extends the lifespan of hard drives. RX415 will also smartly power on/off with the attached RackStation, so no user intervention is needed to keep this system running smartly and efficiently.


Hardware Specifications
Supported Models (See More)
  • RS814(RP)+
  • RS814
  • RS812(RP)+
  • RS812
  • RS214 (as external storage only)
Note DSM version requirement: 5.0-4493 Update 3 or later version
Drive Bay(s) 4
Compatible Drive Type
  • 3.5" SATA(III) / SATA(II) HDD
  • 2.5" SATA(III) / SATA(II) HDD
  • 2.5" SATA(III) / SATA(II) SSD
Max. Internal Raw Capacity 24 TB (6 TB HDD X 4) (Capacity may vary by RAID types) (See All Supported HDD)
Hot Swappable Drive  
RAID Management through Synology DSM  
External Ports
eSATA port 1
Size 44 mm X 430.5 mm X 290 mm
Weight 4.23 kg 
Power Recovery Synchronized with the Synology RackStation
Power Supply Unit / Adapter 150W 
AC Input Power Voltage 100V to 240V AC
Power Frequency 50/60 HZ, Single Phase
Power Consumption 48.4W (Access) 
24.2W (HDD Hibernation) 
Note Measured fully loaded with Western Digital® 3TB WD30EZRS hard drives. The figures could vary on different environments.
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
System Fan 40 mm X 40 mm X 3 pcs
Noise Level 25.1 dB(A) 
Note Noise Level Testing Environment: Fully loaded with Seagate 1TB ST31000520AS hard drive(s) in idle; Two G.R.A.S. Type 40AE microphones, each set up at 1 meter away from the Synology NAS front and rear; Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
  • FCC Class A
  • CE Class A
Warranty 3 Years
Environment & Packaging
Environment RoHS Compliant
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
  • Synology RKS1314 - Rail Kit Sliding
  • Synology RKM114 - Rail Kit Mounted


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Ph: 02-92800583 
Usually 24 hours after placing your order.

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