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Synology 12 bay Expansion Unit DX1215 (Diskless)

RM 5,550.00
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Synology DX1215 delivers an effortless volume expansion and data backup solution for selected Synology DiskStation servers by providing an additional 12 drive slots with SATA III 6Gb/s interface support. Synology DX1215 is backed with Synology’s 5-year limited warranty.


Volume Expansion & Backup

When drive capacity is running low on a Synology DiskStation, Synology DX1215 provides an easy way to immediately scale capacity by providing an additional 12 drive slots. A RAID volume on the Synology DiskStation can be expanded directly without having to reformat the existing drives, ensuring the Synology DiskStation continues providing services during capacity expansion.

Synology DX1215 can serve as a dedicated local backup solution for a Synology DiskStation. When created as a separate volume, the Synology DX1215 provides a great backup solution for local drives in case of system failure.

Reliable Plug-and-Use Design

DX1215 securely connects to Synology’s DiskStation servers with a specially designed expansion cable, ensuring easy connection and maximum data throughput. The 6Gb/s connection speed allows the drives in the connected Synology DX1215 to operate as the internal ones of Synology DiskStation.

Green & Easy to Manage

Hibernation mode 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. DX1215 will also smartly power on/off with the attached DiskStation, so no user intervention is needed to keep this system running smartly and efficiently.

DX1215 comes with a fast detachable fan module with two 120 X 120mm fans and screwless drive trays, making system components replacement fast and tool-free.


Hardware Specifications

Applied Models

Supports creating volumes across different units

  • FS1018
  • DS3617xs
  • DS3018xs
  • DS2419+


  • 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: 5.1-5004 or later version


Drive Bays


Compatible Drive Type* (See all supported drives)

  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD

Maximum Internal Raw Capacity

192 TB (16 TB drive x 12) (Capacity may vary by RAID types)

Hot Swappable Drive


RAID Management through Synology DSM


External Ports

Expansion Port



Size (Height x Width x Depth)

270 mm x 300 mm x 340 mm


9.02 kg


Power Recovery

Synchronized with the Synology DiskStation

Power Supply Unit / Adapter

500 W

AC Input Power Voltage

100 V to 240 V AC

Power Frequency

50/60 Hz, Single Phase

Power Consumption*

51.23 W (Access)
 21.71 W (HDD Hibernation)

British Thermal Unit

174.80 BTU/hr (Access)
 74.08 BTU/hr (HDD Hibernation)


Power consumption is measured when it's fully loaded with Western Digital 1TB WD10EFRX hard drive(s).


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

120 mm x 120 mm x 2 pcs

Easy Replacement System Fan


Noise Level*

27.2 dB(A)


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%


  • FCC
  • CE
  • BSMI
  • EAC
  • KC


5 Years


The warranty period starts from the purchase date as stated on your purchase receipt.

Environment & Packaging


RoHS Compliant

Packaging Content

  • Main Unit X 1
  • User's Guide X 1
  • Accessory Pack X 1
  • AC Power Cord X 1
  • Expansion Cable: Infiniband X 1


  • Main Unit X 1
  • User's Guide X 1
  • Accessory Pack X 1
  • AC Power Cord X 1
  • Expansion Cable: Infiniband X 1

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