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Synology Expansion Unit DX1215II Plug-and-play storage expansion for Synology DiskStation

Synology Expansion Unit DX1215II Plug-and-play storage expansion for Synology DiskStation

12 Drive Bays, 5 Years Warranty


38,000.00 บาท (รวมภาษี)


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Expansion Unit DX1215II

Plug-and-play storage expansion for Synology DiskStation


Easily add 12 bays to your DiskStation

With its 12-bay desktop form factor, the DX1215II provides generous storage expansion for Synology DiskStation1 whenever needed with minimal impact on the deployment footprint.

Online volume and storage expansion

Add a new volume to your storage, or seamlessly expand RAID volumes on Synology DiskStation without reformatting drives with online volume expansion through DiskStation Manager (DSM) to minimize service disruptions.

Online volume and storage expansion

Expand DiskStation with Synology drives

Developed in tandem with Synology storage systems, Synology enterprise storage drives deliver proven interoperability and high reliability through rigorous validation and compatibility testing.


Simple setup and management

Plug-and-play design makes adding the DX1215II to an existing DiskStation simple. Unified drive management through DSM ensures health monitoring, storage allocation, and maintenance tasks are centralized and easily accessible to administrators.

Simple setup and management

5-year warranty

At Synology, we are committed to product innovation and quality. Synology guarantees a robust and reliable data management experience with a 5-year limited warranty,2 providing responsive technical support and hardware replacement services to maximize your return on investment. Learn more

5-year warranty


  1. View specifications for a list of supported models. Requires DSM 6.2.4-25556 or newer to be installed on the host device.
  2. The warranty period starts from the date of purchase as stated on your purchase receipt. Visit for more information.

Hardware Specifications

Hardware Specifications

Applied Models

Supports creating volumes across different units
  • FS series:FS1018
  • 19 series:DS2419+, DS2419+II
  • 18 series:DS3018xs
  • 17 series:DS3617xs, DS3617xsII
  • 15 series:DS3615xs, DS2415+, DS2015xs
  • 13 series:DS2413+
  • 12 series:DS3612xs
  • 11 series:DS3611xs, DS2411+

Notes 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.


Drive Bays 12

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

Notes It is strongly recommended that you only install drives listed on your device's compatibility list. Storage pool and volume creation processes may fail when using unverified drives. Synology is unable to provide technical support for devices using unsupported components.

External Ports

Expansion Port 1


Size (Height x Width x Depth) 270 mm x 300 mm x 340 mm

Weight 9.02 kg


Power Recovery Synchronized with the Synology DiskStation

Power Supply Unit / Adapter 550 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 174.69 BTU/hr (Access)
74.03 BTU/hr (HDD Hibernation)

Notes Power consumption is measured when it is 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)

Notes Noise Level Testing Environment: Fully loaded with Seagate ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology expansion unit 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
  • RCM
  • KC


5 Years

Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)

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

Optional Accessories



Model specifications are subject to change without prior notice. 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. The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations. If usage requirements exceed the specifications above, please contact our regional partners for professional advice.


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