Expansion Unit DX1222
Easily double or triple the storage capacity of your Synology DiskStation
Overview:
Add 12 bays to your DiskStation on the fly
Use Synology Expansion Unit DX1222 to add 12 additional bays to your deployment while keeping your storage and services online and uninterrupted.
- Simple Installation
Add 12 additional drive bays to your DiskStation1 with minimal disruption - Fast and Intuitive Setup
Configure new storage in minutes with Synology DSM's unified tools - Ready for Synology Drives
Ensure highest reliability with Synology enterprisegrade drives - Extended Support
Backed by Synology’s 5-year limited warranty
Features:
Fast setup
Your additional storage will be ready to use in a matter of moments after you connect it to your host NAS.1 Online volume expansion enables you add a new volume or expand RAID volumes without reformatting drives through DiskStation Manager (DSM).


Centrally manage all your drives
Benefit from unified drive management after connecting the DX1222 to your primary NAS. Maintenance, monitoring, and administration of drives on both units is simple with Synology DSM.
Achieve More With Synology Drives
Synology enterprise-grade drives, developed in tandem with Synology storage systems, provide proven interoperability and high reliability through rigorous validation. Combine them with Synology DiskStation and DX1222 for a highly reliable and integrated storage setup, and receive long-term Synology updates and support.
Technical Specifications:
Hardware Specifications: | |
---|---|
Applied Models | 22 series:DS3622xs+, DS2422+ |
Storage | |
Drive Bay(s) | 12 |
Compatible Drive Type |
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Hot Swappable Drive | |
RAID Management through Synology DSM | |
External Ports | |
Expansion Port | 1 |
Appearance | |
Size (Height X Width X Depth) | 270 mm x 300 mm x 340 mm |
Weight | 9.02 kg |
Power | |
Power Recovery | Synchronized with the Synology DiskStation |
Power Supply Unit / Adapter | 550W |
AC Input Power Voltage | 100V to 240V AC |
Power Frequency | 50/60 Hz, Single Phase |
Power Consumption* |
57.71 W (Access) 16.25 W (HDD Hibernation) |
British Thermal Unit |
194.96 BTU/hr (Access) 55.48 BTU/hr (HDD Hibernation) |
Note | Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s). |
Temperature | |
Operating Temperature | 5°C to 40°C (40°F to 104°F) |
Storage Temperature | -10°C to 70°C (-15°F to 155°F) |
Relative Humidity | 5% to 95% RH |
Others | |
System Fan | 120 mm x 120 mm x 2 pcs |
Easy Replacement System Fan | |
Noise Level | 24.6 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% | Certification |
|
Warranty | 5 Years |
Environment & Packaging | |
Environment | RoHS Compliant |
Packaging Content |
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Optional Accessories |
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*Model specifications are subject to change without notice. Please refer to www.synology.com for the latest information.
Documentation:
Download the Synology Expansion Unit DX1222 Datasheet (PDF).

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, providing responsive technical support and hardware replacement services to maximize your return on investment.
- All Prices are Inclusive of GST
- Pricing and product availability subject to change without notice.