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.

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Fast setup

Your additional storage will be ready to use in a matter of moments after you connect it to your host NAS. Online volume expansion enables you add a new volume or expand RAID volumes without reformatting drives through DiskStation Manager (DSM).

Backed by Synology drives

Engineered to handle intensive 24/7 workloads, Synology drives consistently deliver top-grade performance.

Enterprise Series 3.5" SATA Plus Series 3.5" SATA

Enterprise Series 2.5" SATA

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.

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. Learn more

Synology Replacement Service (SRS)

SRS provides free advance replacement units as early as the next business day in selected regions, maximizing the service uptime for your mission-critical storage and ensuring your business continuity. Learn more

Notes:

See the specifications for a list of supported models. DSM 7.0.1-42218 or a newer version must be installed on the host device.
Storage drives are sold separately. Refer to the compatibility list for compatible devices.
The warranty period starts from the date of purchase as stated on your purchase receipt. Read more here.

Hardware Specifications
Applied Models
Applied Models	Supports creating volumes across different units	22 series:DS3622xs+, DS2422+
	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.
Storage
Storage	Drive Bays	12
	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	Expansion Port	1
Appearance
Appearance	Size (Height x Width x Depth)	270 mm x 300 mm x 340 mm
	Weight	9.02 kg
Power
Power	Power Recovery	Synchronized with the Synology DiskStation
	Power Supply Unit / Adapter	550 W
	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)
	Notes	Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
Temperature
Temperature	Operating Temperature	0°C to 40°C (32°F to 104°F)
	Storage Temperature	-20°C to 60°C (-5°F to 140°F)
	Relative Humidity	5% to 95% RH
Others
Others	System Fan	120 mm x 120 mm x 2 pcs
	Easy Replacement System Fan
	Noise Level*	24.6 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%.
Certification
Certification	UL FCC CE BSMI UKCA EAC VCCI RCM KC
Warranty
Warranty	5 Years
	Notes	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 Accessory Pack X 1 AC Power Cord X 1 Expansion Cable: MiniSAS-HD X 1 Quick Installation Guide X 1
Optional Accessories
Optional Accessories	3.5" SATA HDD: HAT5300/HAT3300 Enterprise Series 2.5" SATA SSD: SAT5200 Series

Notes:

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.