Accommodate massive storage growth

Expand your Synology rackmount SAS storage 12 bays at a time, for up to 84 additional 3.5"/2.5" SAS/SATA drives over a maximum of seven Synology RX1222sas expansion units. Add volumes when and where you need without interrupting services, thanks to Synology DiskStation Manager (DSM)’s online volume expansion and powerful volume management options.

Download Datasheet

Easy setup and management

Connect the RX1222sas through the included expansion cable and start managing the additional storage in minutes using Storage Manager and other intuitive tools in Synology DSM. Online volume expansion enables you to add a new volume or expand RAID volumes without reformatting drives.

Fast and stable with Synology drives

Achieve higher levels of reliability with Synology’s SAS and SATA enterprise drives. Backed by hundreds of thousands of hours of rigorous testing, they ensure maximum integration and optimal performance when paired with your Synology deployment.

Enterprise Series 3.5" SAS Enterprise Series 3.5" SATA

Enterprise Series 2.5" SATA

Built with service uptime in mind

RX1222sas’s hot-swappable drive trays, fans, and power supplies reduce the impact of maintenance on service availability, and redundant power supply units keep your system online even if one power source fails.

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, including 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:

Requires DSM 6.2.4-25556 Update 3, 7.0.1-42218 Update 2, or later versions to be installed on the host device.
The warranty period starts from the date of purchase as stated on your purchase receipt. Visit https://www.synology.com/company/legal/warranty for more information.

Hardware Specifications
Applied Models
Applied Models	Supports creating volumes across different units	FS series:FS6400, FS3600, FS3400 SA series:SA3610, SA3600, SA3410, SA3400
	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. DSM version requirement: 6.2.4-25556 Update 3, 7.0.1-42218 Update 2 or later versions. (Learn more)
Storage
Storage	Drive Bays	12
	Compatible Drive Type* (See all supported drives)	3.5" SAS HDD 2.5" SAS SSD 3.5" 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. "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
External Ports
External Ports	SAS IN-port	1
	SAS OUT-port	1
Appearance
Appearance	Size (Height x Width x Depth)	88 mm x 430.5 mm x 692 mm
	Size (Height x Width x Depth) (with server ears)	88 mm x 482 mm x 724 mm
	Weight	13.5 kg
	Rack Installation Support*	4-post 19" rack (Synology Rail Kit - RKS-02)
	Notes	The rail kit is sold separately
Power
Power	Power Supply Unit / Adapter	500 W
	AC Input Power Voltage	100V to 240V AC
	Power Frequency	50/60 Hz, Single Phase
	Power Consumption	194.4 W (Access) 82.56 W (HDD Hibernation)
	British Thermal Unit	663.48 BTU/hr (Access) 281.77 BTU/hr (HDD Hibernation)
	Redundant Power Supply
	Notes	Power consumption is measured when it is fully loaded with Synology HAS5300-8T hard drive(s).
Temperature
Temperature	Operating Temperature	0°C to 35°C (32°F to 95°F)
	Storage Temperature	-20°C to 60°C (-5°F to 140°F)
	Relative Humidity	5% to 95% RH
Others
Others	System Fan	80 mm x 80 mm x 4 pcs
	Easy Replacement System Fan
	Noise Level*	54.5 dB(A)
	Notes	Noise Level Testing Environment: Fully loaded with Synology SAT5200-480G SSD 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%
Certification
Certification	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 2 Expansion Cable: Mini-SAS HD X 2 Quick Installation Guide X 1
Optional Accessories
Optional Accessories	Enterprise Series 3.5" SAS HDD: HAS5300 Series Enterprise Series 3.5" SATA HDD: HAT5300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series Rail Kit Sliding: RKS-02

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.