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 with a maximum of seven Synology RX1222sas expansion units.1 Add volumes when and where needed without interrupting services, thanks to Synology DiskStation Manager (DSM)’s online volume expansion and powerful volume management options.

pplied Models
Supports creating volumes across different units
SA series:SA3600, 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.
Storage
Drive Bays 12
Compatible Drive Type* (See all supported drives)
3.5″ SAS HDD
3.5″ 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.
“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
SAS IN-port 1
SAS OUT-port 1
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)
4-post 19″ rack (Synology Rail Kit – RKS1317)
Notes The rail kit is sold separately
Power
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* 194.4 W (Access)
82.56 W (HDD Hibernation)
British Thermal Unit 663.48 BTU/hr

Manufacturer Link: https://www.synology.com/en-au/products/RX1222sas#specs

Warranty: 0