Expansion Unit RX1217sas

Effortless capacity expansion for Synology FlashStation and RackStation solutions on-the-fly.

12-bay 3.5"/2.5" SAS/SATA expansion

Easily add 12 additional drive bays to Synology FlashStation or RackStation1. Supporting both 2.5" and 3.5" SAS/SATA drives, the RX1217sas is a flexible solution supporting on-the-fly volume expansion or serving as a local backup destination.

Maximum reliability design

Dual power supplies ensure continuous service uptime. Easily replace defective drives with the hot swappable drive trays. Experience fast and secure rack cabinet installation with the optional slinding rail kit RKS1317.

5 Year Warranty

Synology's 5-year limited warranty provides hardware replacement and technical support via email and telephone services, maximizing your enterprises' return on investment.

Synology Replacement Services(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.

Hardware Specifications 
Applied ModelsFS3017*
NoteConnecting to a Synology FlashStation FS3017 requires the optional FS3017 Expansion Card (FXC17) to be installed on the host device. FS3017 Expansion Card is sold separately.
Drive Bays12
Compatible Drive Type* (See all supported drives)3.5" SAS HDD
 2.5" SAS HDD
 2.5" SAS SSD
 3.5" SATA HDD
 2.5" SATA SSD
Maximum Internal Raw Capacity144 TB (12 TB drive x 12) (Capacity may vary by RAID types)
Hot Swappable Drive 
RAID Management through Synology DSM 
External Ports 
SAS IN-port1
SAS OUT-port1
Size (Height x Width x Depth)88 mm x 482 mm x 724 mm
Weight18 kg
Power RecoverySynchronized with the Synology RackStation
Power Supply Unit / Adapter2 x 500W
AC Input Power Voltage100V to 240V AC
Power Frequency50/60 Hz, Single Phase
Power Consumption*132.7 W (Access)
 89.3 W (HDD Hibernation)
British Thermal Unit452.79 BTU/hr (Access)
 304.7 BTU/hr (HDD Hibernation)
NotePower consumption is measured when fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
Redundant Power Supply (for RP model) 
Operating Temperature5°C to 35°C (40°F to 95°F)
Storage Temperature-20°C to 60°C (-5°F to 140°F)
Relative Humidity5% to 95% RH
System Fan60 mm x 60 mm x 4 pcs
Easy Replacement System Fan 
Noise Level*60.9 dB(A)
Warranty5 Years
Environment & Packaging 
EnvironmentRoHS Compliant
Packaging ContentMain Unit X 1
 Accessory Pack X 1
 AC Power Cord X 2
 Expansion Cable: MiniSAS-HD X 1
 Quick Installation Guide X 1