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Synology Expansion Unit RX2417sas 24-Bay 2.5" Diskless NAS (2U Rack) (SMB/ENT) for Scalable NAS Models FS3017 / RS18017xs+ / FS2017 with SRS! 


Effortless capacity expansion for Synology FlashStation and RackStation1solutions on-the-fly.

24-bay 2.5” SAS/SATA expansion

Easily add 24 additional drive bays to Synology FlashStation or RackStation1. Supporting 2.5” SAS/SATA drives, the RX2417sas 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 sliding 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.


  • View specifications for a list of supported models.
  • Actual shipping and turnover time is dependent on location and is a best-effort based on replacement availability. Next business-day shipping is not guaranteed for all replacements, locations, or at all times. For detailed information on the service, please visit Synology Replacement Service (SRS) website at https://srs.synology.com.


Hardware Specifications

Applied Models




Connecting to a Synology FlashStation FS3017 requires the optional FS3017 Expansion Card to be installed on the host device. FS3017 Expansion Card is sold separately.


Drive Bay(s)


Compatible Drive Type

2.5" SAS HDD

2.5" SAS SSD


Hot Swappable Drive


RAID Management through Synology DSM


External Ports

SAS IN-port


SAS OUT-port



Size (Height x Width x Depth)

88 mm x 482 mm x 724 mm 


16.6 kg 


Power Supply Unit / Adapter

2 x 500W 

AC Input Power Voltage

100V to 240V AC

Power Frequency

50/60 Hz, Single Phase

Power Consumption*

201.6 W (Access) 

117.2 W (HDD Hibernation) 

British Thermal Unit

687.89 BTU/hr (Access) 

399.9 BTU/hr (HDD Hibernation) 

Redundant Power Supply (for RP model)



Operating Temperature

5C to 35C (40F to 95F)

Storage Temperature

-20C to 60C (-5F to 140F)

Relative Humidity

5% to 95% RH


System Fan

60 mm x 60 mm x 4 pcs

Easy Replacement System Fan


Noise Level*

60.8 dB(A) 


FCC Class A

CE Class A

BSMI Class A


5 Years

Environment & Packaging


RoHS Compliant

Packaging Content

Main Unit X 1

Accessory Pack X 1

AC Power Cord X 2

Expansion Cable: MiniSAS-HD X 1

Quick Installation Guide X 1

Optional Accessories

Synology RKS1317 - Rail Kit Sliding

No additional files, specification sheets, guides or documentation found for product.

Warranty: 60 Month Manufacturers Return To Base

Full manufacturers warranty details are available at the manufacturers (Synology) web site.

Unless otherwise specified Techbuy is normally your first point of contact for warranty related returns, further information regarding our warranty policies and consumer guarantees is available on our policies and service & support pages.

To apply for return of a product just go to our returns page.

These terms are in addition to and do not affect any terms, conditions, guarantees and warranties implied by law.

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