Synology RXD1215sas bold Expansion Unit Rackmount 12 bays (SAS drive only)


Synology RackStation Expansion Unit RXD1215sas

Synology high-availability cluster integrates two RackStation RC18015xs+ as dual computing nodes and multiple Expansion Unit RXD1215sas as shared storage
units, providing the secure, reliable, and superior-performance network attached storage solution for large scale businesses. RC18015xs+ and RXD1215sas
are backed with a 5-year limited warranty.

High-availability cluster1
by dual computing nodes &
shared storage
● Data protection by snapshot
● SSD cache support
● Scale up to 180 drives with 15
● Superior performance fueled by
quad-core 3.3GHz CPU in each
computing node
● Optional 10GbE network
● VMware®, Citrix®, and Microsoft®
Hyper-V® certified

RackStation Expansion Unit RXD1215sas

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SKU: RXD1219sas Category:
tech brand


Hardware Specifications

Applied Models

Supports creating volumes across different units RC18015xs+
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.


Drive Bays 12
Compatible Drive Type* (See all supported drives)
  • 3.5″ SAS HDD
  • 2.5″ SAS HDD
  • 2.5″ SAS 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

External Ports

SAS IN-port 2
SAS OUT-port 2


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 18 kg
Rack Installation Support* 4-post 19″ rack (Synology Rail Kit – RKS1317)
Notes The rail kit is sold separately


Power Recovery Synchronized with the Synology RackStation
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* 248 W (Access)
90 W (HDD Hibernation)
British Thermal Unit 846.21 BTU/hr (Access)
307.09 BTU/hr (HDD Hibernation)


Operating Temperature 5°C to 35°C (40°F to 95°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F)
Relative Humidity 5% to 95% RH


System Fan 60 mm x 60 mm x 4 pcs
Easy Replacement System Fan
Noise Level* 48 dB(A)


  • FCC
  • CE
  • BSMI


5 Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)

Environment & Packaging


RoHS Compliant

Packaging Content

  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Expansion Cable: MiniSAS X 2
  • Quick Installation Guide X 1

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