Synology RXD1219sas Expansion Unit Rackmount 12 bays (SAS drive only)


Synology RXD1219sas Expansion Unit Rackmount 12 bays (SAS drive only)

RXD1219sas is a 2U expansion unit, providing an easy storage space upgrade solution for your Synology servers1.

It can add up to 12 additional 2.5″ / 3.5″ SAS drive bays on the fly when connected directly with a mini-SAS HD cable.

Volume Expansion and Backup
Simply connect Expansion Unit RXD1219sas to the corresponding  server1 and it is ready to use. No additional software installation is required to upgrade your storage space seamlessly.
The RXD1219sas is a flexible solution supporting on-the-fly volume expansion or serving as a local backup destination. When your server runs low on storage space, RXD1219sas provides easy capacity expansion by adding 12 additional 3.5″ / 2.5″ SAS drives to the system.

Plug-and-play design for a seamless storage space upgrade
• 12 additional SAS interface drive bays available for online
volume expansion on the fly
• Mini-SAS HD connectivity enabling high performance
data transmission
• Redundant power supplies that maximize service uptime
• Fast rack fixing lock support with Synology Rail Kit
• Backed by Synology’s 5-year limited warranty2

Synology RXD1219sas Expansion Unit Rackmount 12 bays (SAS drive only)
RXD1219sas Expansion Unit Rackmount 12 bays (SAS drive only)

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SKU: RXD1215sas Categories: ,
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Hardware Specifications

Applied Models

Supports creating volumes across different units SA3200D
Supports creating volumes on a single unit only UC3200


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
Notes “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 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 18.2 kg
Rack Installation Support* 4-post 19″ rack (Synology Rail Kit – RKS1317)
Notes The rail kit is sold separately


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* 299.79 W (Access)
British Thermal Unit 1022.93 BTU/hr (Access)
Redundant Power Supply (for RP model)
Notes Power consumption is measured when it is fully loaded with Seagate ST3600057SS hard drive(s).


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


System Fan 60 mm x 60 mm x 4 pcs
Easy Replacement System Fan
Noise Level* 60.9 dB(A)
Notes Noise Level Testing Environment: Fully loaded with Seagate ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology expansion unit at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%.


  • FCC
  • CE
  • BSMI
  • EAC
  • VCCI
  • RCM
  • KC


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: Mini-SAS HD X 2
  • Quick Installation Guide X 1

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