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


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

SYNOLOGY 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
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.
Maximum Reliability Design
The redundant power supplies ensure maximum service uptime, while
the key system components including SAS modules and system fans are
modularized. In case of failure, they can be replaced easily to ensure
maximum system uptime. The hot-swappable drive trays can also be
replaced with ease if malfunctioned.
With the tool-less design sliding rail kit RKS1317, you can
experience the fast and secure rack cabinet installation effortlessly.
High-Performance Data Transmission
The mini-SAS HD provides high bandwidth connectivity to achieve
maximum throughput during data transfer between your
server and RXD1219sas. It allows the drives in the connected RXD1219sas
to operate as if they are the internal drives of the server with no
data latency.

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

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SKU: RXD1215sas Category:
tech brand


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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