Expansion Unit RX1217sas
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 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.

Synology Replacement Service (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 continuity2. Know more about SRS.
Notes:
- View specifications for a list of supported models.
- Synology guarantees SRS response within the next business-day, and the actual shipping and turnover time is a "best-effort" based on replacement availability.
Hardware Specifications | |
Applied Models |
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Note |
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Storage | |
Drive Bays | 12 |
Compatible Drive Type* (See all supported drives) |
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Maximum Internal Raw Capacity | 168 TB (14 TB drive x 12) (Capacity may vary by RAID types) |
Hot Swappable Drive | |
RAID Management through Synology DSM | |
External Ports | |
SAS IN-port | 1 |
SAS OUT-port | 1 |
Appearance | |
Size (Height x Width x Depth) |
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 separatelty. |
Power | |
Power Recovery | Synchronized with the Synology RackStation |
Power Supply Unit / Adapter |
2 x 500W |
AC Input Power Voltage | 100V to 240V AC |
Power Frequency | 50/60 Hz, Single Phase |
Power Consumption* |
132.7 W (Access) 89.3 W (HDD Hibernation) |
British Thermal Unit |
452.79 BTU/hr (Access) 304.7 BTU/hr (HDD Hibernation) |
Note | Power consumption is measured when fully loaded with Western Digital 1TB WD10EFRX hard drive(s). |
Redundant Power Supply (for RP model) | |
Temperature | |
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 |
Others | |
System Fan | 60 mm x 60 mm x 4 pcs |
Easy Replacement System Fan | |
Noise Level* |
60.9 dB(A) |
Certification |
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Warranty | 5 Years |
Environment & Packaging | |
Environment | RoHS Compliant |
Packaging Content |
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Optional Accessories | Synology Rail Kit Sliding - RKS1317 |