Description & Specifications
24-bay 2.5' expansion unit for Synology FlashStation
Expand your Synology FlashStation with Expansion Unit FX2421 for 24 additional 2.5” drive bays whenever needed. Without additional software configuration, FX2421 is immediately ready for use when connected to Synology FlashStation. FX2421 expansion units can also be used as a dedicated and rapidly accessible local backup destination.
Expand FlashStation with Synology SAT5200 SSD
Synology enterprise-grade SAT5200 SATA SSD, developed in tandem with FX2421, provides proven interoperability and high reliability through rigorous validation and compatibility testing with Synology expansion units. Combine SAT5200 drives with Synology FlashStation and FX2421 for a highly reliable and integrated storage setup, and receive long-term Synology updates and support.
High-performance data transmission
The high-speed expansion cable provided with FX2421 enables high bandwidth connectivity for maximum data throughput between your Synology FlashStation and Expansion Unit. Drives in FX2421 operate with minimum data latency, as if installed directly on your Synology FlashStation, allowing you to take advantage of high SSD I/O performance.
High-reliability design, easy hardware setup
The FX2421 is a highly reliable and thoroughly tested expansion unit that comes with hot-swappable drive trays and modularized components. Redundant power supplies and system fans can be replaced with ease to ensure maximum service uptime. The optional RKS1317 sliding rail kit provides fast rack fixing lock support for quick and secure rack cabinet installation.
5-year warranty
At Synology, we are committed to product innovation and quality. Synology guarantees a robust and reliable data management experience with a 5-year limited warranty, providing responsive technical support and hardware replacement services to maximize your 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 continuity. .
Notes:
- View specifications for a list of supported models.
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Hardware Specifications
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Applied Models
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Applied Models
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Supports creating volumes across different units |
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Storage
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Storage
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Drive Bays | 24 |
| Compatible Drive Type* |
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| Maximum Internal Raw Capacity | 92.16 TB (3.84 TB drive x 24) (Capacity may vary by RAID types) | |
| Hot Swappable Drive | ||
| RAID Management through Synology DSM | ||
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External Ports
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External Ports
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SAS IN-port | 1 |
| SAS OUT-port | 1 | |
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Appearance
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Appearance
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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 | 14.5 kg | |
| Rack Installation Support* | 4-post 19' rack (Synology Rail Kit - ) | |
| Notes | The rail kit is sold separately | |
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Power
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Power
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Power Supply Unit / Adapter | 500 W |
| AC Input Power Voltage | 100V to 240V AC | |
| Power Frequency | 50/60 Hz, Single Phase | |
| Power Consumption* |
190.99 W (Access)
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| British Thermal Unit |
651.68 BTU/hr (Access)
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| Redundant Power Supply (for RP model) | ||
| Notes | Power consumption is measured when it is fully loaded with HGST 1.8TB HUC101818CS4204 hard drive(s). | |
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Temperature
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Temperature
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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 | |
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Others
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Others
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System Fan | 80 mm x 80 mm x 4 pcs |
| Easy Replacement System Fan | ||
| Noise Level* | 57 dB(A) | |
| Notes | Noise Level Testing Environment: Fully loaded with Toshiba 600GB AL14SEB060N hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8% | |
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Certification
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Certification
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Warranty
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Warranty
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5 Years | |
| Notes | The warranty period starts from the purchase date as stated on your purchase receipt. | |
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Environment & Packaging
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Environment
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Environment
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RoHS Compliant | |
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Packaging Content
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Packaging Content
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Notes:
- Model specifications are subject to change without prior notice.
- The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.
- The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.
- If usage requirements exceed the specifications above, please contact our for professional advice.
