Synology FlashStation FX2421 DAS Storage System

$4,238.99
1 availableas of 09/18/2026

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  • Origin: Taiwan
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Secure checkoutISO 9001:2015 and CMMC certifiedFamily owned since 1982

Free shipping on most items when you spend $100 or more.

Real people answer: chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.

Overview

About the Synology FlashStation FX2421

View user manual
On-the-Fly Storage Capacity Expansion for Synology FlashStation

Synology FX2421 expansion units for Synology FlashStation make it easy to upgrade your allflash storage space with Synology enterprise SSD. Each 2U rackmount unit lets you add 24 additional 2.5" drive bays on the fly using an expansion cable. Synology FX2421 is the first 24 bay expansion unit to support Synology's SAT5200 SATA SSD, allowing you to create a highly reliable and integrated storage setup, and receive long-term Synology updates and support. Synology FX2421 is backed by Synology's 5-year limited warranty

High-Density Unit for Easy Expansion and Backup

It is easy to 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 any 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 SAT5200 SATA SSD, developed in tandem with FX2421, provides proven interoperability and high reliability through rigorous validation and compatibility testing with Synology Expansion Units. Synology's SAT5200 solid state drive delivers up to 67,000 4K random write IOPS and enterprise-grade endurance at 1.3 DWPD. 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.

Backed by Synology's 5-Year Limited Warranty

Synology FX2421 is designed to keep your data durably safe and is backed by Synology's 5-year limited warranty, which includes hardware replacement and technical support for maximum return on investment.

Technical specifications

Technical Specifications of the Synology FlashStation FX2421

General Information

General Information specifications
Manufacturer Synology, Inc
Manufacturer Part Number FX2421
Manufacturer Website Address http://www.synology.com
Brand Name Synology
Product Line FlashStation
Product Model FX2421
Product Name FlashStation FX2421 DAS Storage System
Packaged Quantity 1
Product Type DAS Storage System

Storage

Storage specifications
Number of Hard Drives Supported 24
Number of Solid State Drive Supported 24

I/O Expansions

I/O Expansions specifications
Number of Total Expansion Bays 24
Number of 2.5" Bays 24

Controllers

Controllers specifications
Controller Type Serial Attached SCSI (SAS)

Interfaces/Ports

Interfaces/Ports specifications
Host Interface SAS
Number of SAS Ports (External) 2

Physical Characteristics

Physical Characteristics specifications
Height 3.5"
Width 16.9"
Depth 27.2"
Form Factor Rack-mountable
Rack Height 2U
Weight (Approximate) 31.97 lb

Miscellaneous

Miscellaneous specifications
Country of Origin Taiwan

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Shipping and returns

Free shipping on most items when you spend $100 or more. In-stock items ship on the next open shipment slot. The buy box above shows the live order-by countdown and the estimated arrival date.

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Questions about shipping or returns? Chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.