FX2421 - Synology 24 BAY EXPANSION FLASHEXPANSION | Aztek Computers
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SKU: NEJV6AB8OR |  Mfg. Part: FX2421  | UPC: 846504004010  | 
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FX2421 - Synology 24 BAY EXPANSION FLASHEXPANSION

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Product Overview

SYNOLOGY 24 BAY EXPANSION FLASHEXPANSION

Expert Overview

The Synology FX2421 is a 24-bay flash expansion unit designed for businesses requiring high-density storage capacity and performance. This unit integrates with specific Synology FS series NAS models, including the FS6400, FS3600, and FS3400, provided the NAS runs DSM version 6.2.3-25426-2 or later. It supports 2.5" SAS HDDs, SAS SSDs, and SATA SSDs, offering a maximum internal raw capacity of 92.16 TB when populated with 3.84 TB drives. All drive bays are hot-swappable, and RAID management is handled through Synology DSM. The FX2421 is intended for organizations looking to expand their existing Synology flash storage infrastructure, addressing needs for increased data volume within a rack-mounted environment. It includes redundant power supplies and features an easy-replacement system fan for operational continuity. For optimal performance, it is recommended to create storage volumes physically within the same unit rather than spanning across the NAS and expansion unit.

Technical Specifications

Applied Models
Supports creating volumes across different units
FS series:FS6400, FS3600, FS3400
Notes
Expansion Unit FX2421 can only be used with identical expansion units.
DSM version requirement: 6.2.3-25426-2 or later version.
To have better performance, we recommend creating storage volumes physically located within the same NAS or Expansion Unit, rather than creating volumes across your NAS and Expansion Unit.
Storage
Drive Bays
24
Compatible Drive Type
2.5" SAS HDD
2.5" SAS SSD
2.5" SATA SSD
Maximum Internal Raw Capacity
92.16 TB (3.84 TB drive x 24) (Capacity may vary by RAID types)
Hot Swappable Drive
Yes
RAID Management through Synology DSM
Yes
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
1
SAS OUT-port
1
Appearance
Rack Installation Support
4-post 19" rack (Synology Rail Kit - RKS1317)
Notes
The rail kit is sold separately
Power
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
190.99 W (Access)
British Thermal Unit
651.68 BTU/hr (Access)
Redundant Power Supply (for RP model)
Yes
Notes
Power consumption is measured when it is fully loaded with HGST 1.8TB HUC101818CS4204 hard drive(s).
Temperature
Operating Temperature
0oC to 35oC (32oF to 95oF)
Storage Temperature
-20oC to 60oC (-5oF to 140oF)
Relative Humidity
5% to 95% RH
Others
System Fan
80 mm x 80 mm x 4 pcs
Easy Replacement System Fan
Yes
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: 24.25-25.75oC, Humidity: 58.2-61.8%
Certification
UL
Environment and Packaging
Environment
RoHS Compliant
Packaging Content
Main Unit X 1
Accessory Pack X 1
AC Power Cord X 2
Expansion Cable: MiniSAS-HD X 1
Quick Installation Guide X 1
Optional Accessories
2.5" SATA SSD: SAT5200
Rail Kit Sliding: RKS1317
Item Dimension (L"x W"x H")
28 x 17 x 4
Weight
31.97 LB
Warranty Information
5 Years

Product Details

  • Manufacturer:
  • Model Number:
  • ASIN:
  • UPC:
  • Condition:
  • Weight:
  • Dimensions:
  • Updated:
  • Added:
  • TAA Compliant:
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  • Available on GSA:
  • Synology
  • FX2421
  • B08FTKS6SG
  • 846504004010
  • New
  • 31.97 lbs
  • 27 X 3 X 17
  • Jul 25, 2026
  • Aug 29, 2020
  • Yes
  • TW
  • Yes
Product Identifiers: Brand: Synology • Part #: FX2421 • UPC: 846504004010 • ASIN: B08FTKS6SG • Category: Consumer Electronics • TAA Compliant

Frequently Asked Questions

Which Synology NAS models are compatible with the FX2421 expansion unit?

The FX2421 is compatible with Synology FS series models, specifically the FS6400, FS3600, and FS3400. It requires DSM version 6.2.3-25426-2 or later on the connected NAS.

What types of drives can be installed in this expansion unit?

The unit supports 2.5" SAS HDDs, 2.5" SAS SSDs, and 2.5" SATA SSDs. All 24 drive bays are hot-swappable for convenient maintenance.

What is the maximum storage capacity of the FX2421?

The maximum internal raw capacity is 92.16 TB, achieved by populating all 24 bays with 3.84 TB drives. Actual usable capacity may vary based on RAID configuration.

What is included in the product packaging?

The packaging includes the main unit, an accessory pack, two AC power cords, one MiniSAS-HD expansion cable, and a quick installation guide. A rail kit for rack installation is sold separately.

FX2421 - Synology 24 BAY EXPANSION FLASHEXPANSION

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