|   Hardware 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.
  - 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.
  - DSM version requirement: 6.2.3-25426-2 or later version.
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  |   Storage   |  Drive Bays |  24 |  
   |  Drive Type (See all supported drives)  |    - 2.5" SAS HDD
  - 2.5" SAS SSD
  - 2.5" SATA SSD
     |  
   |  Hot Swappable Drive* |   |  
   |  RAID Management through Synology DSM |   |  
   |  Notes |    - Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
  - "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   |  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 - RKS-02) |  
   |  Notes |  The rail kit is sold separately |  
  |   Power   |  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)   |  
   |  British Thermal Unit |  651.68 BTU/hr (Access)   |  
   |  Redundant Power Supply |   |  
   |  Notes |  Power consumption is measured when it is fully loaded with HGST 1.8TB HUC101818CS4204 hard drive(s). |  
  |   Temperature   |  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 |  
  |   Others   |  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% |  
  |   Certification   |    - UL
  - FCC
  - CE
  - EAC
  - VCCI
  - RCM
  - KC
     |  
  |   Warranty   |  5 Years |  
   |  Notes |  The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)  |  
  |   Environment & 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
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  |   Optional Accessories   |     |