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Silver 2U rackmount chassis with twelve front drive bays and rear dual power supplies

Synology Inc.

Synology Inc. SA6400 12-Bay Rackmount NAS

SKU CH-N9NZ-GAKEN MPN SA6400

A 12-bay 2U rackmount NAS supporting up to 108 drives with expansion and delivering over 6,500/4,000 MB/s sequential throughput

  • Form factorRackmount 2U
  • LAN ports• 1 × 1GbE RJ-45 (out-of-band management and data transfer)
  • USB ports2 x USB 3.2 Gen 1 ports
  • Protocol supportSMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP
  • Power detailsAC input power voltage :100 V to 240 V AC
  • Temperature rangeOperating Temperature : 0 °C to 35 °C (32 °F to 95 °F) Stora
  • Scales to 1.944 PB raw capacity with eight RX1223RP expansion units
  • Delivers 6,500 MB/s sequential read and 4,000 MB/s write throughput
  • Includes dedicated 1 GbE out-of-band management plus four 1 GbE and two 10 GbE data ports
  • Redundant power supplies maintain uptime during single-module failure
  • Operates reliably from 0 °C to 35 °C with 8 % to 80 % humidity

Scalable 12-Bay Rackmount Storage

The Synology SA6400 is a diskless 2U rackmount NAS built for organisations that need on-demand capacity growth. It supports up to 108 drives when paired with RX1223RP expansion units, reaching a raw potential of 1.944 PB. This platform suits enterprise data centres, media production studios and growing businesses in retail or hospitality that require a dense, centrally managed storage foundation.

Expansion Units and Redundant Power

Each RX1223RP unit adds twelve bays and the system can connect up to eight of them, multiplying the original bay count by nine. The bundled accessory pack includes two AC power cords for the redundant power supplies, enabling continuous operation if one supply fails. A Quick Installation Guide covers the initial rack mounting and cabling steps so the array can enter production quickly.

High-Density Connectivity and Remote Management

The rear panel provides one dedicated 1GbE RJ-45 port for out-of-band management, four 1GbE RJ-45 ports and two 10GbE RJ-45 ports for data traffic, plus two USB 3.2 Gen 1 ports for external devices. OOB access allows remote power control, forced restarts and log inspection even when the main network is down. The chassis measures 34.96 x 25.43 x 7.28 inches and weighs 46.63 lbs, fitting standard 2U rack space while operating between 0 and 35 °C.

How it compares

Measured against everything we stock in Rack-Mounted NAS Servers, at today’s prices. Recalculated every night.

Price $8,374.99
Pricier than about 62% of the 763 comparable items (median $6,564.99).

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Specifications

Product
Brand nameSynology
Model nameSA6400
Connectivity
Protocol supportSMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, and VPN (PPTP, OpenVPN™, L2TP)
Ports & slots
LAN ports• 1 × 1GbE RJ-45 (out-of-band management and data transfer)
• 4 × 1GbE RJ-45 (data transfer)
• 2 × 10GbE RJ-45
USB ports2 x USB 3.2 Gen 1 ports
Power
Power detailsAC input power voltage :100 V to 240 V AC
Size & build
Form factorRackmount 2U
Product dimensions34.96 in × 25.43 in × 7.28 in
Product weight46.63 lb (21.2 kg)
Shipping weight23.13 kg
Package size914 × 686 × 254 mm
In the box
In the box• 1 x SA6400 main unit
• 1 x Quick Installation Guide
• 1 x Accessory pack
• 2 x AC power cord
Environment & compliance
Temperature rangeOperating Temperature : 0 °C to 35 °C (32 °F to 95 °F)
Storage Temperature : -20 °C to 60 °C (-5 °F to 140 °F)
Humidity rangeOperating Relative humidity: 8% to 80% RH
Storage Relative humidity: 5% to 95% RH

Questions about this item

How many RX1223RP expansion units can I add to the SA6400 before I hit the drive limit?

You can connect up to eight RX1223RP units, giving a maximum of 108 drive bays and 1.944 PB of raw capacity.

What is the sequential read speed of the SA6400 before any expansion units are attached?

The base unit delivers over 6,500 MB/s sequential read and 4,000 MB/s sequential write throughput.

How much power does the SA6400 draw from a 100–240 V AC supply when fully populated and running continuously?

The unit operates on 100 V to 240 V AC input; redundant power supplies are built in for continuous operation.

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