TeraStation™ WS5420RN

WSS 2016 Rackmount with 10GbE - 4-Bay Business NAS

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TeraStation™ WS5420RN

WSS 2016 Rackmount with 10GbE – 4-Bay Business NAS

Buffalo’s TeraStation™ rackmount unit with Windows Storage Server 2016 (WS5420RNS6) combines four hard drives, high-performance network attached storage with the power and convenience of Windows operating system, fully populated with high-reliability HDD drives. This specialized operating system helps with simple deployment and management of your growing storage demands to integrate seamlessly with your existing Windows-based environment. WS5420RNS6 is an ideal solution for consolidating multiple file servers into a single solution that enables cost reduction and lowering the overhead on your existing servers for other workloads. It comes equipped with the powerful Intel® Atom™ Dual-Core 1.56Ghz family Processor and 8GB of fast ECC DDR4 memory installed and is designed to guard against failures and prevent downtime with four hot-swappable drives. Buffalo’s new WSS rackmount model is available with total capacities of 16 or 32TB. It means an upgrade of our current WS5400RRS2 with its 10GbE LAN interface, meaning a high-speed connection and the latest OS (Windows Storage Server 2016).

CPU Speed




Number of Bays


Supported RAID Levels

JBOD, 0/1/5/JBOD (Individual Disks)

High transmission speed

The 10GbE connectivity impresses with exceptional speed.

Rsynch Feature

Users can make backup copies from TeraStation to a rsync-compatible device from another manufacturer. This function also allows backups to be made from another manufacturer’s rsync-compatible NAS to the TeraStation NAS.


With this device you are supported by VMware if you have an ESX problem because this NAS device is VM-ready for NFS and iSCSI.

Active Directory

TeraStation functions as a client of an Active Directory domain, so that domain users and groups can be used. This means that they can be used in domain environments of companies with up to 10,000 users and groups.

Hot-swap function increases data security

With the hot swap function, the TeraStation™ automatically switches off the defective hard disk even if one hard disk fails, so that it can be replaced safely without interrupting work or losing data.


Buffalo’s TeraStation Series features B-Sync, which allows users to easily synchronize files between their TeraStation and Dropbox and make backups. The Buffalo NAS also supports Amazon S3 Cloud Services.

Including Buffalo VIP service

Replacement of defective hard disks within 24 hours

If you want to replace a defective hard disk, just let us know. If your order is in the system before 12 noon and the hard drives are in stock, they will be replaced within 24 hours. Applies within the 3 year warranty for each TeraStation and LinkStation NVR sold in the EU. (Outside the EU it can take longer).

More info

Intuitive web management interface

The web interface has a dashboard that offers the user more effective views of system status, the ability to resize windows (even on the phone) and a more comfortable button layout.

iSCSI target support

Works simultaneously as NAS and iSCSI target.

3 year warranty

This product has a standard warranty of 3 years. Check for other possibilities of warranty extension.

Replication with TeraStation

By replication, a folder in two separate TeraStations™ is synchronized almost in real time. This only happens in one direction (not bi-directional) – from the source to the destination. This function can be set up in LAN and WAN. WAN setup includes remote connection via port forwarding and VPN setup.

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Equipped with reliable NAS HDDs

This series is completely equipped with special NAS hard drives – for even more performance and reliability in RAID and continuous operation.

Enjoy the benefits of WSS 2016 NAS

Windows Server 2016 Standard provides a simple and cost-effective enterprise-class solution that is application- and user-oriented. With Windows Server 2016 Standard, you can leverage your data center capacity, deliver world-class performance for your Microsoft workloads, and achieve affordable business continuity scenarios with multiple networks and high service availability and disaster recovery at the highest level. Included Features: Data deduplication, Azure backup, instant synchronization with Windows 10 clients, Resilient File System (ReFS) and more.

Hardware System

Form factor
CPU Type
Intel Atom C3338
CPU Speed
Drive Interface
SATA 3.0 (6Gb/s)
Installed OS
Windows Storage Server 2016
OS Version
WSS 2016 Standard Edition
Included user licenses
No CAL (Client-Access Licenses) required.

Internal Hard Drives

Type of Drive
Number of Bays
Total Capacity
16TB, 32TB

LAN Interface

Connector Type
LAN Ports
1 x 10GbE, 2 x 1GbE
Max Transmission Rate
2x 10/100/1000Mbps, 1x 100/1000Mbps / 2.5/5/10Gbps

USB Interface

Connector Type
USB 3.0 Type A
USB 2.0 Ports
USB 3.0 Ports
Max Transmission Rate
Max: 5 Gb/s


Client OS
Windows 10 / 8.1 / 8 / 7, Server 2008/R2 / 2012/R2 / 2016, Mac OS 10.11 - 10.13
Standard Warranty 3 years, 24 hour HDD exchange, Technical Support Hotline
Power Consumption (max.)
100 W

Software System

Supported RAID Levels
JBOD, 0/1/5/JBOD (Individual Disks)

Protocol Support

File Sharing
Protocol Support
Active Directory support
Active Directory users


Realtime Backup
DFS replication
Backup Software Licenses
11 licenses NovaBACKUP Buffalo Edition for Windows Clients: 1 server license, 10 PC licenses
Cloud Support
Microsoft Azure, compatible 3rd party tools

Remote Access

Web UI

Product Part Numbers

Product Code
WS5420RN16S6EU - 16TB, WS5420RN32S6EU - 32TB
1TB = 1, 000, 000, 000, 000Bytes. Actual data throughput will vary depending upon environment factor.
Manuals / Setup / Latest Product Information
Documentation & Software --
NAS Navigator Intel Mac 10.9 or later --
NAS Navigator Windows --