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Buffalo WS5420RN48W5 TeraStation 4-Bay Rackmount NAS - 48TB - 4 x 12TB HDD - Windows Server IoT 2025 - Intel Atom C3338 - 8GB DDR4 - 10GbE
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Product Features
Technical Overview
Storage Architecture
The system features four hot-swappable drive bays, each populated with a 12TB SATA/600 hard drive for a total installed capacity of 48TB. The integrated RAID controller supports levels 0, 1, 5, and JBOD, providing flexibility for performance, redundancy, or capacity optimization based on your storage strategy.
- All four bays are pre-populated with drives
- SATA/600 interface ensures reliable data throughput
- Hardware RAID support for data protection
Processing and Memory
Powered by an Intel Atom C3338 dual-core processor running at 1.5 GHz, this TeraStation handles file serving, backup tasks, and lightweight virtualization workloads efficiently. The 8GB of DDR4 SDRAM provides ample memory for operating system operations and caching, supporting smooth performance in multi-user environments.
- Intel Atom C3338 CPU balances power and efficiency
- 8GB DDR4 RAM for responsive system operation
- Dual-core design optimized for storage-centric tasks
Key Product Advantages
This TeraStation combines out-of-the-box readiness with advanced features that reduce operational complexity and total cost of ownership. The inclusion of Windows Server IoT 2025 provides a familiar, powerful environment for data management, while the lack of CAL requirements makes it a cost-effective solution for businesses of all sizes.
Virtualization and Cloud Readiness
With support for Hyper-V virtualization, you can consolidate workloads, improve hardware utilization, and enable secure remote access. Native integration with Microsoft Azure, OneDrive, and other cloud services allows for seamless hybrid cloud deployments, enhancing data resilience and accessibility.
- Run virtual machines directly on the NAS
- Integrate with Azure for hybrid cloud backups
- Streamline remote work with centralized storage
Comprehensive Data Protection
The system supports a wide array of backup and replication features, including Shadow Copy, Azure Backup, and iSCSI targets. These tools help safeguard critical data against loss, corruption, or ransomware, ensuring business continuity with minimal administrative effort.
- Multiple backup options including cloud and local
- iSCSI support for block-level storage
- Snapshot capabilities for point-in-time recovery
Deployment / Use Cases
The WS5420RN48W5 is engineered for scenarios where reliable, high-capacity storage and compliance are non-negotiable. Its rackmount design and full drive population make it ideal for deployment in standard server racks, while its networking capabilities support demanding file-sharing environments.
Common use cases include departmental file servers, backup targets for virtualized infrastructure, and primary storage for small to medium-sized businesses. The TAA compliance also makes it suitable for government contracts and educational institutions requiring adherence to specific procurement regulations.
Business File Services
Serve as a central repository for documents, databases, and multimedia files, accessible via SMB, NFS, AFP, and FTP protocols. The 10GbE networking ensures fast data transfer for collaborative teams and bandwidth-intensive applications.
Virtualization Storage
Provide shared storage for Hyper-V or other virtualization platforms, hosting virtual machine disks and enabling features like live migration. The RAID-protected array ensures uptime and data integrity for critical workloads.
Localization and Operating System
This Buffalo TeraStation WS5420RN48W5 is pre-installed with Windows Server IoT 2025, a specialized operating system designed for embedded and storage applications. This version provides the full functionality of Windows Server, including file sharing, Hyper-V virtualization, and Active Directory integration, without requiring separate Client Access Licenses (CALs). This makes it a cost-effective solution for businesses that need enterprise-grade data management features without additional licensing overhead.
The system supports a wide range of client operating systems, including Windows 11, Windows 10, Windows 8.1, Windows 7, Windows Server 2022, Windows Server 2019, Windows Server 2016, Windows Server 2012, Windows Server 2012 R2, and Mac OS X 10.12 Sierra. This broad compatibility ensures seamless integration into diverse IT environments, allowing users to access shared storage from various platforms without compatibility issues.
For localization, the operating system and management interface are configured in English, with support for standard protocols like CIFS/SMB, AFP, FTP, SFTP, and NFS to facilitate cross-platform file access. This setup is ideal for North American and international business deployments where English is the primary language for IT administration, ensuring straightforward setup and management for IT teams.
Windows Server IoT 2025 Benefits
This operating system delivers robust data management capabilities, including support for virtualization, cloud integration, and advanced backup features like Shadow Copy and Azure Backup. It eliminates CAL requirements, reducing total cost of ownership while providing a familiar Windows environment for administrators.
- No Client Access Licenses (CALs) needed
- Supports Hyper-V for virtualization workloads
- Integrates with Microsoft Azure for hybrid cloud
Physical Profile
Housed in a 1U rack-mountable chassis, this TeraStation measures 1.70 inches in height, 16.90 inches in width, and 16.90 inches in depth, fitting standard 19-inch server racks. The included rail kit with mounting brackets and screws simplifies installation, allowing for secure, tool-free mounting in data center environments. The compact form factor optimizes rack space while delivering substantial storage density.
- Width
- 16.90" (429.26 mm)
- Depth
- 16.90" (429.26 mm)
- Height
- 1.70" (43.18 mm)
What's in the Box
The package includes everything needed for immediate deployment and operation.
Highlights
- 48TB of installed storage across four 12TB hard drives
- Windows Server IoT 2025 operating system with no CAL requirements
- Intel Atom C3338 dual-core processor and 8GB DDR4 RAM
- 10 Gigabit Ethernet and Gigabit Ethernet ports for high-speed networking
- RAID 0, 1, 5, and JBOD support for data protection and flexibility
- TAA compliant and manufactured in Japan
- Includes rail kit for easy 1U rack mounting
- Supports virtualization, cloud integration, and multiple backup methods
Specifications
| Specifications | |
|---|---|
| Manufacturer | Buffalo Americas, Inc |
| Manufacturer Part Number | WS5420RN48W5 |
| Brand Name | Buffalo |
| Product Line | TeraStation |
| Product Series | WS5020 |
| Product Model | WS5420RN48W5 |
| Product Name | TeraStation WS5420RN48W5 SAN/NAS Storage System |
| Product Type | SAN/NAS Storage System |
| Storage | |
| Number of Hard Drives Supported | 4 |
| Number of Hard Drives Installed | 4 |
| Total Hard Drive Capacity Supported | 48 TB |
| Total Hard Drive Capacity Installed | 48 TB |
| Hard Drive Interface | Serial ATA/600 |
| Hard Drive Configuration | 4 x 12TB |
| Processor & Chipset | |
| Processor Manufacturer | Intel |
| Processor Type | Atom |
| Processor Model | C3338 |
| Processor Core | Dual-core (2 Core) |
| Processor Speed | 1.50 GHz |
| Memory | |
| Standard Memory | 8 GB |
| Memory Technology | DDR4 SDRAM |
| Network & Communication | |
| Ethernet Technology | 10 Gigabit Ethernet,Gigabit Ethernet |
| I/O Expansions | |
| Number of Total Expansion Bays | 4 |
| Controllers | |
| Controller Type | Serial ATA/600 |
| RAID Supported | Yes |
| RAID Levels | 0, 1, 5, JBOD |
| Interfaces/Ports | |
| Drive Interface | Serial ATA/600 |
| Total Number of USB Ports | 3 |
| Number of USB 3.2 Gen 1 Ports | 3 |
| Network (RJ-45) | Yes |
| Number of Network (RJ-45) Ports | 3 |
| Software | |
| Operating System | Windows Server IoT 2025 |
| Operating System Supported | Windows 11,Windows 10,Windows 10 x64,Windows 8.1,Windows 8.1 x64,Windows 7,Windows 7 x64,Windows Server 2022,Windows Server 2016,Windows Server 2019,Windows Server 2012,Windows Server 2012 R2,Mac OS X 10.12 Sierra,Windows 11 x64 |
| Management & Protocols | |
| Protocols | iSCSI,TCP/IP,CIFS/SMB,AFP,FTP,SFTP,NFS,SNMP |
| Physical Characteristics | |
| Height | 1.70" (43.18 mm) |
| Width | 16.90" (429.26 mm) |
| Depth | 16.90" (429.26 mm) |
| Form Factor | Rack-mountable |
| Miscellaneous | |
| Package Contents | TeraStation WS5420RN48W5 SAN/NAS Storage System AC Cable 6a Ethernet Cable Warranty Statement Quick Setup Guide Setup Media (SD Card) Rail Kit with Mounting Brackets and Screws |
| Country of Origin | Japan |
| TAA Compliant | Yes |
| Warranty | |
| Limited Warranty | 3 Year |
FAQ
What processor does this product use?
This product uses the Intel processor for everyday performance and multitasking.
How much memory is installed?
It includes 8 GB of memory to support responsive multitasking and daily workloads.
What storage is included?
The system includes 4 of storage for applications, files, and everyday business data.
What graphics or display support is listed?
Display-related specifications help position BUFFALO TeraStation WS5420RN 4-Bay Windows Server IoT 2025 Rackmount NAS 48TB (4x12TB) HDD Included TAA Compliant - Intel Atom C3338 - (WS5420RN48W5) for the kind of viewing experience, readability, and workspace fit buyers may expect in business it/storage arrays & nas/nas storage system deployments.
What connectivity options are available?
Connectivity options include 10 Gigabit Ethernet,Gigabit Ethernet, helping the product integrate into common office or home setups.
What operating system or platform is included?
The included operating environment is Windows Server IoT 2025, which helps position the product for software compatibility, deployment planning, and day-to-day business use.
| Qty | Price | Available |
|---|
