BUFFALO TS5420DN4002 – TeraStation 5020 40TB 4-Bay 10GbE NAS
Overview
The BUFFALO TS5420DN4002 is a TeraStation 5020 Series 4-bay desktop NAS configured with 40TB of total installed capacity using two 20TB NAS-grade hard drives. The chassis provides two additional drive bays for storage expansion and supports RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, and JBOD configurations.
Designed for business storage environments, the TS5420DN4002 combines 10GbE connectivity with two additional Gigabit Ethernet ports, providing network interfaces for high-speed file access and conventional Gigabit infrastructure.
Technical Information
The system uses an Annapurna Labs Alpine AL524 processor running at 2.04GHz with four CPU cores and 8GB of DDR4 memory. Network connectivity consists of one 10GbE RJ-45 port and two 1GbE RJ-45 ports. Supported network file services include CIFS/SMB, AFP, FTP, FTPS, SFTP, and NFS.
The TS5420DN4002 supports snapshots, remote configuration, and abnormal file activity detection. Its storage architecture uses SATA III 6Gbps drive interfaces, while two USB 3.2 ports and two USB 2.0 ports provide peripheral connectivity.
Compatibility
The TS5420DN4002 supports 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 macOS 10.9 or later according to Buffalo's TS5020 Series specifications.
Compatible Buffalo hard-drive options for the TS5420DN family include the OP-HDN Series and OP-HDHU2 Series. The four-bay chassis can operate with the two installed drives while leaving two bays available for additional compatible drives.
Key Features
- 40TB total capacity with two included 20TB NAS-grade hard drives
- Four-bay desktop chassis with two open bays for expansion
- One 10GbE RJ-45 port plus two 1GbE RJ-45 ports
- Annapurna Labs AL524 2.04GHz quad-core processor with 8GB DDR4 memory
- RAID 0/1/5/6/10 and JBOD support with snapshot capability
Applications
- Business file and document storage
- Centralized network storage for office environments
- High-speed storage access over 10GbE networks
- Backup and data consolidation deployments
- Expandable four-bay NAS installations
DC Supplies Product Note
The TS5420DN4002 is supplied with two 20TB drives in a four-bay chassis, leaving two bays available for future expansion. A RAID 1 configuration uses mirrored copies of the installed data and therefore provides 20TB of usable capacity from the 40TB raw drive total.
Specifications
| Specification | Details |
|---|
| Brand | BUFFALO |
| Part Number / MPN | TS5420DN4002 |
| Product Type | Desktop NAS |
| Series | TeraStation 5020 |
| Drive Bays | 4 |
| Included Drives | 2 × 20TB |
| Total Installed Capacity | 40TB |
| Drive Type | NAS Grade HDD |
| Drive Interface | SATA III 6Gbps |
| Supported RAID | RAID 0 / 1 / 5 / 6 / 10 / JBOD |
| Processor | Annapurna Labs Alpine AL524, 2.04GHz Quad-Core |
| Memory | 8GB DDR4 |
| Network Ports | 1 × 10GbE, 2 × 1GbE |
| Network Connector | RJ-45 |
| Network Protocol | TCP/IP |
| File Services | CIFS/SMB, AFP, FTP, FTPS, SFTP, NFS |
| USB Ports | 2 × USB 3.2, 2 × USB 2.0 |
| Snapshots | Supported |
| SSD Caching | Not supported |
| Maximum Power Consumption | 100W |
| Power Supply | Internal AC 100–240V, 50/60Hz |
| Operating Temperature | 0–40°C |
| Operating Humidity | 10–85% non-condensing |
| Dimensions | 9.06 × 6.69 × 8.46 in |
| Product Weight | 12.41 lb |
| Warranty | 3 years |
FAQs
How much storage is included with the TS5420DN4002?
The TS5420DN4002 includes two 20TB drives for 40TB of total installed raw capacity.
How many drive bays does the TS5420DN4002 have?
It has four drive bays. The 40TB configuration uses two bays, leaving two bays available for expansion.
What RAID levels are supported?
The TS5420DN4002 supports RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, and JBOD.
What network connections are available?
The NAS provides one 10GbE RJ-45 port and two 1GbE RJ-45 ports.
Does the TS5420DN4002 support snapshots?
Yes. Buffalo specifies snapshot support for the TS5420DN 4-bay platform.
