BUFFALO TS5420RN4804 – TeraStation 5020 48TB 4-Bay 1U Rackmount NAS
Overview
The BUFFALO TS5420RN4804 is a 4-bay, 1U rackmount NAS from the TeraStation 5020 series, configured with four 12TB NAS-dedicated hard drives for 48TB of total installed capacity. It is designed for business storage environments requiring centralized network file services, RAID protection, 10GbE connectivity, and a compact rackmount chassis.
Technical Information
The TS5420RN4804 uses an Annapurna Labs Alpine AL524 quad-core 64-bit processor operating at 2.04GHz with 8GB of DDR4 memory. Its four 3.5-inch SATA drive bays are populated with NAS-grade CMR hard drives and support RAID 0, 1, 5, 6, 10, and JBOD configurations. Buffalo specifies RAID 6 as the factory configuration.
Network connectivity consists of one 10GBASE-T RJ-45 port and two 1000BASE-T RJ-45 ports. The 10GbE interface supports 10Gbps, 5Gbps, 2.5Gbps, and 1Gbps operation, while the Gigabit interfaces support 1000Mbps, 100Mbps, and 10Mbps connectivity.
The platform supports SMB/CIFS, AFP, FTP, SFTP, NFS, HTTP/HTTPS, SNMP, iSCSI, and rsync functions. Buffalo also provides snapshot functionality and storage-management features intended for business backup, recovery, replication, and centralized data-storage deployments.
Compatibility
The TS5420RN4804 is intended for standard Ethernet network environments and can connect directly to compatible 10GbE or Gigabit Ethernet infrastructure. Its RJ-45 10GbE interface allows integration with copper-based 10GbE switches without requiring an SFP+ transceiver.
The four internal drive bays accommodate 3.5-inch SATA HDDs. The exact configuration includes four 12TB NAS-grade drives, with the installed storage factory configured for RAID 6. Buffalo identifies OP-HD12.0N as the compatible replacement drive for this model.
Key Features
- 48TB total installed capacity using four 12TB NAS-grade HDDs
- 4-bay 1U rackmount chassis for business network storage
- 1 × 10GBASE-T and 2 × 1000BASE-T RJ-45 network interfaces
- 8GB DDR4 ECC memory with Annapurna Labs AL524 quad-core processor
- RAID 6 factory configuration with support for RAID 0, 1, 5, 6, 10, and JBOD
Applications
- Business file and network storage
- Rackmount NAS deployments in server rooms and data centers
- 10GbE storage networks using copper Ethernet infrastructure
- Centralized SMB/CIFS, NFS, FTP, and SFTP file services
- iSCSI storage, backup, replication, and snapshot-based recovery environments
DC Supplies Product Note
The TS5420RN4804 is factory configured with four 12TB drives and RAID 6. Buffalo's exact-model RAID table specifies 24TB of effective capacity in RAID 6, 36TB in RAID 5, 24TB in RAID 10, 12TB in RAID 1, and 48TB in RAID 0. These figures are useful when planning usable storage versus raw installed capacity.
Specifications
| Specification | Details |
|---|
| Brand | BUFFALO |
| Part Number / MPN | TS5420RN4804 |
| Product Type | Rackmount NAS |
| Series | TeraStation 5020 / TeraStation 5420RN |
| Form Factor | 1U Rackmount |
| Total Installed Capacity | 48TB |
| Included Drives | 4 × 12TB NAS-grade HDD |
| Drive Bays | 4 × 3.5-inch |
| Drive Interface | SATA III |
| Default RAID | RAID 6 |
| Supported RAID | RAID 0, 1, 5, 6, 10, JBOD |
| RAID 6 Effective Capacity | 24TB |
| RAID 5 Effective Capacity | 36TB |
| RAID 10 Effective Capacity | 24TB |
| RAID 1 Effective Capacity | 12TB |
| RAID 0 Effective Capacity | 48TB |
| CPU | Annapurna Labs Alpine AL524, 2.04GHz, Quad-Core 64-bit |
| Memory | 8GB DDR4 ECC |
| 10GbE | 1 × 10GBASE-T RJ-45 |
| Gigabit Ethernet | 2 × 1000BASE-T RJ-45 |
| USB | 2 × USB 3.0 Type-A; 2 × USB 2.0 Type-A |
| Network Protocols | SMB/CIFS, AFP, FTP, SFTP, NFS, HTTP/HTTPS, SNMP, iSCSI, rsync |
| Snapshots | Supported |
| Power Input | AC 100–240V, 50/60Hz |
| Maximum Power Consumption | 100W |
| Data Transfer Power Consumption | 75W |
| Idle Power Consumption | 63W |
| Operating Temperature | 0–40°C |
| Operating Humidity | 10–85% non-condensing |
| Dimensions | 430 × 44.3 × 430mm (W × H × D) |
| Compatible Replacement Drive | OP-HD12.0N |
| Warranty | 3 years |
| Country of Origin | Japan |
FAQs
What is the storage capacity of the BUFFALO TS5420RN4804?
The TS5420RN4804 has 48TB of total installed capacity using four 12TB NAS-grade hard drives.
What RAID mode does the TS5420RN4804 use by default?
Buffalo specifies RAID 6 as the factory configuration. The exact-model RAID table lists 24TB of effective capacity in RAID 6.
Does the TS5420RN4804 support 10GbE?
Yes. The NAS provides one 10GBASE-T RJ-45 port along with two 1000BASE-T RJ-45 ports.
How much memory does the TS5420RN4804 have?
The system is equipped with 8GB of DDR4 ECC memory.
Which replacement hard drive is specified for the TS5420RN4804?
Buffalo identifies the OP-HD12.0N as the compatible replacement drive for the 12TB configuration used in this model.
