Product Type | Hard Drive |
Form Factor | 3.5-inch |
Storage Capacity | 4 TB |
Compatible Devices | BUFFALO DriveStation Duo HD-WHTU3R1 series |
Rotational Speed | 5400 RPM |
Drive Technology | Conventional Magnetic Recording (CMR) |
Cache Size | 128 MB |
Spindle Type | Single |
Power Requirements | DC 12V (via host enclosure) |
Hot-Swap Support | Yes |
BUFFALO 4 TB Replacement Hard Drive OP-HD4.0WH




Key Benefits

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- 4 TB capacity offers ample space for large data sets, ideal for professional media or backup applications.
- TAA-compliant and Japan-manufactured, ensuring regulatory suitability and trusted component sourcing.
- Specifically designed for Buffalo’s DriveStation Duo HD-WHTU3R1 series, ensuring seamless compatibility and performance.
Product Overview
The BUFFALO OP-HD4.0WH is a 4 TB replacement hard drive crafted for the DriveStation Duo HD-WHTU3R1 series, offering reliable and high-capacity storage in a compact footprint. At just 5.8 x 4 x 1.1 inches, it integrates easily into professional storage arrays. Manufactured in Japan and with TAA compliance, it meets strict procurement standards for government and institutional buyers. This drive is optimized for those already using Buffalo’s storage systems, supporting quick replacement for reduced downtime and continued RAID performance.
Specifications
Product Overview
Physical & Environmental
Width | 5.8 inch |
Depth | 4 inch |
Height | 1.1 inch |
Weight | 1.52 lbs (approx) |
Operating Temperature | 5°C to 50°C (41°F to 122°F) |
Storage Temperature | -20°C to 60°C (-4°F to 140°F) |
Operating Humidity | 20% to 80% (non-condensing) |
Storage Humidity | 5% to 90% (non-condensing) |
Shock Resistance (Operating) | 65 G, 2 ms |
Shock Resistance (Non-operating) | 250 G, 2 ms |
Acoustic Noise - Idle | 2.3 bels |
Acoustic Noise - Seek | 2.5 bels |
Cloud Management & Licensing
Cloud Management Support | No |
Bundled Software | None (uses host RAID controller) |
Interfaces
Interface Type | SATA III |
Interface Speed | 6 Gbps |
Compliance & Origin
Country of Origin | Japan |
TAA Compliant | Yes |
RoHS Compliance | Yes |
Environmental Standards | Halogen Free |
Certifications | CE, FCC, VCCI |
Advanced Security Features
Encryption Support | Depends on host enclosure |
Secure Erase Support | Yes |
Reliability Rating (MTBF) | 1,000,000 hours |
Workload Rate Limit (WRL) | 180 TB/year |