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The Western Digital Ultrastar® DC HA340 8TB is built for enterprise-grade workloads, combining high performance with consistent 24/7 reliability. Featuring CMR (Conventional Magnetic Recording) and a 7200 RPM spindle speed, it delivers strong throughput and endurance for cloud storage, backup, and scale-out server environments.
Designed with air-based drive architecture, this 3.5-inch SATA HDD balances power efficiency with enterprise durability. With advanced vibration tolerance and sustained transfer speeds of up to 267MB/s, it’s ideal for high-density deployments that demand both capacity and speed.
Whether you're running backup servers or managing enterprise storage clusters, the Ultrastar DC HA340 8TB is built to handle demanding data loads with efficiency and confidence.
| Attribute | Specification |
|---|---|
| Model Number | WUS721208BLE604 / WUS721208BLE6L4 |
| Form Factor | 3.5-inch |
| Recording Technology | CMR (Conventional Magnetic Recording) |
| Drive Technology | Air |
| Interface | SATA 6 Gb/s |
| Sector Format | 512e |
| Areal Density | 1022 Gbits/in² |
| RoHS Compliant | Yes |
| Data Cache | 256 MB |
| Rotational Speed | 7200 RPM |
| Average Latency | 4.16 ms |
| Internal Transfer Rate | 6 Gb/s (max) |
| Sustained Transfer Rate | 267 MB/s (max) / 255 MiB/s |
| Random Read / Write IOPS | 154 / 425 (4K, QD16) |
| MTBF | 2,000,000 hours (projected) |
| Annualized Failure Rate (AFR) | 0.44% |
| Load/Unload Cycles | 600,000 |
| Non-Recoverable Error Rate | <1 in 1015 bits read |
| Availability | 24x7 |
| Workload Rating | Up to 550TB/year |
| Warranty | 5 years |
| Power - Operating (Typical) | 8.0 W |
| Power - Idle | 6.7 W |
| Power Efficiency at Idle | 0.84 W/TB |
| Shock - Operating | 70G (2ms) |
| Shock - Non-Operating | 300G (2ms) |
| Temperature - Operating | 5°C to 60°C |
| Temperature - Non-Operating | -40°C to 70°C |
| Vibration - Operating | 0.67G RMS (5–500 Hz) |
| Vibration - Non-Operating | 1.04G RMS (2–200 Hz) |
| Acoustic (Idle / Operating) | 2.9 / 3.6 Bels |
| Dimensions (H x L x W) | 1.028 in x 5.787 in x 4.0 in (26.1 mm x 147 mm x 101.6 mm) |
| Weight | 1.58 lb (715 g) ±10% |
| Country of Assembly | Thailand |
