Description, Specifications for WD Ultrastar 8TB HA340 Hard drive
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.
- 256MB cache for faster access to frequently used data
- 2 million-hour MTBF ensures long-term reliability
- 550TB/year workload rating suitable for heavy-duty environments
- Backed by a 5-year limited warranty
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.
Specifications – 8TB Ultrastar DC HA340
| 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 |
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