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WD 12TB Ultrastar DC HC520 SATA HDD 7200 RPM Class SATA 6 Gb/s 256MB Cache 3.5"
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WD 12TB Ultrastar DC HC520 SATA HDD 7200 RPM Class SATA 6 Gb/s 256MB Cache 3.5"

JOD279.000
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The Western Digital 12TB Ultrastar DC HC520 SATA HDD is an enterprise-grade drive featuring HelioSeal® technology, 7200 RPM speed, and a 256MB cache. Built for 24/7 operation, it supports up to 550TB/year workloads, delivering exceptional reliability, efficiency, and performance for data centers and server storage applications.

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Western Digital 12TB Ultrastar DC HC520 SATA HDD 7200 RPM Class SATA 6Gb/s 256MB Cache 3.5"


The Western Digital 12TB Ultrastar DC HC520 SATA HDD is an enterprise-class hard drive built for data centers, cloud storage, and high-performance servers that require maximum reliability, capacity, and efficiency. Utilizing HelioSeal® technology, it delivers exceptional power efficiency, low vibration, and superior reliability for continuous 24/7 workloads.

With a 7200 RPM spindle speed and 256MB cache, the Ultrastar DC HC520 ensures fast data access, consistent throughput, and stable performance under heavy workloads. Engineered to handle up to 550TB per year, it is ideal for mission-critical applications such as object storage, backup systems, and high-capacity RAID arrays.

Designed for long-term reliability, the Ultrastar DC HC520 features Rotational Vibration Safeguard (RVS), Advanced Format (AF) for improved error correction, and a robust 2.5 million-hour MTBF rating. It’s a proven choice for enterprise environments where data integrity and uptime are essential.

Main Features

  • Enterprise-Grade Performance: Designed for 24/7 operation in demanding data center and server applications.
  • HelioSeal® Technology: Reduces internal friction and improves power efficiency while maintaining high capacity.
  • High Workload Capability: Supports up to 550TB per year workload for mission-critical environments.
  • 7200 RPM Class Speed: Ensures high data transfer rates and consistent performance.
  • 256MB Cache: Boosts performance for intensive read/write operations.
  • Rotational Vibration Safeguard (RVS): Maintains reliability in multi-drive server racks.
  • Energy Efficient & Reliable: Designed for optimal performance with reduced power consumption.

Specifications

  • Model: HUH721212ALE600
  • Form Factor: 3.5 inch
  • Interface: SATA 6Gb/s
  • Capacity: 12TB
  • Spindle Speed: 7200 RPM Class
  • Cache: 256MB
  • Workload Rate: Up to 550TB per year
  • Technology: HelioSeal® Design
  • Sector Size: 512e / 4Kn Advanced Format
  • MTBF: 2.5 million hours
  • Vibration (Operating): 0.67G (5–500Hz)
  • Vibration (Non-Operating): 1.04G (2–200Hz)
  • Operating Temperature: 5°C to 60°C
  • Non-Operating Temperature: -40°C to 70°C
  • Power Consumption (Active): 7.8W (typical)
  • Noise Level: 29 dBA (idle), 36 dBA (seek)
  • Warranty: 5-year limited warranty

Package Includes

  • 1 × Western Digital 12TB Ultrastar DC HC520 SATA HDD
  • 1 × Quick Installation Guide
  • Warranty & Support Information

*Performance and specifications may vary depending on system configuration and workload. The Ultrastar DC HC520 is intended for enterprise and data center use and is not recommended for consumer desktop environments.

Data sheet

Model
HUH721212ALE600
Brand
Western Digital

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