Western Digital

Western Digital Ultrastar DC HC520 12TB SATA HDD (Renewed)

3.8 (12 reviews)

Reliable Storage for Demanding Workloads The Western Digital 12TB Ultrastar DC HC520 is a renewed enterprise-class hard drive designed for demanding workloads. With a high workload rating, HelioSeal technology, and rotational vibration safeguard, this drive offers reliable performance for data ce...

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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

Reliable Storage for Demanding Workloads

The Western Digital 12TB Ultrastar DC HC520 is a renewed enterprise-class hard drive designed for demanding workloads. With a high workload rating, HelioSeal technology, and rotational vibration safeguard, this drive offers reliable performance for data centers and enterprise environments.

Specifications:

  • Capacity: 12TB
  • Interface: SATA 6 Gb/s
  • RPM Class: 7200 RPM
  • Cache: 256MB
  • Form Factor: 3.5"
  • Workload Rating: Up to 550TB per year
  • Technology: HelioSeal
  • Vibration Protection: Rotational Vibration Safeguard (RVS)

Key Features

Designed with a workload rating up to 550TB per year, 10X desktop rating (Workload rate is defined as the amount of data transferred to or from the hard drive; Workload Rate is annualized (TB transferred X (8760/ recorded power on hours); Workload Rate will vary depending on your hardware and software components and configurations

Power Disable Feature, adapter cable included for compatibility with any SATA system

Five generations of HelioSeal technology (10TB and above)

Rotational Vibration Safeguard (RVS) technology for vibration protection

Zero Power On Hours

Specifications

Capacity
12TB
Interface
SATA
Workload Rating
Up to 550TB per year
Technology (10TB+)
Five generations of HelioSeal
Vibration Protection
Rotational Vibration Safeguard (RVS)
Condition
Renewed
Power On Hours
Zero
Included Accessory
Power Disable Feature adapter cable

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Pros & Cons

👍 Pros

  • Engineered for a high workload rating of up to 550TB per year, making it suitable for demanding enterprise environments.
  • Features a workload rating 10X higher than desktop drives, indicating superior durability for continuous operation.
  • Incorporates Rotational Vibration Safeguard (RVS) technology, providing enhanced protection against system vibrations.
  • Designed with five generations of HelioSeal technology for 10TB and above models, which contributes to efficiency and reliability.
  • Includes an adapter cable to ensure compatibility with any SATA system, increasing its versatility for various setups.

👎 Cons

  • The product is a renewed item, which might raise concerns for some users compared to a brand-new unit.
  • The workload rate will vary depending on hardware and software configurations, meaning actual performance may differ.
  • The "Zero Power On Hours" feature, while beneficial for renewed drives, implies previous ownership rather than being factory new.
  • Specific details on rotational speed (RPM) or cache size are not provided in the available features.
  • Its enterprise-grade design might mean it's overkill or less cost-effective for typical consumer or desktop use cases.

Frequently Asked Questions

This HDD is designed with a high workload rating of up to 550TB per year, making it suitable for demanding data center applications, which is 10X a desktop rating.
Yes, it includes a Power Disable Feature adapter cable to ensure compatibility with any SATA system.
HelioSeal technology is a design feature that uses helium to reduce drag and turbulence, improving power efficiency and reliability. This 12TB model benefits from five generations of HelioSeal technology.
This Western Digital Ultrastar DC HC520 12TB SATA HDD is a renewed product, tested and certified to work like new, with "Zero Power On Hours."
RVS technology provides enhanced protection against operational vibrations, which is crucial for maintaining consistent performance and reliability in multi-drive environments like servers.