Western Digital
Western Digital 0F22146 MegaScale DC 4TB SATA HDD
★★★★★
Cost-Effective and Reliable Storage for Scale-Out Data Centers The HGST MegaScale DC 4000.B is engineered for scale-out data centers, offering a balance of low-power consumption, high capacity, and cost-effectiveness. Designed for low-workload applications such as multi-drive replicated environme...
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.
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Overview
Cost-Effective and Reliable Storage for Scale-Out Data Centers
The HGST MegaScale DC 4000.B is engineered for scale-out data centers, offering a balance of low-power consumption, high capacity, and cost-effectiveness. Designed for low-workload applications such as multi-drive replicated environments and online archives, this drive delivers reliable performance and 24x7 accessibility.
Specifications:
- Capacity: 4000GB (4TB)
- Form Factor: 3.5-Inch
- Interface: SATA 6Gb/s
- Buffer: 64MB
- Sector Size: 512e
- MTBF: 800K Hours
Key Features
Dual-Stage Actuator (DSA) and Enhanced Rotational Vibration Safeguard (RVS) for robust performance in multi-drive environments
6Gb/s SATA interface
Advanced Format with 512-byte emulation (512e)
800K hours MTBF
24x7 accessibility for enterprise-class, capacity-optimized applications
Specifications
Capacity
4TB
Interface
6Gb/s SATA
Technology
Dual-Stage Actuator (DSA)
Safeguard
Enhanced Rotational Vibration Safeguard (RVS)
Format
Advanced Format with 512-byte emulation (512e)
MTBF
800K hours
Accessibility
24x7
Application
Enterprise-class, capacity-optimized
Pros & Cons
👍 Pros
- Features Dual-Stage Actuator (DSA) technology, which improves head positioning accuracy for reliable read/write operations.
- Includes Enhanced Rotational Vibration Safeguard (RVS), ensuring robust performance and stability in multi-drive server environments.
- Offers a substantial 4TB storage capacity, providing ample space for large datasets and enterprise-level applications.
- Equipped with a 6Gb/s SATA interface, allowing for fast data transfer rates within compatible systems.
- Designed for 24x7 accessibility, making it suitable for continuous operation in demanding, capacity-optimized enterprise applications.
👎 Cons
- As a Hard Disk Drive (HDD), its performance will be slower than Solid State Drives (SSDs) for tasks requiring very fast data access.
- The "512-byte emulation (512e)" Advanced Format may require specific driver or operating system support for optimal compatibility in some older systems.
- While designed for 24x7 accessibility, the mechanical nature of HDDs means they are inherently more prone to failure than SSDs over long periods of constant operation.
- The 800K hours MTBF is a statistical measure and does not guarantee individual unit lifespan, and real-world results can vary.
- This drive is optimized for enterprise-class, capacity-optimized applications, potentially meaning its acoustic or power consumption characteristics might not be ideal for noise-sensitive home users.
Frequently Asked Questions
What is the storage capacity of this Western Digital hard drive?
This Western Digital MegaScale DC HDD offers a substantial 4TB of storage, making it suitable for large data storage needs.
What interface does this hard drive use?
It features a 6Gb/s SATA interface, providing fast data transfer rates for compatible systems.
How does the Dual-Stage Actuator (DSA) benefit the drive?
The Dual-Stage Actuator (DSA) improves head positioning accuracy, contributing to robust and reliable read/write performance in the drive.
Is this hard drive suitable for continuous operation?
Yes, it is designed for 24x7 accessibility, making it ideal for enterprise-class, capacity-optimized applications that require continuous uptime.
What is the purpose of Enhanced Rotational Vibration Safeguard (RVS)?
Enhanced Rotational Vibration Safeguard (RVS) helps to maintain robust performance in multi-drive environments by mitigating the effects of system vibrations.
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