Seagate ST20000NM000D 20TB Hard Drive
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Seagate ST20000NM000D 20TB Hard Drive 7.2K RPM Exos X20 New

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Part Number#: ST20000NM000D
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Short Description:
ST20000NM000D Exos X20 20 Terabytes (TB) 7200 Revolutions Per Minute (RPM) Serial Advanced Technology Attachment (SATA) 6 Gigabytes per Second(GBPS) 256 Megabyte (MB) Hard Disk Drive | Made by Seagate | Brand New 3 Years Warranty
Brand Warranty:
3 Years from the Manufacturer
Product Condition:
New Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days

Product Introduction of the Seagate ST20000NM000D

In the world of data storage, Seagate stands as a reliable and innovative brand, consistently delivering cutting-edge solutions to meet the demands of modern computing. The Seagate ST20000NM000D, part of the Exos X20 series, is a 20TB SATA hard disk drive that boasts impressive features. In this detailed guide, we'll explore the key aspects of the Seagate ST20000NM000D, from its colossal storage capacity to its robust 7200 RPM speed and advanced SATA interface.

Technical Specifications

Storage Capacity: 20 Terabytes (TB)

The Seagate ST20000NM000D boasts a colossal storage capacity of 20TB, making it an ideal choice for applications requiring vast amounts of data storage. Whether you're dealing with massive datasets, high-resolution media, or extensive databases, this HDD has you covered.

Rotational Speed: 7200 Revolutions Per Minute (RPM)

The rotational speed of a hard disk drive is a critical factor influencing its performance. The Seagate ST20000NM000D operates at an impressive 7200 RPM, indicating the number of revolutions the drive's platters make per minute. This high speed contributes to faster data access and transfer rates, making it suitable for demanding computing tasks.


The Seagate ST20000NM000D utilizes the Serial Advanced Technology Attachment (SATA) interface, a widely adopted and versatile connection standard in the world of storage. With a blazing-fast data transfer rate of 6GBPS, this HDD ensures quick and efficient communication with the host system, enhancing overall performance.

Storage Buffer: 256 Megabytes (MB)

The inclusion of a 256MB storage buffer in the Seagate ST20000NM000D enhances its ability to handle data efficiently. This buffer acts as a temporary storage space for frequently accessed data, reducing latency and improving overall read and write speeds.

Exploring the Features

Built for Performance: 7200 RPM

The Seagate ST20000NM000D's 7200 RPM rotational speed is a key feature that enhances its performance. This speed ensures that data can be accessed and transferred rapidly, making it suitable for applications where responsiveness is crucial, such as data-intensive computing tasks.

SATA Interface: High-Speed Data Transfer

The SATA interface is a standout feature of the Seagate ST20000NM000D, providing a seamless and high-speed connection to the host system. With a data transfer rate of 6GBPS, this interface optimizes the flow of data between the HDD and the computer, delivering a smooth and efficient user experience.

Massive Storage Capacity: 20TB

The Seagate ST20000NM000D's 20TB storage capacity is a game-changer for users with significant data storage needs. From large-scale data centers to creative professionals working with massive media files, this HDD offers a capacious solution to accommodate extensive datasets without compromising performance.

Use Cases

Data Centers and Cloud Storage

The Seagate ST20000NM000D is well-suited for deployment in data centers and cloud storage environments where the demand for storage capacity is exceptionally high. Its 20TB capacity and robust performance make it a reliable choice for handling vast amounts of data in these scalable and dynamic settings.

Creative Professionals and Media Storage

For creative professionals working with high-resolution videos, images, and multimedia projects, the Seagate ST20000NM000D provides the expansive storage needed. Its quick access speeds and massive capacity make it an ideal solution for storing and managing large media files efficiently.


In enterprise settings, where reliability and performance are paramount, the Seagate ST20000NM000D finds its place in applications such as database management, virtualization, and other business-critical operations. Its combination of high storage capacity and rapid data access contributes to a seamless workflow in these environments.

Advantages and Innovations

Enhanced Data Transfer with SATA

The SATA interface in the Seagate ST20000NM000D ensures a swift and reliable data transfer experience. With a 6GBPS transfer rate, users can enjoy efficient data access and quick file transfers, improving overall system responsiveness.

Efficient Data Handling with 256MB Buffer

The inclusion of a 256MB storage buffer enhances the Seagate ST20000NM000D's ability to handle data efficiently. This buffer acts as a temporary cache, optimizing the flow of data between the HDD and the computer, resulting in improved performance and reduced latency.

Compatibility with Operating Systems

The Seagate ST20000NM000D is designed to be compatible with various operating systems, including Windows, macOS, and Linux. This ensures that users can leverage its high storage capacity and performance across different platforms, making it a versatile solution for diverse computing environments.

MTBF: 2.5 Million Hours

The Mean Time Between Failures (MTBF) of the Seagate ST20000NM000D is an impressive 2.5 million hours. This metric reflects the drive's reliability, indicating the average time it is expected to operate before encountering a failure. With a high MTBF, users can trust in the long-term durability and stability of this HDD.

Helium Sealed-Drive Design

The helium-sealed-drive design of the Seagate ST20000NM000D contributes to its longevity and reliability. By reducing air resistance and turbulence, the helium-sealed environment inside the drive promotes a stable operation, minimizing wear and tear on internal components.

General Information about this Seagate ST20000NM000D

  • Manufacturer: Seagate
  • Part Number or SKU# ST20000NM000D
  • Product Type: Hard Disk Drive
  • Interface: SATA-6GBPS

Technical Information for SATA-6GBPS HDD

  • Storage Capacity: 20TB
  • Enclosure: Internal
  • 512e Sector Size (Bytes per Sector): 512
  • 4kn Sector Size (Bytes per Sector): 4096
  • Helium Sealed-Drive Design: Yes
  • Low Halogen: Yes
  • PowerChoice™ Idle Power Technology: Yes
  • PowerChoice™ Power/Performance Technology: Yes
  • Low Halogen/Hot-Plug Support: Yes
  • Organic Solderability Preservative: Yes
  • RSA 2048 Firmware Verification (SD&D): Yes

Drive Performance

  • Interface Access Speed (GB/s): 6.0, 3.0
  • Sustained Data Transfer Rate OD (Max): 285/272 Mb/s
  • Random Read/Write 4K QD16 WCD (IOPS): 168/550
  • Average Latency: 4.16 ms
  • Interface Ports: Single
  • Buffer: 256 MB
  • Rotational Speed: 7200 RPM


The Seagate ST20000NM000D is ideal for a variety of applications, making it a versatile choice for different scenarios:

  • Scalable Hyperscale Applications/Cloud Data Centers
  • Massive Scale-Out Data Centers
  • Big Data Applications
  • High-Capacity Density RAID Storage
  • Mainstream Enterprise External Storage Arrays
  • Distributed File Systems, Including Hadoop and Ceph
  • Enterprise Backup and Restore—D2D, Virtual Tape
  • Centralized Surveillance

In summary, the Seagate ST20000NM000D Exos X20 20TB SATA HDD emerges as a versatile and powerful storage solution, catering to the diverse needs of modern computing environments. With its colossal storage capacity, rapid rotational speed, SATA interface, and a host of features designed for optimal performance, this HDD is well-positioned to address the demands of data-intensive applications, cloud data centers, and distributed storage environments. Whether you're navigating the realms of big data analytics, operating massive-scale data centers, or implementing reliable backup solutions, the Seagate ST20000NM000D stands out as a reliable and high-performance storage solution. Explore the possibilities with the Exos X20 series and elevate your storage capabilities to new heights with Seagate's innovative technology.

Brand Warranty:
3 Years from the Manufacturer
Product Condition:
New Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days


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What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

What is not covered by our warranty?

The reason why our warranty does not cover any problem caused by the following conditions:

(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;

(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

What is the Manufacturer/Brand Warranty?

In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
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Important notes:

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