Seagate ST20000NM003D 20TB Hard Disk Drive
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Seagate ST20000NM003D Hard Drive 20TB 7.2K RPM SAS-12GBPS New

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Part Number#: ST20000NM003D
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Short Description:
ST20000NM003D Hard Disk Drive Exos X20 20 Terabytes (TB) 7200 Revolutions Per Minute (RPM) Serial-Attached SCSI (SAS) 12 Gigabytes Per Second (GBPS) 256 Megabytes (MB) Buffer 512E 4kn Sed 3.5inch Enterprise | Made by Seagate | Brand New 5 Years Warranty
Brand Warranty:
5 Years from the Manufacturer
Product Condition:
New Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days
Product Overview of the Seagate ST20000NM003D Hard Disk Drive

In the dynamic landscape of data storage, the Seagate ST20000NM003D Hard Disk Drive (HDD) stands out as a robust solution, catering to the ever-growing demands of enterprises. Boasting an impressive 20 Terabytes (TB) of storage capacity, coupled with a swift 7200 Revolutions Per Minute (RPM), the Exos X20 series is designed to deliver exceptional performance in professional environments. This comprehensive composition delves into the intricate details of the Seagate ST20000NM003D, unraveling its features, specifications, and technological marvels that make it an ideal choice for enterprise-level storage needs.

Serial-Attached SCSI (SAS) 12 Gigabytes Per Second (GBPS)

The Seagate ST20000NM003D employs the Serial-Attached SCSI (SAS) interface, offering a data transfer rate of 12 Gigabytes Per Second (GBPS). This high-speed interface ensures efficient communication between the HDD and the system, optimizing data throughput. The SAS interface is renowned for its reliability and scalability, making it an ideal choice for enterprise environments where performance and stability are paramount.

Storage Capacity 20 Terabytes (TB)

The heart of the Seagate ST20000NM003D lies in its colossal storage capacity. With a whopping 20TB at your disposal, this HDD addresses the escalating data requirements of modern businesses. From large-scale databases to high-definition multimedia content, the Exos X20 ensures that you never run out of storage space, enabling seamless data management and accessibility.

Rotational Speed 7200 Revolutions Per Minute (RPM)

The Exos X20 is not only about massive storage; it is also about speed. Operating at 7200 RPM, this HDD ensures swift data access and transfer rates. The high rotational speed minimizes latency, making it suitable for applications that demand real-time data processing. Whether it's data analytics, video editing, or database management, the Exos X20's speed plays a pivotal role in enhancing overall system performance.

Cache Size 256 Megabytes (MB) Buffer

A significant contributor to the Exos X20's performance is its generous cache size. With a 256MB buffer, this HDD intelligently caches frequently accessed data, reducing read and write times. The large cache becomes particularly beneficial in scenarios where quick data retrieval is crucial, such as in applications involving virtualization, databases, and content streaming.

Disk Format 512E 4kn

The Seagate ST20000NM003D adopts the 512E 4kn disk format, a design choice that enhances compatibility and versatility. The 512E format ensures seamless integration with both legacy systems using 512-byte sectors and modern systems utilizing 4-kilobyte sectors. This adaptability makes the Exos X20 a versatile solution, accommodating a wide range of hardware configurations without compromising performance.

Sed Technology Data Security Beyond Ordinary

Security is a top priority in enterprise environments, and the Exos X20 incorporates Self-Encrypting Drive (SED) technology to address this concern. SED technology encrypts data at the drive level, providing a robust defense against unauthorized access. With hardware-based encryption, the Exos X20 ensures that sensitive data remains secure, making it an ideal choice for industries with stringent data protection regulations.

Form Factor 3.5inch Enterprise

The physical form factor of the Seagate ST20000NM003D is tailored for enterprise applications, adhering to the 3.5-inch standard. This form factor ensures compatibility with standard server and storage configurations, allowing for easy integration into existing setups. The 3.5-inch Enterprise design also contributes to the Exos X20's durability and reliability, making it a dependable solution for mission-critical operations.

Benchmarking the Exos X20

To gauge the real-world performance of the Seagate ST20000NM003D, let's delve into some benchmarking metrics. In a series of tests simulating data-intensive tasks, the Exos X20 consistently demonstrates its prowess.

Sequential Read and Write Speeds

One of the key indicators of an HDD's performance is its sequential read and write speeds. The Exos X20 excels in sequential data transfers, with read and write speeds that outperform many competitors in its class. This attribute makes it well-suited for applications requiring large file transfers, such as video editing and archival storage.

Data Centers and Enterprise Storage

The Seagate ST20000NM003D is tailor-made for data centers and enterprise storage environments. Its combination of high capacity, fast performance, and enterprise-grade features positions it as an ideal choice for organizations dealing with vast amounts of data. Whether used in standalone servers or integrated into storage arrays, the Exos X20 excels in managing and securing data in enterprise settings.


The Seagate ST20000NM003D is a high-performance hard drive designed for enterprise-level storage systems and servers. The drive has a large storage capacity of 20TB, which allows for storing large amounts of data. The drive also has a 7.2K RPM speed, which is considered to be high for a hard drive, meaning that it can quickly access and retrieve data from the disk.Additionally, the drive has a 12 Gbps data transfer rate, which is considered high and enables fast data transfer between the drive and the host system. The drive also comes with a large 256MB cache, which acts as a buffer between the drive and the host system, allowing for faster data access and retrieval. This is particularly useful for applications that require high IOPS (Input/Output Operations Per Second) such as video editing, data warehousing, and large-scale data backup.

General Information about this Seagate ST20000NM003D
  • Brand Name: Seagate
  • Model Number or SKU# ST20000NM003D
  • Product Type: 20TB-7.2K RPM
  • Product Name: Hard Disk Drive (HDD)
Technical Information of Seagate 20TB Hard Drive
  • Storage Capacity: 20TB
  • Enclosure: Internal
  • Interface: SAS-12GBPS
  • 512e Sector Size (bytes Per Sector): 512
  • 4kn Sector Size (bytes Per Sector): 4096
  • Drive Dimensions: 3.5 Inch
  • Mtbf: 2.5 Million Hours
Drive Performance of 7.2K RPM Hard Disk Drive
  • Interface Access Speed (GB/s): 12.0, 6.0, 3.0: Enjoy fast data transfer with interface access speeds of 12.0, 6.0, and 3.0 gigabits per second.
  • Sustained Data Transfer Rate Od (max): 285/272 MBPS: Experience efficient data transfer with a maximum sustained rate of 285 megabytes per second for OD (Outer Diameter) reads and 272 megabytes per second for writes.
  • Random Read/Write 4k QD16 Wcd (IOPS): 168/550: Achieve responsive performance with random read and write operations, measured at 168 and 550 IOPS (Input/Output Operations Per Second) respectively.
  • Average Latency: 4.16 ms: Benefit from low average latency of 4.16 milliseconds, ensuring quick access to your stored data.
  • Interface Ports: Dual: The hard drive is equipped with dual interface ports for enhanced connectivity.
  • Buffer: 256 MB: A substantial 256-megabyte buffer contributes to improved data handling and performance.
  • Rotational Speed: 7200 RPM: The hard drive operates at a fast rotational speed of 7200 revolutions per minute, optimizing overall performance.

In summary, the Seagate ST20000NM003D Hard Disk Drive Exos X20 emerges as a powerhouse in the realm of enterprise storage. With a colossal 20TB capacity, a swift 7200 RPM, and a suite of advanced features including SAS interface, large cache size, SED technology, and versatile disk format, the Exos X20 is a comprehensive solution for organizations with demanding data storage needs.Its performance benchmarks showcase its capabilities in handling sequential and random data access, ensuring efficiency across a spectrum of applications. From data centers and enterprise storage to video surveillance and cloud infrastructure, the Exos X20 proves its mettle in diverse scenarios, providing a reliable and high-performance storage solution.As businesses continue to grapple with escalating data volumes, the Seagate ST20000NM003D stands as a testament to the evolution of storage technology. It not only meets the current demands but also anticipates future needs with its scalability and adaptability. In a digital era where data is the lifeblood of enterprises, the Exos X20 stands tall as a reliable guardian of information, ready to serve the ever-expanding storage requirements of

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


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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).

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