Seagate ST91000640NS SATA 1TB Hard Disk Drive
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Seagate ST91000640NS 1TB HDD SATA 6GBPS 7.2K RPM 64MB Buffer Refurbished

Availability: In Stock
Part Number#: ST91000640NS
List Price was: $581.82
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You Save: $389.82 (67% off)


Short Description:
ST91000640NS 1TB (Terabytes) Serial Advanced Technology Attachment (SATA) Gigabits Per Second (6GBPS) 7.2K Revolutions Per Minute (RPM) 64MB (Megabyte) Buffer 2.5Inches Internal Hard Disk Drive | Made by Seagate | Refurbished | Dell OEM
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days
Product overview for the Seagate ST91000640NS

In the world of digital storage, the Seagate ST91000640NS 1TB internal hard disk drive stands out as a reliable and high-performance option. Packed with features like a 7.2K RPM speed, SATA 6GBPS interface, 64MB buffer, and a compact 2.5-inch form factor, this hard disk drive (HDD) caters to various computing needs. In this comprehensive guide, we'll delve into the details of each specification, exploring how they contribute to the overall performance and functionality of the device.

Capacity: 1TB Storage Space

The Seagate ST91000640NS offers a substantial 1TB HDD of storage space, making it suitable for a wide range of applications. Whether you're a casual user with a growing collection of multimedia files or a professional requiring ample storage for work-related data, this HDD provides the capacity needed to accommodate diverse storage demands.

Speed: 7.2K RPM for Swift Data Access

One of the key performance metrics of any hard disk drive is its rotational speed, measured in revolutions per minute (RPM). The Seagate ST91000640NS boasts a 7.2K RPM, indicating that the disk platters spin at 7,200 revolutions per minute. This higher rotational speed contributes to faster data access times, making it ideal for tasks that require quick read and write operations, such as running applications and loading large files.

Interface: SATA 6GBPS for High-Speed Data Transfer

The SATA (Serial ATA) interface plays a crucial role in determining the data transfer speed between the hard disk drive and the rest of the computer system. The Seagate ST91000640NS features a SATA 6GBPS interface, providing a data transfer rate of 6 gigabits per second. This high-speed interface ensures efficient communication between the HDD and other components, facilitating smooth and responsive system performance.

Buffer Size: 64MB for Enhanced Data Handling

The presence of a buffer, also known as a cache, is essential for optimizing data transfer and improving overall HDD performance. The Seagate ST91000640NS is equipped with a generous 64MB buffer, which serves as a temporary storage area for frequently accessed data. This helps in reducing latency and enhancing the responsiveness of the drive, especially when dealing with repetitive tasks or large datasets.

Form Factor: Compact 2.5-Inch Design

The physical size of a hard disk drive is a critical consideration, especially in devices where space is limited. The Seagate ST91000640NS comes in a 2.5-inch form factor, making it a compact and space-efficient storage solution. This form factor is commonly found in laptops and other portable devices, allowing users to benefit from a high-capacity storage solution without compromising on space or portability.

Reliability and Durability

Seagate, as a renowned name in the storage industry, is known for producing reliable and durable hard disk drives. The ST91000640NS is no exception, featuring robust construction and advanced technologies that enhance its reliability. This reliability is crucial for safeguarding your data, ensuring that your files remain intact and accessible over the long term.

Applications and Use Cases

The Seagate ST91000640NS, with its combination of high capacity, speed, and reliability, is suitable for a variety of applications and use cases. Here are some scenarios where this internal hard disk drive excels:

Laptop Upgrades

The 2.5-inch form factor makes it an excellent choice for upgrading the storage capacity of laptops. Users can enjoy a significant boost in storage without compromising the portability of their devices.

Professional Workstations

For professionals working with large datasets, such as video editors, graphic designers, and 3D modelers, the 1TB capacity and high-speed performance make the ST91000640NS a valuable asset.

Data Centers and Servers

The reliability and durability of this Seagate HDD make it suitable for use in data centers and servers where constant uptime and data integrity are critical.

Gaming Consoles

Gamers seeking additional storage for their consoles can benefit from the ST91000640NS's high capacity and speed, ensuring faster load times for games and a seamless gaming experience.

General Information about the Seagate ST91000640NS
  • Manufacturer: Seagate
  • Model Number or SKU# ST91000640NS
  • Type: Hard Disk Drive (HDD)
  • Product Type: SATA 6GBPS
Performance for the 1TB SATA 6GBPS Hard Drive
  • Cache: 64 MB
  • Capacity: 1 TB (1000 GB)
  • Areal Density: 417 GB/in²
  • Spin Speed: 7200 RPM
  • Sustained Data Transfer Rate: 115 MB/s
  • Average Latency: 4.16 ms
  • Random Read Seek Time: 7.5 ms
  • Random Write Seek Time: 8.5 ms
  • I/O Data Transfer Rate: 600 MB/s
  • Unrecoverable Read Errors: 1 in 10^15
  • MTBF (Mean Time Between Failures): 1,400,000 hours
  • Annual Failure Rate: 0.62%


  • 12V Start Max Current: 0.85A
  • 5V Start Max Current: 0.51A
  • Average Idle Power: 2.95W
  • Average Operating Power: 5.43W

Outline, the Seagate ST91000640NS 1TB 7.2K RPM SATA 6GBPS 64MB Buffer 2.5-Inch Internal Hard Disk Drive stands out as a versatile and high-performance storage solution. Whether you're upgrading your laptop, enhancing the storage capacity of your workstation, or ensuring the reliability of your server, this Seagate HDD offers a compelling combination of capacity, speed, and durability. With its 1TB storage space, 7.2K RPM speed, SATA 6GBPS interface, 64MB buffer, and compact 2.5-inch form factor, it caters to the diverse needs of users across various applications. Consider the Seagate ST91000640NS for a reliable and efficient storage solution that delivers both performance and durability.

Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

About Refurbished Products

Refurbished products are typically refurbished by an Original Manufacturer or an affiliate of the manufacturer or 3rd party facility. This product may have minor blemishes due to normal product usage and doesn't necessarily come with documentation and software unless indicated, but has been well tested and generally has never had any defects.


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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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FedEx Shipping Options:

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Worldwide Shipping Options:

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