Western Digital WD4000F9YZ 7.2K RPM Hard Disk Drive
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Western Digital WD4000F9YZ 4TB 7.2K RPM HDD SATA 6GBPS New

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Part Number#: WD4000F9YZ
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Short Description:
WD4000F9YZ SE 4 Terabytes (TB) 7200 RPM Serial Advanced Technology Attachment (SATA) Gigabits Per Second (6GBPS) 64MB Buffer 3.5Inch Large Form Factor (LFF) Datacenter Capacity For Nas And Scale-Out Architectures Hard Disk Drive | Made by Western Digital | Brand New 3 Years Warranty
Western Digital
Brand Warranty:
3 Years Warranty
Product Condition:
New Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days

Product Overview of the Western Digital WD4000F9YZ HDD

In the dynamic world of data storage, the Western Digital WD4000F9YZ emerges as a notable contender, promising an impressive combination of high capacity, efficient speed, and reliable performance. This in-depth review aims to dissect the intricacies of the WD4000F9YZ 4TB HDD, exploring its key features, technical specifications, and practical applications. Whether you're a tech enthusiast or a professional seeking dependable storage, this review will provide a detailed understanding of what makes this Western Digital HDD stand out in the market.

Unveiling the WD4000F9YZ

The WD4000F9YZ is a product of Western Digital, a reputable name synonymous with cutting-edge storage solutions. As part of Western Digital's extensive lineup, this SATA 6GBPS HDD is specifically designed to cater to users with substantial storage needs. Let's delve into the core features that set the WD4000F9YZ apart in the competitive landscape.

Ample 4TB Storage Capacity

At the heart of the WD4000F9YZ lies a capacious 4 terabytes (TB) of storage space. This colossal capacity positions the HDD as an ideal solution for users dealing with vast amounts of data, ranging from personal use to professional applications requiring extensive storage.

High-Speed SATA 6Gbps Interface

The WD4000F9YZ is equipped with a SATA (Serial ATA) interface operating at a swift 6 gigabits per second (Gbps). This high-speed interface facilitates rapid data transfer between the HDD and the connected device, making it well-suited for tasks that involve large file transfers, such as video editing and data backup.

7.2K RPM Rotational Speed for Enhanced Performance

One of the standout features of the WD4000F9YZ is its rotational speed of 7,200 revolutions per minute (RPM). This speed significantly contributes to the HDD's overall performance by ensuring quick data access and minimizing latency. Applications requiring rapid and efficient data retrieval can benefit from this enhanced rotational speed.

Practical Applications

Media Storage for Professionals

The WD4000F9YZ caters to the needs of media professionals dealing with resource-intensive files, such as high-definition videos and graphics. With its expansive 4TB capacity, this HDD provides ample space for storing extensive media libraries, ensuring quick access during demanding editing processes.

Network-Attached Storage (NAS) Integration

For users implementing a Network-Attached Storage (NAS) setup, the WD4000F9YZ offers a balanced solution. Its SATA interface facilitates seamless integration into NAS systems, providing centralized and efficient storage for home or office networks. This versatility makes it an appealing choice for those seeking reliable network storage solutions.

Efficient Data Backup and Archiving

The robust features of the WD4000F9YZ make it well-suited for data backup and archiving purposes. With its substantial 4TB capacity and 7.2K RPM speed, users can create comprehensive backups of critical data, ensuring that the backup process is both swift and efficient.

Reliability and Durability

Western Digital Quality Assurance

As a product of Western Digital, the WD4000F9YZ benefits from the company's commitment to quality assurance. Western Digital is renowned for producing reliable storage solutions, and the WD4000F9YZ is no exception. Rigorous testing processes ensure durability and longevity, making it a trustworthy option for various applications.

Advanced Error Handling Mechanisms

To further enhance its reliability, the WD4000F9YZ incorporates advanced error-handling mechanisms. These mechanisms reduce the risk of data loss due to potential errors during operation, adding an extra layer of data protection. This feature is particularly valuable for users engaged in mission-critical applications where data integrity is paramount.

More Information

The Western Digital WD4000F9YZ is a 3.5-inch hard disk with a capacity of 4TB and a spindle speed of 7200 RPM. It has a 64MB buffer and uses a SATA interface with a data transfer rate of up to 6 Gbps. It is suitable for use as additional storage or for replacing a faulty hard drive in a desktop computer.

It is important to check the motherboard's documentation to ensure compatibility with this hard drive and to follow proper installation procedures. It is also worth noting that the hard drive has a power consumption of 8.5 watts when active and 5.8 watts when idle, so it is important to ensure that the computer's power supply unit has enough wattage to support the hard drive.


The reliability of a hard drive can depend on several factors, including the manufacturer, the model, and the specific unit. In general, hard drives from reputable manufacturers tend to be more reliable than those from lesser-known brands.

It is difficult to make a general statement about the reliability of the Western Digital WD4000F9YZ hard drive, as the reliability of a hard drive can vary from unit to unit. However, Western Digital is a well-known and reputable manufacturer of hard drives, and their products generally have a good reputation for reliability.

That being said, no hard drive is completely immune to failures, and it is always a good idea to have a backup of important data to prevent data loss in case of a hard drive failure. Regularly backing up your data and monitoring the health of your hard drive can help to minimize the risk of data loss due to hard drive failures.

General Information about this Western Digital WD4000F9YZ

  • Manufacturer: Western Digital
  • Model Number or SKU# WD4000F9YZ
  • Product Type: Hard Disk Drive
  • Interface: SATA 6GBPS

Technical Information for 4TB Hard Disk Drive

  • Storage Capacity: 4 TB
  • Enclosure: Internal
  • Drive Dimensions: 3.5 Inch
  • User Sectors Per Drive: 7,814,037,168
  • MTBF (Mean Time Between Failures): 800,000 Hours
  • Interface: SATA-6Gbps
  • Native Command Queuing: Yes
  • RoHS Compliant: Yes

Performance of SATA 6GBPS HDD

  • Data Transfer Rate (Maximum): 6 Gbps
  • Data Transfer Rate (Sustained): 171 Mbps
  • Buffer: 64 MB
  • Rotational Speed: 7200 RPM

In general, the Western Digital WD4000F9YZ 4TB 7.2K RPM HDD with SATA 6Gbps connectivity presents itself as a versatile and powerful storage solution. Its combination of ample storage capacity, high-speed data transfer, and robust reliability makes it a compelling choice for a wide range of users. Whether you're a media professional in need of expansive storage for large files or an individual seeking a reliable backup solution, the WD4000F9YZ fits the bill.

Backed by Western Digital's commitment to quality and advanced error-handling mechanisms, this HDD stands as a testament to the company's dedication to delivering dependable storage solutions. The user-friendly installation process and compatibility with standard SATA interfaces further enhance its appeal, making it accessible to users with varying levels of technical expertise.

In the competitive landscape of data storage, the Western Digital WD4000F9YZ asserts itself as a noteworthy contender, offering a harmonious blend of capacity, speed, and reliability. Whether deployed in professional settings or integrated into personal computing setups, this HDD represents a reliable storage companion capable of meeting the evolving needs of users in the digital age.

Western Digital
Brand Warranty:
3 Years Warranty
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.

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(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).

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