Western Digital WUH721816AL5205 16TB Hard Drive
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Western Digital WUH721816AL5205 16TB SAS-12GBPS Hard Drive Refurbished

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WUH721816AL5205 Ultrastar Dc Hc550 16 Terabytes (TB) 7200 Revolutions per minute (RPM) Serial-Attached SCSI (SAS)-12 Gigabytes Per Second (GBPS) 512mb Buffer 512e Sed-fips 3.5-inch Helium Platform Enterprise Hard Disk Drive | Made by Western Digital | Refurbished | Dell OEM
Western Digital
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days
Overview of the Western Digital 16TB SAS-12GBPS Hard Drive

In the world of data storage, hard disk drives (HDDs) play a crucial role in preserving and managing vast amounts of information. Western Digital, a well-known name in the data storage industry, has consistently delivered reliable and high-performance storage solutions for both personal and enterprise needs. One of their standout offerings is the Western Digital WUH721816AL5205 Ultrastar Dc Hc550, a 16 Terabyte (TB) enterprise-grade hard disk drive. In this detailed review, we will explore the key features, specifications, and benefits of the WUH721816AL5205 Ultrastar Dc Hc550, shedding light on why it's a suitable choice for enterprise-level storage needs.

The Western Digital WUH721816AL5205 Ultrastar Dc Hc550 is a heavyweight in the world of enterprise HDDs. It boasts a capacious storage capacity of 16TB, making it a suitable choice for organizations and professionals who require vast amounts of storage space for their critical data. Let's delve deeper into the various components and features that make this HDD a formidable contender in the storage market.

Understanding the WUH721816AL5205 Ultrastar Dc Hc550 HDD

7200 RPM - Power and Performance

One of the standout features of this enterprise HDD is its 7200 revolutions per minute (RPM) rotational speed. RPM is a critical parameter that determines how quickly the disk can access and transfer data. Higher RPM drives generally provide faster performance, making them ideal for data-intensive applications. The 7200 RPM of the WUH721816AL5205 ensures quick data retrieval and fast file transfers, reducing latency and improving overall system performance.

SAS-12 Gbps Interface

The WUH721816AL5205 Ultrastar Dc Hc550 features a Serial-Attached SCSI (SAS) interface with a data transfer rate of 12 Gigabytes Per Second (Gbps). The SAS interface is commonly found in enterprise-class storage solutions due to its robustness and high-speed data transfer capabilities. With 12 Gbps, this HDD can handle large data transfers with ease, making it a reliable choice for mission-critical applications where data throughput is paramount.

512MB Buffer - Data Caching

To further enhance its performance, the WUH721816AL5205 incorporates a 512MB buffer. The buffer acts as a temporary storage area where frequently accessed data can be stored for quick retrieval. This intelligent data caching mechanism helps reduce latency and enhances the overall performance of the HDD. It's especially useful when dealing with large datasets or running multiple applications simultaneously.

512e Technology - Data Storage Efficiency

The WUH721816AL5205 Ultrastar Dc Hc550 employs 512e technology, which stands for 512 bytes per sector, emulating the standard 512-byte sector size while actually using 4K (4096 bytes) physical sectors. This technology is essential for ensuring compatibility with older systems that expect 512-byte sectors. By using 512e technology, Western Digital ensures that the drive can seamlessly integrate into a wide range of systems and applications, preserving compatibility and ease of use.

Self-Encrypting Drive (SED) with FIPS Compliance

Data security is a paramount concern for enterprises. The WUH721816AL5205 addresses this concern by offering Self-Encrypting Drive (SED) technology. This feature allows the drive to automatically encrypt all data stored on it, safeguarding sensitive information from unauthorized access. Additionally, the drive is FIPS (Federal Information Processing Standards) compliant, meeting stringent security requirements set by the U.S. government. This makes it a trusted choice for organizations that deal with confidential and classified data.

3.5-Inch Helium Platform

The WUH721816AL5205 Ultrastar Dc Hc550 is designed on a 3.5-inch helium platform. Helium-filled drives are gaining popularity in the enterprise storage sector due to their unique advantages. The helium filling reduces air turbulence within the drive, resulting in lower power consumption and heat production. This not only enhances the drive's reliability but also extends its lifespan. Helium-filled drives are also more environmentally friendly as they require less power to operate.

The Benefits of Ultrastar Dc Helium Platform Enterprise Hard Disk Drive

High Capacity Storage

The most striking benefit of the Western Digital WUH721816AL5205 is its enormous storage capacity of 16TB. This makes it an ideal choice for organizations and professionals dealing with large datasets, high-resolution media files, or long-term data retention. From video production houses to data centers, this HDD offers a cost-effective solution for managing vast amounts of critical information.

Exceptional Performance

The 7200 RPM rotational speed and the 12 Gbps SAS interface of the WUH721816AL5205 contribute to its exceptional performance. Whether you are running intensive database applications, video editing software, or virtualization environments, this HDD can handle data access and transfers swiftly, reducing wait times and improving workflow efficiency.

Data Caching for Faster Access

The inclusion of a 512MB buffer in this HDD enhances its data caching capabilities. Frequently accessed data is temporarily stored in the buffer, reducing the need to access the physical disk for every data request. This results in faster access times, which can significantly improve the performance of read-heavy and data-intensive applications.

Versatile Compatibility

The 512e technology employed by the WUH721816AL5205 ensures compatibility with a wide range of systems and applications. It can seamlessly integrate into both older systems that use 512-byte sectors and modern systems that utilize 4K sectors. This versatility is valuable for organizations that need to upgrade their storage infrastructure without worrying about compatibility issues.

Enhanced Data Security

Data security is a top priority in today's digital landscape. The Self-Encrypting Drive (SED) technology in the WUH721816AL5205 ensures that all data stored on the drive is automatically encrypted, protecting it from unauthorized access. Moreover, its compliance with FIPS standards guarantees that the drive meets strict security requirements, making it suitable for government agencies, healthcare institutions, and financial organizations.

Eco-Friendly and Efficient

The 3.5-inch helium platform of the WUH721816AL5205 not only contributes to its performance but also makes it an eco-friendly choice. The helium filling reduces power consumption and heat generation, resulting in a more efficient and reliable drive. Lower power consumption translates to reduced energy costs and a smaller carbon footprint, making it a sustainable option for data centers and enterprises committed to environmental responsibility.

Use Cases and Applications
  • Data Centers: Data centers are the backbone of the digital age, serving as hubs for storing and managing vast amounts of data. The Western Digital WUH721816AL5205 is a perfect fit for data centers, where it can accommodate the constant influx of data generated by cloud services, websites, and various online platforms. Its high capacity and performance capabilities make it an ideal choice for server deployments and data archiving.
  • Media and Entertainment: The media and entertainment industry, including video production houses, rely heavily on storage solutions that can handle high-definition video files, audio recordings, and graphic assets. The 16TB capacity of the WUH721816AL5205 ensures that media professionals have ample space to store and edit their content. Its fast data transfer rate and 7200 RPM speed make it a valuable asset for video editing workstations, ensuring smooth playback and rendering of high-resolution videos.
  • Healthcare: The healthcare sector generates a significant volume of data through patient records, medical imaging, and research. Security and compliance are of utmost importance in this industry. The WUH721816AL5205, with its Self-Encrypting Drive (SED) and FIPS compliance, is well-suited for storing and securing sensitive healthcare data. Its high capacity can easily accommodate the growing data needs of healthcare institutions.
  • Financial Services: Financial organizations handle an enormous amount of financial data, from customer transactions to historical records. The security and integrity of this data are non-negotiable. The WUH721816AL5205 provides the necessary security features to ensure the confidentiality of financial data. Its robust performance ensures that financial applications run smoothly, enabling efficient transaction processing.
  • Virtualization: Virtualization environments require storage solutions that can handle the demands of multiple virtual machines (VMs) running simultaneously. The WUH721816AL5205's high capacity and 7200 RPM speed make it a suitable choice for hosting VMs and their associated data. Its fast data transfer rate ensures that VMs load quickly and operate efficiently.
Error Correction and Prevention

Data integrity is crucial in enterprise settings. The drive incorporates error correction and prevention mechanisms to ensure that data is stored and retrieved accurately. These mechanisms identify and rectify errors in real-time, reducing the risk of data corruption and ensuring the reliability of stored information.

Advanced Cooling

The helium-filled design not only reduces power consumption but also contributes to better cooling. Lower heat generation means that the drive can operate at optimal temperatures for longer periods. Advanced cooling mechanisms further enhance the drive's reliability, making it a dependable choice for 24/7 operation in data center environments.

Data Recovery and Backup

Despite the drive's reliability, data loss can still occur due to various reasons, including accidental deletions or hardware failures. It's essential to implement data recovery and backup solutions to protect valuable data. Regular backups to secondary storage or cloud-based services are advisable to ensure data can be recovered in the event of an unexpected failure.

Firmware Updates

Firmware updates provided by the manufacturer should be applied periodically to enhance drive performance, compatibility, and security. These updates may address potential vulnerabilities or improve the drive's functionality. It's crucial to stay informed about firmware updates and ensure they are applied as recommended.


Ensure that the HDD is compatible with your existing hardware and software infrastructure. Verify that your server or storage enclosure supports SAS drives, and that the operating system recognizes the drive's specifications. Compatibility issues can lead to operational disruptions and additional costs.

General Information for Enterprise Hard Drive
  • Brand: Western Digital
  • Model: WUH721816AL5205
  • Product Line: Ultrastar
  • Product Series: Ultrastar Dc Hc550
  • Product Name: Ultrastar Dc Hc550 16TB Enterprise Hard Drive
  • Product Type: Hard Disk Drive
Applications/Environments of 16TB SAS HDD
  • Cloud & Hyperscale Storage
  • Massive Scale-out (MSO) and High-density Data Centers
  • Distributed File Systems
  • Bulk Storage using Object Storage Solutions like Ceph and OpenStack Swift
  • Primary and Secondary Storage for Apache Hadoop for Big Data Analytics
Key Features
  • Storage Capacity: 16TB
  • Enclosure: Internal
  • Interface: SAS 12Gbps
  • Drive Dimensions: 3.5 Inch
  • MTBF (Mean Time Between Failures): 2.5 Million Hours

Drive Performance

  • Interface Transfer Rate: 1200 Mbps
  • Sustained Transfer Rate: 250 Mbps
  • Average Latency: 4.16 ms
  • Buffer: 512 MB
  • Rotational Speed: 7200 RPM
Western Digital
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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ALLHDD guarantees that the products will not have defects in material that will affect the product's functionality during the Standard Warranty Period. The warranty period starts when the merchandise/items from our warehouse.

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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Important notes:

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