Best SAS Internal Hard Drives of 2025

The MDD 10TB SAS Drive offers the largest storage capacity available in a 3.5-inch server-class hard drive, making it ideal for users who need ample space for data storage. With a 7200 RPM speed, this drive is built for continuous operation, ensuring reliability and performance for your critical tasks. It can store up to 10 petabytes in a single rack, which is perfect for large-scale data centers. Additionally, this drive is designed for use with RAID systems and NAS storage, allowing you to enhance your data security and access speed efficiently.

The Seagate Enterprise Capacity 6TB HDD is a high-performance internal hard drive designed for enterprise server and data center environments. With its SAS interface, this drive offers higher bandwidth and is not compatible with SATA backplanes. It features a 6TB storage capacity, 7200 RPM rotational speed, and 128MB cache, providing ample space for storing and accessing data quickly. The dual interface ports allow for flexible connectivity options. Additionally, the PowerChoice technology helps reduce power consumption, while the low halogen and super parity features ensure data integrity and protection. Please note that this hard drive is not suitable for personal computers but is ideal for servers and data centers requiring reliable and efficient storage solutions.

The Seagate 4TB Hard Drive is a Certified Refurbished product, ensuring it looks and functions like new. This means you can enjoy high performance without the cost of a brand-new unit. With a robust 7200 rpm spindle speed and a 6Gb/s SAS interface, it offers fast data transfer rates, making it ideal for demanding applications. The drive's generous 4TB capacity provides ample storage space for your important files. Plus, it comes with a minimum 90-day warranty, giving you peace of mind with your purchase.

The HGST 12TB HDD is designed specifically for server use, featuring a SAS interface that ensures high performance and compatibility with enterprise systems. With a massive 12TB storage capacity, it provides ample space for your data needs, making it ideal for cloud and hyperscale storage solutions. This hard drive is power-efficient, allowing you to save on energy costs while maintaining a high capacity. Additionally, it boasts a remarkable reliability rating, with an impressive 2.5 million hours mean-time-between-failure, ensuring your data remains safe and intact over time.

The MDD 8TB SAS Drive offers the highest storage capacity available in a 3.5-inch server class hard drive, perfect for users needing extensive data storage. With its reliable 7200 RPM speed, this drive is designed for continuous operation, ensuring your data is always accessible. You can efficiently store massive amounts of data, up to 10 PB in a single rack, making it ideal for data centers and NAS systems. Additionally, its advanced write caching technology enhances performance, giving you a significant boost in speed and efficiency when handling data-intensive tasks.

The Seagate Exos X20 is an impressive 20TB internal hard drive designed for enterprise use. With a remarkable mean time between failures of 2.5 million hours, you can rely on this drive for long-term storage without frequent replacements. It boasts a low annual failure rate of just 0.35%, ensuring that your data remains safe and accessible. Additionally, it minimizes the chance of read errors, with only one error expected for every 10 quadrillion bits read. This level of reliability is essential for businesses that require consistent performance and data integrity.

The Seagate Exos X10 is a robust 10TB internal hard drive designed for high-performance servers. With its SAS 12Gb/s interface, it ensures rapid data transfer speeds, making it ideal for demanding applications. You can benefit from a maximum sustained transfer rate of 254MB/s, which means less waiting time while accessing large files. Additionally, the average latency of 4.16 ms allows for quick response times, enhancing your overall system efficiency. This drive requires a power supply of +12V and +5V, ensuring compatibility with capable disk controllers in your server setup.

The MDD 4TB SAS Drive offers exceptional storage capacity, making it ideal for server-class applications. With its 7200 RPM speed, this hard drive is engineered for high reliability, ensuring continuous operation 24/7. It features advanced write caching technology, which boosts performance by 20%, enhancing your data processing efficiency. Additionally, its compatibility with RAID systems and NAS ensures that you can integrate it into various storage solutions seamlessly, giving you flexibility in your setup.

The MDD 6TB SAS Drive is a high-quality internal hard drive designed for enterprise use. With a 7200 RPM speed, it ensures reliable performance for 24/7 operations, making it ideal for demanding environments. Its impressive MTBF of 2.0 million hours means you can trust it for long-term use. This drive supports advanced write caching, which enhances performance by up to 20%, allowing for faster data processing. Additionally, it is compatible with RAID systems and NAS storage, providing flexibility for your data management needs. Just remember to format the drive for it to be recognized by your system.

The Seagate Enterprise Capacity 3.5 is a SAS enterprise hard drive that offers 8TB storage capacity, 7200 RPM speed, and 256MB cache. It is not compatible with SATA controllers and designed only for enterprise use. The hard drive comes factory sealed and packaged in a high-quality pressured rated box for secure delivery. Also, it comes with a 2-year warranty through the point of purchase.