Seagate IronWolf Pro 4TB 3.5" 7200RPM SATA III Internal NAS HDD

Overview

The Seagate ST4000NT001 is a 4TB internal hard drive designed for NAS systems that demand reliable, continuous operation. It fits into a 3.5-inch drive bay and connects via a SATA III interface, delivering data transfer speeds up to 250 MB/s. Running at 7200 rpm, this drive uses conventional magnetic recording to provide consistent performance, making it suitable for multi-bay, multi-user RAID environments where steady access and uptime are essential.

Built to handle heavy workloads with up to 550TB of data written annually and a mean time between failures of 2 million hours, it ensures durability and reliability. Seagate’s AgileArray technology enhances stability by balancing the drive on two planes and incorporating features like TLER and rotational vibration sensors, which help maintain performance and reduce errors in RAID setups. The 256MB cache further boosts responsiveness during intensive use.

This drive is a strong choice for small business servers, home office NAS units, or professional multi-user storage systems that require data to be accessible and secure around the clock. It also includes a 3-year Rescue Data Recovery Service and a 5-year limited warranty for added peace of mind.

Key features

• 4TB capacity with 7200 rpm conventional magnetic recording for steady and reliable storage
• SATA III 6 Gb/s interface combined with a 256MB cache to ensure smooth and efficient data flow
• Sustained transfer speeds up to 250 MB/s for handling large files and frequent access
• Designed to support heavy workloads up to 550TB per year, suitable for demanding NAS environments
• AgileArray technology balances the drive and includes TLER and rotational vibration sensors to optimize RAID performance and reduce errors
• 3-year Rescue Data Recovery Service included to help recover data in case of accidental loss
• Backed by a 5-year limited warranty, reflecting confidence in long-term reliability

Key specs

• Capacity: 4TB
• Form factor: 3.5-inch
• Interface: SATA III (6 Gb/s)
• Rotational speed: 7200 rpm
• Cache size: 256MB
• Sustained transfer rate: up to 250 MB/s
• Workload rate: up to 550TB per year
• Mean time between failures (MTBF): 2 million hours
• Recording technology: conventional magnetic recording

Connectivity and compatibility

This hard drive connects via a SATA III interface, which is widely supported by most NAS enclosures and desktop systems. Its 3.5-inch form factor fits standard drive bays, making installation straightforward in multi-bay NAS units or desktop storage arrays. The drive’s features are optimized for RAID configurations, ensuring compatibility with common NAS RAID levels and improving data integrity in multi-drive setups.

Performance and reliability

The combination of a 7200 rpm spindle speed and a large 256MB cache allows for responsive performance during heavy read/write operations. AgileArray technology enhances reliability by reducing vibration and managing error recovery, which is critical in RAID environments where multiple drives operate simultaneously. This drive is engineered to maintain consistent performance under continuous workloads, making it dependable for 24/7 operation.

Ideal uses and environments

This drive fits well in environments where data availability and durability are priorities, such as small business servers, home office NAS systems, and professional multi-user storage solutions. It is particularly suited for users who require a balance of high capacity, fast access speeds, and robust error management to support file sharing, backups, and media streaming across multiple users.