Seagate ST4000NT001 IronWolf Pro 4TB NAS Internal HDD

The Seagate IronWolf Pro ST4000NT001 is a 4TB internal hard drive purpose-built for network-attached storage systems that demand 24/7 uptime and heavy workloads. Spinning at 7200RPM with a 256MB cache and SATA 6Gb/s interface, it delivers responsive throughput for simultaneous multi-user access, file serving, and RAID rebuilds. The drive uses CMR (Conventional Magnetic Recording) technology across its entire lineup, ensuring consistent write performance without the potential slowdowns associated with SMR drives during sustained or random write operations.

Seagate's AgileArray technology is at the core of the IronWolf Pro's NAS optimization. Dual-plane balancing reduces vibration-induced performance degradation, while built-in rotational vibration sensors actively compensate for the interference created by neighboring drives in multi-bay enclosures. Time-limited error recovery (TLER) prevents the drive from being dropped from a RAID array during extended error correction. Backed by a 550TB/year workload rating, 2.5 million hours MTBF, a 5-year limited warranty, and a complimentary 3-year Rescue Data Recovery plan, the IronWolf Pro delivers enterprise-class dependability and peace of mind for business and prosumer NAS deployments.