This article covers (IronWolf Pro.

Overview

The Seagate IronWolf Pro ST4000NE0025 is a 4TB 3.5-inch internal hard drive designed specifically for NAS environments. With a 7200 RPM spindle speed and 128MB cache, it delivers sequential transfer rates up to 214 MB/s. Rated for a 300 TB/year workload, it supports systems with 1 to 16 drive bays, making it a reliable choice for both home and small business NAS setups. This drive sits in the mid-to-high tier of Seagate's NAS lineup, offering CMR (Conventional Magnetic Recording) technology for consistent random write performance—unlike SMR drives that can slow down under sustained writes. The IronWolf Pro series includes AgileArray technology for RAID optimization and enhanced error recovery, ensuring stable operation in multi-drive arrays. Backed by a 3-year warranty and a 2-year Rescue Data Recovery service plan, the ST4000NE0025 provides peace of mind for users who prioritize data integrity. It's a solid balance of capacity, speed, and reliability for NAS-centric workloads.

Compatibility Guide

Form factor: 3.5-inch, fits standard desktop drive bays and most NAS enclosures. Interface: SATA 6Gb/s (backward compatible with SATA 3Gb/s). Power: Uses a standard SATA 15-pin power connector. Power draw is low—idle around 3.5W, active seek around 6.5W—so it places minimal load on the PSU. Designed for RAID environments with Time-Limited Error Recovery (TLER) to prevent drive dropouts. Works best in NAS units from Synology, QNAP, ASUSTOR, and others. Supports up to 16-bay NAS systems. Not recommended for use in external USB enclosures unless the enclosure supports 3.5-inch drives and adequate cooling.

Product Info

Released around 2016, the ST4000NE0025 remains a current model in Seagate's IronWolf Pro series. It's positioned as a mid-to-high-end NAS HDD, priced competitively in the 4TB segment (typically ¥8,000–¥10,000 in Japan). The 3-year warranty includes 2 years of Rescue Data Recovery service. Key specs: 4TB capacity, 7200 RPM, 128MB cache, SATA 6Gb/s interface, 300 TB/year workload rate, 1 million hours MTBF, CMR recording. The drive is optimized for 24/7 operation in multi-drive arrays.

Best Use Cases

Home NAS users: Ideal for storing photos, videos, and documents on a 2-bay or larger NAS. The CMR technology ensures consistent write speeds during backups and file transfers. Small office file server: Handles concurrent access from 5–10 users with ease. The 300 TB/year workload rating provides headroom for daily file sharing and automated backups. Creative professional backup drive: Suitable for periodic backups of large project files. The drive's reliability and error recovery features reduce the risk of data loss during critical backup windows. Who should NOT buy: Gamers needing fast game load times should stick with SSDs. Users who prioritize near-silent operation may find the 7200 RPM noise noticeable; a 5400 RPM IronWolf (non-Pro) might be better.

Things to Consider

The 7200 RPM speed generates more noise and vibration than 5400 RPM drives. If your NAS is in a living area, consider vibration-dampening mounts or a quieter model. 4TB is now considered entry-level capacity. If you plan to store large media libraries or multiple backup sets, a 6TB or 8TB model may be more future-proof. CMR drives cost more per terabyte than SMR alternatives. For pure media storage with mostly sequential writes, a SMR-based IronWolf (non-Pro) could save money. When used in a desktop PC (not NAS), TLER may cause compatibility warnings on some motherboards. Check your motherboard's RAID controller support before purchasing. ## FAQ
Q: Can I use this HDD as a boot drive in a desktop PC? A: Technically yes, but it's not recommended. An SSD will provide much faster boot times and application loading. Use this HDD for bulk storage or backups instead. Q: Does it work in a RAID 0 configuration? A: Yes, it works in any RAID level. However, for performance-sensitive RAID 0 arrays, consider using drives from the same batch to minimize variance. The TLER feature helps maintain array stability. Q: What is the actual power consumption? A: Idle power is approximately 3.5W, and active seek power is around 6.5W. This is very low, so even a 10-drive array will draw less than 70W under load. No special PSU considerations are needed. Q: Is the Rescue Data Recovery service available worldwide? A: The service is included for 2 years but may have regional restrictions. You must register the drive on Seagate's website to activate the service. Check Seagate's support page for your country's eligibility.

Product Disclosure (Amazon)

  • Manufacturer: シーゲイト(SEAGATE)
  • Seller: Happy life Shop
  • Fulfilled by: Happy life Shop
  • ASIN: B01MTIZMXY
  • Note: This article covers a manufacturer-made product based on Amazon listing details.