This article covers Seagate IronWolf Pro 24TB NAS内蔵ハードドライブ 3.5インチ 7.200U.

Overview

The Seagate IronWolf Pro 24TB (model ST24000NTZ02) is a 3.5-inch internal hard disk drive purpose-built for multi-bay NAS and enterprise RAID storage solutions. It employs Conventional Magnetic Recording (CMR) technology, ensuring consistent performance and reliability even under heavy workloads. With a spindle speed of 7,200 RPM and a 256MB cache, it delivers sequential transfer rates of up to 285 MB/s. What sets this drive apart is its massive 24TB capacity combined with Seagate's AgileArray technology, which includes rotational vibration (RV) sensors and time-limited error recovery (TLER) for stable RAID operation in multi-drive environments. The drive also comes with a complimentary 3-year Rescue Data Recovery Service, providing peace of mind against accidental data loss. Positioned at the top of the high-end NAS HDD market, the IronWolf Pro 24TB is ideal for users who need to archive vast amounts of data—such as 4K/8K video footage, extensive photo libraries, or surveillance recordings. With a 5-year limited warranty and a Mean Time Between Failures (MTBF) of 2.5 million hours, it is built for 24/7 operation in demanding environments.

Compatibility Guide

Interface: SATA 6Gbps, compatible with any standard SATA port on motherboards and NAS enclosures. Form factor: 3.5-inch. Ensure your case or NAS has a 3.5-inch drive bay; it will not fit in 2.5-inch bays. Supported devices: Desktop PCs and NAS systems. Optimized for hot-swappable NAS bays. RAID support: Designed for RAID 0/1/5/6/10 configurations. TLER prevents drive dropouts from RAID arrays. Workload rate: 550 TB/year, suitable for 24/7 operation. Power consumption: Approximately 5.0W idle, 7.5W active (typical). Plan your PSU capacity accordingly for multi-drive setups.

Product Info

Release date: 2024 (model ST24000NTZ02) Price: Approximately ¥197,991 on (as of July 2026) Warranty: 5-year limited warranty (standard from Seagate) Sales channels: , Seagate official store, major PC parts retailers * Market position: High-end NAS HDD. The 24TB capacity is among the largest available for consumer NAS drives. The CMR recording technology gives it a clear advantage over SMR drives in write performance and reliability, making it a top choice for serious NAS users.

Best Use Cases

Home/Small Office NAS Users: Ideal for building large storage pools on multi-bay NAS units from Synology or QNAP. Four 24TB drives in RAID 5 yield approximately 72TB of usable space—perfect for backing up photos, videos, and documents. However, the high per-drive cost means this is best suited for users with a generous budget. Creative Professionals: Perfect for archiving 4K/8K video projects or massive RAW photo libraries. The 285 MB/s sequential read speed allows for reasonably fast file transfers. For active editing, pair this HDD with an NVMe SSD for your OS and applications. * Surveillance System Administrators: With 24TB of capacity, this drive can store weeks or months of high-resolution security camera footage. Its 24/7 rated design and high workload tolerance make it a reliable choice for continuous recording.

Things to Consider

High Cost: At roughly ¥198,000, this is a premium-priced drive. The cost per terabyte is around ¥8,250/TB, which is higher than many SMR-based alternatives. The premium is justified by CMR reliability and the included data recovery service, but budget-conscious users may find better value in smaller or SMR drives. Power and Heat: The 7,200 RPM motor draws about 5W at idle and more under load. In a multi-drive NAS (4+ drives), ensure adequate cooling and a power supply with sufficient headroom. Dense NAS enclosures may require additional fans. Not a Boot Drive: This HDD is strictly for data storage. For your operating system and applications, use a fast NVMe SSD. Booting from this HDD will result in noticeably slow performance. Competitors: Key alternatives include the Western Digital Red Pro 24TB (WD240KFGX) and Seagate's own Exos 24TB (ST24000NM002H). The IronWolf Pro differentiates itself with NAS-optimized firmware and the included Rescue Data Recovery Service. ## FAQ
Q: Can I use this HDD in a regular desktop PC? A: Yes, it connects via standard SATA 6Gbps and fits in a 3.5-inch drive bay. However, it is not recommended as a boot drive due to slower access times compared to SSDs. Use it for mass storage alongside an SSD. Q: Is it suitable for RAID configurations? A: Absolutely. The IronWolf Pro is engineered for RAID environments, featuring TLER to prevent drive dropouts. It works reliably with RAID 0, 1, 5, 6, and 10. Q: How much data can 24TB hold? A: Approximately 480 4K movies (50GB each), 480,000 high-resolution RAW photos (50MB each), or 2.4 million MP3 songs (10MB each). It is an excellent choice for large media libraries and backups.