This article covers ST31000528AS ハードディスク 3.5インチ 1TB Barracuda7200.12 バルク品 Seagate.

The Seagate Barracuda 7200.12 ST31000528AS is a 3.5-inch internal hard drive with a 1TB capacity and a 7200 RPM spindle speed.

It uses a SATA 3.0Gb/s interface and has been a popular choice for desktop storage upgrades and file servers for many years.

This bulk-packaged model offers a cost-effective way to add reliable storage without the premium of retail packaging. Despite its age, the drive delivers consistent sequential read/write performance of around 100-120 MB/s, making it suitable for storing large media files, backups, and less frequently accessed data.

It remains a viable option for budget-conscious builders and those maintaining older systems. Interface: Serial ATA 3.0Gb/s (SATA II) – backward compatible with SATA 6Gb/s ports.

Form factor: 3.5-inch – fits standard desktop drive bays.

Not compatible with 2.5-inch bays or laptops.

Power connector: Standard SATA 15-pin power connector. Capacity: 1TB – ideal as a secondary data drive alongside an SSD for the operating system.

Check the retailer's page for the latest price. The 7200 RPM speed provides faster sequential transfers than 5400 RPM drives, but random access performance is far behind modern SSDs.

Budget data storage: Ideal for storing large files like photos, videos, and backups at low cost. File server or NAS: The 7200 RPM speed handles multiple concurrent reads better than slower drives.

  • Legacy PC upgrade: Works directly with older SATA II motherboards, providing a cheap storage expansion for secondary data. The drive uses SATA 3.0Gb/s, so even when connected to a SATA 6Gb/s port, transfer speeds are capped at ~100-120 MB/s.

Modern SSDs are 5x faster or more. Bulk packaging means no accessories (cables, screws, manual) are included – you'll need to supply them separately.

Being over a decade old, there is inherent risk of age-related failure. Always maintain backups or use RAID for critical data.

A direct competitor is the Western Digital WD Blue 1TB (WD10EZEX), which supports SATA 6Gb/s and offers ~150 MB/s sequential reads. However, the ST31000528AS is often cheaper, making it the better choice for extreme budget builds.

A direct competitor in the same price and capacity tier is the Western Digital WD Blue 1TB (WD10EZEX). The WD10EZEX supports SATA 6Gb/s and offers higher sequential transfer speeds (~150 MB/s), but it typically costs a bit more.

The Seagate ST31000528AS, with its SATA 3Gb/s interface and lower price, is better suited for users who prioritize cost over peak transfer performance.

Product Disclosure (Amazon)

  • Manufacturer: シーゲイト(SEAGATE)
  • Seller: Kahala Market(輸入品専門店)
  • ASIN: B00272NHOK
  • Note: This article covers a manufacturer-made product based on Amazon listing details.