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

Overview

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.

Compatibility Guide

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.

Product Info

Release: Circa 2010 (long-running model) Price range: Approximately ¥2,000–¥3,000 (bulk, varies by seller) Warranty: Typically 2 years from Seagate (may vary for bulk units) Market position: Entry to mid-range. The 7200 RPM speed provides faster sequential transfers than 5400 RPM drives, but random access performance is far behind modern SSDs.

Best Use Cases

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.

Things to Consider

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. ## Alternatives
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)
  • Fulfilled by: Kahala Market(輸入品専門店)
  • ASIN: B00272NHOK
  • Note: This article covers a manufacturer-made product based on Amazon listing details.