This article covers Seagate シーゲイト 内蔵ハードディスク Desktop HDD 500GB ( 3.5 インチ.

Overview

Seagate's Desktop HDD series, model ST500DM002, is a 3.5-inch internal hard drive designed for cost-conscious desktop users. It offers 500GB of storage capacity, spins at 7200RPM, and features a 16MB cache with a SATA 6Gb/s interface. Known for its reliability and low price, this drive has been a staple in many DIY PC builds and office machines for years. This drive is better suited for bulk data storage and backup than for use as a primary system drive. With Seagate's AcuTrac servo technology, it delivers stable read/write performance for everyday tasks. The 500GB capacity is sufficient for an operating system, essential applications, and a good amount of documents and media files. Positioned as an entry-level internal HDD, the ST500DM002 is ideal for budget-conscious users who need reliable storage without breaking the bank. However, it's important to note that its access speeds are significantly slower than modern SSDs, making it unsuitable as a boot drive in contemporary builds.

Compatibility Guide

The ST500DM002 uses a standard 3.5-inch form factor and a SATA 6Gb/s interface. It is compatible with any desktop motherboard that has a SATA port and any PC case that accommodates a 3.5-inch drive. Power is supplied through a standard SATA power connector. It is backward compatible with SATA 3Gb/s (SATA II) ports, but the transfer rate will be limited to 3Gb/s. For a 7200RPM HDD, this bandwidth limitation has negligible real-world impact since the drive cannot saturate even SATA 3Gb/s. Form Factor: 3.5-inch Interface: SATA 6Gb/s (compatible with SATA 3Gb/s) Power Connector: SATA 15-pin Dimensions: 146.99 x 101.6 x 26.11 mm * Weight: Approximately 700g The drive supports RAID configurations (0, 1, 5, etc.) when used with a compatible hardware RAID controller or motherboard RAID feature.

Product Info

The ST500DM002 has been on the market since the early 2010s and remains available as a budget-friendly option. Its market position is firmly entry-level, competing with other 500GB 7200RPM HDDs from Western Digital and Toshiba. At around ¥3,000, it offers the lowest cost per gigabyte among internal desktop drives. Key specifications: Capacity: 500GB Spindle Speed: 7200RPM Cache: 16MB Interface: SATA 6Gb/s Average Latency: 4.16ms Operating Power: ~6.5W Idle Power: ~5.0W Warranty: 2 years

Best Use Cases

  1. Budget Desktop Builds Pair this HDD with a small SSD for the OS and use the ST500DM002 for games and media storage. For users on a tight budget who need more than 120-240GB of storage, this is a cost-effective solution. However, do not use it as the sole system drive if you value fast boot times. 2. Backup and Archival Storage This drive is excellent for storing backups of important files, photos, and videos. Its low cost per gigabyte makes it ideal for archiving data you don't access frequently. In a multi-drive configuration, it can serve as a nightly backup target. 3. Upgrading an Old PC with a SATA HDD If your old computer still uses a 5400RPM laptop drive or an aging desktop HDD, swapping in the ST500DM002 can provide a noticeable speed boost. It's a drop-in replacement for any 3.5-inch SATA hard drive. 4. Quiet, Low-Heat Storage With an operating power of just 6.5W, this drive generates less heat than many 7200RPM alternatives. It's suitable for cases with limited airflow or for users who prioritize low noise and power draw. ## Alternatives
    Western Digital WD5000AAKX (Blue) is the primary competitor. Both are 500GB, 7200RPM, 16MB cache drives with SATA 6Gb/s. Performance is nearly identical, but Seagate emphasizes AcuTrac servo technology for reliability. The choice often comes down to price and availability. Toshiba DT01ACA050 (formerly HGST) is another alternative but less readily available. It also offers similar specs but may have slightly different vibration tolerance or acoustic characteristics. For those open to spending a bit more, a 1TB drive like the Seagate BarraCuda ST1000DM010 offers double the capacity for about 1.5x the price, providing better value if you need more space.

Things to Consider

First, understand that this is a mechanical hard drive. Sequential read/write speeds top out around 150MB/s, which is roughly one-third of a typical SATA SSD. If you need fast load times for games or applications, invest in an SSD instead. Second, 500GB may not be enough for gamers or creative professionals. Modern games can exceed 100GB each, so you'll fill the drive quickly. Consider whether a 1TB or larger drive better suits your needs. Third, this is a relatively old model released in 2011-2012. While still sold new, supply is dwindling. If you find it at a good price, it's a fine purchase for backup purposes, but for primary storage, newer drives often offer better reliability and cache technology. Finally, remember that HDDs are mechanical and susceptible to shock and vibration. Handle with ca