This article covers 東芝 S300 10TB 監視 3.5インチ 内蔵ハードドライブ.

Overview

The Toshiba S300 series is a line of internal hard drives purpose-built for 24/7 surveillance recording systems. The 10TB model HDWT31AUZSVAR adopts CMR (Conventional Magnetic Recording) technology, paired with a SATA 6Gbps interface, 7200RPM spindle speed, and a 256MB cache buffer. It supports up to 64 HD video cameras and carries a workload rating of 180TB per year, making it a solid choice for home security setups and small office surveillance environments that demand continuous write reliability.
Unlike general-purpose desktop HDDs or NAS drives, the S300 is optimized for sustained sequential writes and reads — the typical workload pattern of video recording. It also integrates rotational vibration (RV) sensors to maintain stable performance when multiple drives are installed in close proximity, such as in a DVR or NVR chassis. Toshiba backs it with a 3-year limited warranty, underscoring its design for long-term operation.
In the surveillance HDD market, the S300 10TB competes directly with Seagate SkyHawk and WD Purple series. Its 10TB capacity hits a sweet spot for medium-scale systems with 4 to 8 4K cameras, offering a balanced mix of capacity, reliability, and cost. It sits comfortably in the mid-range tier — not the cheapest per terabyte, but justified by CMR recording and RV sensor robustness.

Compatibility Guide

  • Form factor is standard 3.5-inch, fitting into any desktop PC case or surveillance DVR/NVR that has a 3.5-inch drive bay.
  • Interface is SATA 6Gbps (Serial ATA), backward compatible with SATA II (3Gbps) and SATA I (1.5Gbps) ports. For best performance, connect to a SATA 6Gbps port.
  • Power connector is the standard SATA 15-pin power cable, included with virtually all modern PC power supplies.
  • Most surveillance DVRs and NVRs support 3.5-inch SATA HDDs, but some compact or low-profile models only accept 2.5-inch drives. Always check your device's specifications before purchasing.
  • When installing multiple drives, ensure your power supply unit has enough SATA power connectors and total wattage headroom. The S300 10TB consumes approximately 6.8W at idle and up to 8.0W during seek operations.

Product Info

  • Release: 2019 (still in active distribution)
  • Price: Approximately ¥153,604 on online retailers as of September 2026
  • Warranty: Toshiba 3-year limited warranty
  • Availability: Major electronics retailers and online stores (online retailers, Rakuten, etc.)
  • Recording Technology: CMR (Conventional Magnetic Recording) — not SMR, so rewrite performance remains stable over time.
  • Spindle Speed: 7200 RPM
  • Cache: 256 MB
  • Workload Rate: Up to 180 TB/year
  • Max Camera Support: Up to 64 HD video cameras
  • Rotational Vibration Sensor: Built-in
    Market positioning: Mid-range surveillance HDD. The 10TB capacity is ideal for medium-scale systems with 4 to 8 4K cameras recording 24/7, offering significantly longer retention than entry-level 1–4TB models. While the price per terabyte is slightly higher than high-capacity 14–20TB drives, the CMR technology and RV sensor provide a reliability advantage that matters in always-on recording environments.

Best Use Cases

  • Home Security Enthusiasts: If you run 4 to 8 HD cameras at home and need 24/7 recording, the S300 10TB is a reliable choice. Its CMR design handles continuous writes without performance degradation, and the RV sensor keeps operation stable even if the drive is mounted near other components. Ideal for a single-drive setup in a dedicated DVR or a PC-based NVR.
  • Small Office / Retail Surveillance Managers: For offices or retail stores with 8 to 16 cameras requiring at least 30 days of footage retention, 10TB provides ample space. At 1080p H.265 compression, 16 cameras can record for approximately 14 days; 8 cameras for about 29 days. The 180TB/year workload rating offers plenty of headroom for continuous recording.
  • Upgrading from Smaller Drives: If your current surveillance system uses 1TB to 4TB HDDs and you're running out of space, swapping to the S300 10TB is a straightforward upgrade. The same S300 series means no driver or firmware compatibility surprises — just swap and reconfigure your recording schedule.
  • Who should look elsewhere: If you need a general-purpose desktop HDD for file storage or OS booting, the S300 is not the right choice. Its random read/write performance is lower than desktop-oriented drives like the Toshiba X300 series. For NAS RAID arrays, consider NAS-specific drives such as WD Red Pro or Seagate IronWolf Pro, which are tuned for RAID error recovery and multi-user access patterns.

Things to Consider

  • Not for general PC use: The S300 firmware is optimized for sequential video streams, not random I/O. Using it as an OS drive or game library will result in noticeably slower performance compared to a desktop HDD or SSD.
  • Price volatility: HDD prices fluctuate with currency exchange and supply/demand. The 10TB model has been on the

Product Disclosure (Amazon)

  • Manufacturer: 東芝(TOSHIBA)
  • Seller: 輸入本舗T-market
  • Fulfilled by: 輸入本舗T-market
  • ASIN: B07NTDB9LB
  • Note: This article covers a manufacturer-made product based on Amazon listing details.