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HDDScan is a free HDD and SSD diagnostic tool for Windows. It is mainly used to detect storage-device errors, bad blocks/bad sectors, read and analyze S.M.A.R.T. information, and monitor temperature as well as read/write performance. It supports traditional HDDs, some SSDs, USB/FireWire external drives, USB Flash drives, and RAID volumes. Its positioning is closer to a local repair and IT operations diagnostic utility than a cloud-based development platform.
In terms of features, HDDScan provides several surface test modes, including linear verification, linear reading, linear erasing, and Butterfly reading. It can generate speed graphs, response-time maps, and reports. For SMART, it supports attribute analysis for ATA/SATA/USB/FireWire HDDs, can read Log Pages from SCSI devices, and can run three types of SMART tests: Short, Extended, and Conveyance. Additional capabilities include reading device identity information, temperature monitoring, adjusting AAM/APM/PM parameters, viewing SCSI defect information, spindle start/stop, saving/printing MHT reports, and command-line mode.
System requirements cover Windows XP SP3 through Windows 10; the main documentation does not mention Windows 11, macOS, or Linux. On the device side, it supports IDE/ATA, SATA, and SCSI/SAS HDDs, certain USB/FireWire controllers, SATA/ATA SSDs, and RAID volumes. However, RAID volumes and USB Flash drives only support surface testing; only one test can be run at a time; and Verify mode may be unreliable on USB/Flash devices. Erase mode overwrites data irreversibly, so it carries a relatively high level of risk and requires caution.
Pricing is very clear: it is freeware. No paid version, subscription, or enterprise licensing information is shown. It does not disclose any open-source status, nor does it provide an API/SDK. However, it does support command-line use and can generate .cmd or .bat files to execute parameter changes in the background. Its ecosystem is mainly reflected in hardware compatibility lists, including various USB/FireWire controllers and SSD controllers, rather than the plugins, CI/CD, or monitoring-platform integrations commonly seen in modern developer tools.
Its advantages are that it is free, offline, and runs locally, while offering a broad range of diagnostic dimensions. It is suitable for individual users, PC repair technicians, and IT operations staff who need to perform an initial health check before data recovery. Its drawbacks are an older-looking interface and dated system support. Although the documentation is detailed, it reads more like a manual, and there is little information about modern support channels. The main documentation also provides insufficient detail on compatibility with newer systems and hardware.
The main documentation does not provide information about access from mainland China, mirrors, or payment methods. Since it is a free software download tool, payment issues are less relevant. If the official website is inaccessible, consider using diagnostic tools from your system manufacturer or similar disk health-checking software as alternatives.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on hddscan.net official site.
hddscan.net is an Unknown Dev Tools provider. TG4G tracks its product information, an overall rating of 8.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach hddscan.net directly.