DiskMaster vs ValiDrive

DiskMaster is a free desktop application for monitoring drive health on Windows, Linux, and macOS. It reads SMART attributes, self-tests, and test logs, then calculates a health score out of 100 and shows which attributes account for deductions; performance has a separate score. It stores readings in SQLite and charts changes, with alerts for shifts such as increasing drive counters. A read-only surface scan times blocks, rereads unreadable sectors for confirmation, and maps them to sectors. DiskMaster can identify files associated with those sectors and try to rescue copies while skipping unreadable bytes. Optional repair tools include sector and filesystem repair, zero-fill, and sanitizing bad sectors the filesystem marks as free. Alerts can go to Slack, Discord, ntfy, email, desktop notifications, commands, or JSON webhooks. Its CLI exports text, HTML, JSON, and CSV reports. SATA and USB monitoring needs no third-party tools; NVMe health logs and macOS use optional smartmontools. Raw SMART access requires administrator or sudo privileges.

ValiDrive is a free Windows utility for quickly spot-checking USB mass storage drives for deliberately missing storage. It tests 576 evenly spaced locations with random data, checking whether each location can store and retrieve information. Before testing a region, it reads the original contents and rewrites them afterward, restoring what was there. The utility detects internal RAM caching and adjusts transfer size when needed to bypass it. A drive map labels each tested location as validated, read error, write error, or no storage. The final report summarizes read and write access times with minimum, maximum, average, median, and variance values. The maker describes this as a quick, cursory check rather than a comprehensive deep test of storage media. While running, it briefly checks for updates through an anonymous DNS query but does not update itself automatically. Listed releases are v1.0.0 from October 6, 2023 and v1.0.1 from October 8, 2023.