How to Check an HDD for Bad Sectors with HDDScan
Use HDDScan's SMART information and non-destructive surface tests to investigate a hard drive, interpret slow or unreadable blocks, and protect your data.
Browse more Explore Advice Computer guides, practical tips, troubleshooting advice and helpful information for choosing, setting up and using your devices.
Use HDDScan's SMART information and non-destructive surface tests to investigate a hard drive, interpret slow or unreadable blocks, and protect your data.
Install IObit Smart Defrag from the official source, analyze an HDD, choose an appropriate optimization mode, and avoid treating SSDs like mechanical drives.
Recognize read errors, SMART warnings, corrupted files, slow areas, and other bad-sector symptoms—and learn what to do before testing a failing drive.
The old MyDefrag workflow is no longer recommended. Learn what its options did and how to optimize HDDs and SSDs safely with supported Windows tools.
Learn how file fragmentation affects HDD performance, why SSDs are different, and how Windows Optimize Drives handles each storage type automatically.
Use fsutil to check Windows delete notifications, enable TRIM when needed, and let Optimize Drives handle SSD retrim on a safe schedule.
Verify Windows TRIM notifications, review the SSD retrim schedule, and run a repeatable speed test without confusing benchmark results with drive health.
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