MHDD is the most popular freeware program for low-level HDD diagnostics. MHDD supports these interfaces: IDE, Serial ATA, SCSI. Also there is a possibility to access an USB storage, there are drivers for emulation (USB->SCSI).
Victoria - An experimental program to work with HDD. Victoria is a small application designed to assess performance, test and perform minor repairs to your IDE drive and SATA HDD.
SeaTools is a diagnostic tool that helps you determine the condition of the disk drive in your external hard drive, desktop or laptop computer. The installation needs dot.NET 4 as a precondition. If dot.
Pc-Check will scan for errors in all hardware components on the computer it is being deployed on and display diagnostic results.
CommercialWindows
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