MHDD is the most popular freeware program for low-level HDD diagnostics. MHDD supports these interfaces: IDE, Serial ATA, SCSI. Developed by Dmitry Postrigan
License: Free
MHDD is ideal for users looking for a straightforward tool focused on HDD diagnostics, offering a simple interface and effective SMART monitoring. In contrast, HDDScan is a more versatile tool that supports both HDDs and SSDs and includes advanced features like a file system check and a disk wipe function.