MHDD

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).

This software can make precise diagnostic of the mechanical part of a drive, view SMART attributes, perform Low-level format, bad sector repair, different tests and tens of other functions.

Links:

MHDD FAQ

MHDD Documentation

Change log

Last version of MHDD, self-extracting floppy image

Last version of MHDD, CDROM iso-image

Last version of MHDD, just-an-archive (MS-DOS executables only, no SCSI support)

Magic Boot Disk with MHDD

MHDD 4.5 (older version, but includes ATA/SCSI Terminal):

MHDD 4.5, self-extracting floppy image

MHDD 4.5, CDROM iso-image

MHDD 4.5, just-an-archive (MS-DOS executables only, no SCSI support)