MHDD is described as 'The most popular freeware program for low-level HDD diagnostics' and is a hard disk diagnostic tool in the os & utilities category. There are more than 10 alternatives to MHDD for Windows, Linux, MS-DOS, Mac and BSD. The best MHDD alternative is GSmartControl, which is both free and Open Source. Other great apps like MHDD are HD Tune, Hard Disk Sentinel, Victoria and HDD Regenerator.
DHE DriveInfoshows HDD information: Manufacturer, Product ID, Serialnumber, Firmware, ATA-Standard, BUS Info (S-ATA 150/300/600, P-ATA, USB, SCSI), Size, Buffer Size, Rotation Rate, Formfactor, Features, AAM, APM, Master Boot Record, Disk ID, Bootloader
Lm-Sensors is a free and open-source application that provides tools and drivers for monitoring temperatures, voltage, and fans.
StableBit Scanner is a state of the art disk health monitoring tool.
Active@ Hard Disk Monitor is a disk utility that checks and monitors the status of your hard drives to help prevent data loss. The system is based on the Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.).
DRevitalize is a program that repairs bad sectors (physical defects) on popular magnetic media (hard drives and also floppy drives to some extent) by generating a special sequence of high and low signals around the physically damaged area.
Monitor the physical condition and temperature of your disks 24/7. Predict remaining service life. See the current percentage of your disk's remaining life. Support for most solid-state drives and hard disks.
CheckDrive warns you before you lose all your data! Never be surprised by a hard drive failure again! Shows you the health status of your plates Informs you in case of problems.
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Only monitors temperature, does not do any advanced monitoring or active tests