Hard Drives are not one of the most reliable devices. There are chances that it might suddenly fail one day resulting in loss of our precious data. ActiveSMART is an industry leading S.M.A.R.T. diagnostic and failure prediction software for hard drives. It uses S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) to monitor the health status of Hard Disk Drives, monitors the drives temperature, prevents data loss and predicts possible drive fails, using special algorithms.

It sits quietly in the background and monitors the SMART status of your hard drives. If any of the parameters changes, it warns you. It will also display the TEC ( Threshold Exceed Condition) date, the date at which SMART estimates your drive will fail, should one appear for a given parameter. It also handy for checking your basic disk info such as partition sizes, support for DMA and PIO modes and the current temperature. You can also trigger a warning if the drive gets too hot. Every change is logged so you can always see a history of what is going on. Warnings can be simple pop up messages, emails or network messages

The trial version works for 30 days and the full version will cost you $24. Though it certainly has some useful features, how accurate it really is, it is hard to tell. But it is definitely a good tool to keep track of your hard disk.

Thanks to Abhishek for recommending me this.