Hard Disk Sentinel is an application designed to monitor hard disks activity and track temperature, thus helping you prevent damage and data losses.
You may find the program a bit difficult to use when you first load it, but it's only because it sports a lot of features,  showing valuable information basically anywhere you look.
Drives and partition are listed on the left side, along with health, temperature and free space, so it's easy to pick one and find more information about it.
On the other hand, the rest of the features are organized in tabs, together with detailed explanations to assist you all the time.
The overview tab shows brief information on performance and health, but also power on time and estimated remaining lifetime. Conducting a Surface Test will show even more information and help you fix potential problems, but this feature is only available in the registered version.
The temperature section displays the current temperature for the selected drive, as well as the today average and maximum temperature. Plus, it shows three different graphs with the current, the daily average and the daily maximum temperature.
Disk performance is the section that could prove in handy especially to those who dream about faster transfer rates all day long, showing details such as total data read and write, current, average and maximum transfer rate, but also the estimated maximum transfer rate and the average disk activity.
Hard Disk Sentinel has a comprehensive settings menu to configure hotkeys, disk control, message settings, alerts and even the way the hard disk temperature icon will look in the System Tray.
There are multiple tests available, including Random Seek Test and Surface Test and it's better to close all the other applications before going in there and thus get the best possible results.
All in all, Hard Disk Sentinel is definitely worth the money if you're afraid that something may be wrong with you hard drives. It's just an easy way to make sure you're on the safe side. Or not.

Limitations:
· 30 days trial
· Nag screen

What's New in This Release:
Improvements and new features::
· Disk menu -> Online Warranty Check: verify drive warranty status on manufacturer website
· option to enter comment (tag) for each hard disks
· option to copy single line to clipboard from "Information" page after right-click popup menu
· hard disk surface test improvements
· option to export transfer rate values after surface test
· last detection timestamp displayed on the bottom status line
· added /TXTREPORT [filename], /HTMLREPORT [filename] command line parameters to quickly save complete report
· Reset workload counters function for Intel SSD
· displaying lifetime reads / writes for specific hard disks with support (Seagate, Hitachi, Toshiba)
· option to automatically re-adjust advanced power management / acoustic management settings on startup if required
· added Belarusian language support (translated by Yuri Petrashko)
· added digital signatures to files
Improved hardware support:
· added support for DELL RAID controllers
· added support for HP USB external drives
· ad...