Hard Disk Sentinel is a multi-OS hard disk drive monitoring application. Its goal is to find, test, diagnose and repair hard disk drive problems, display hard disk health, performance degradations and failures. Hard Disk Sentinel gives complete textual description, tips and displays/reports the most comprehensive information about the HDD inside the computer or in an external enclosure (USB / e-SATA). Many different alerts and report options are available to ensure maximum safety of your valuable data. Hard Disk Sentinel monitors hard disk status, including health, temperature and all S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology, built in most hard disks today) values for each hard disks. Also it measures the hard disk transfer speed in real time which can be used as a benchmark or to detect possible hard disk failures, performance degradations.

Here are some key features:
· Easy to use interface
· All information are displayed in the main window of the application. Quick controls allow easy navigation to access all hard disks, partitions and different information. Intuitive user interface elements display information by using green/yellow/red color to indicate the level of problem. Detailed text description and context sensitive help guides the user thru the features and options.
· 1. Install > 2. Configure > 3. Stay protected
· Just install, configure alerts and backup options and your system is now safe. You'll be notified about the problems - but if everything is correct, Hard Disk Sentinel just sits on tray and displays current status. The data is protected even in 24 hours daily, 7 days a week.
· Instant S.M.A.R.T. analysing - Hard Disk Sentinel can communicate with IDE, Serial ATA and SCSI hard disks to detect their status and temperature. Disk status are displayed immediately as you launch the application, there is no need to analyse disks for a long period. It displays the current and maximum temperature for the hard disk.
· It can read all general and vendor-specific attributes and monitor their values. For advanced users, all raw data are displayed also including power-on hours or number of read/write errors. Hard Disk Sentinel interprets the performance and fitness related S.M.A.R.T. values and displays the calculated Performance and Health percentage, total power on time and estimated lifetime remaining.
· Disk status in Windows Explorer - View the current health status and used space in Windows Explorer or in any other application, so you'll always know the amount of used space for each partitions and the disk condition.
· Information on demand - It can display current hard disk temperatures and health on the system tray, in a small status window and on the desktop itself. Average and maximum temperatures are logged for all hard disks and these informations are displayed in graphs for statistical purposes.
· Logging - Hard Disk Sentinel logs all degradations in all SMART parameters. For example, if a new uncorrectable sector is found on your hard disk, you will be notified.
· Alerts - Hard Disk Sentinel can make different kind of alerts upon different problems. It can execute various tasks (even external applications) in case of a problem. There is an option to send daily emails about current status.
· Hard Disk Details - Detects and displays every information about the hard disk, from the revision number and buffer size to all features it has. The maximum available and current transfer modes are also displayed.
· Hard Disk Performance - Logs how much data were read from or written to the hard disk. Displays current transfer rates for both reading and writing and estimates the maximum available (theoretical) transfer rate for a particular hard disk.
· Hard Disk Partitions - Displays partitions for each physical hard disks and type and usage informations about them so you cannot run out of space. Hard Disk Sentinel sends this information automatically in alert/status messages.
· Shutdown - It offers option to shut down the computer on failure, overheat or parameter degradation. This option can be used to prevent further data loss.
· Acoustic Management - It offers option to control the acoustic level of IDE/S-ATA hard disk. It is possible to increase performance or make the disks more silent.
· Clock Synchronization - It offers option to synchronize the PC clock with an atomic clock via NTP (Network Time Protocol).
· Improvements - Hard Disk Sentinel is constantly improving. More features will be available soon. If you have any idea which can be useful, just let us know.

Changes in Hard Disk Sentinel 4.40 (11/07/2013):

Improvements and new features:
- displaying health (actual and original) during Disk -> Surface test functions
- improved display of S.M.A.R.T. attribute changes: automatically showing more dates based on screen resolution
- double click on S.M.A.R.T. attribute graphs to toggle showing all measured values
- right click on S.M.A.R.T. attribute graph to export all displayed values
- improved hardware self tests (Short self test, Extended self test) on various internal and external drives (previously reported “Interrupted with hardware/software reset” caused by special power management implementations)
- improved report of hard disk status and attributes for SCSI / SAS hard disks
- improved re-adjust Automatic Acoustic Management / Advanced Power Management levels on startup when required
- improved “sending files in e-mail” project
- log data communication errors
- added Slovak language support (thanks to Lukas Surin for translation)

Improved hardware support:
- added support of Seagate External hard disks, newer Seagate USB hard disks, FreeCom external hard disks
- added support of Adaptec 7xxx series RAID controllers in RAID mode: detection of complete hard disk status when SATA or SAS hard disks configured as RAID arrays.
- added support of Adaptec 2200S, 2120S, 2130S, 2230S SCSI controllers in RAID mode: detection of complete hard disk status when SCSI hard disks configured as RAID arrays.
- added support of PROMISE SuperTrak RAID controllers in RAID mode: detection of complete hard disk status when SATA hard disks configured as RAID arrays.
- added support of PROMISE FastTrak RAID controllers in RAID mode: detection of hard disks in the arrays and their general S.M.A.R.T. status
- added support of PROMISE enclosure information: displaying fan speed, temperature and voltage provided by the Promise enclosure
- added support of IBM M1115, SuperMicro SMC2108 RAID controller: detection of complete hard disk status when SATA hard disks configured as RAID arrays.
- added support of HighPoint RS5122B USB docking station
- added support of HighPoint Datacenter DC7280 controller
- general improvements for external USB 3.0 multi-drive enclosures
- improved support for Win XP 64 bit & different RAID controllers (Gigabyte, VIA, JMicron, etc.)
- improved support of JMicron USB 3.0 / eSATA RAID enclosures
- improved support of LSI, Intel SAS/SATA RAID controllers, displaying hot spare and unconfigured drive(s)
- improved support of HighPoint, Areca, LSI RAID controllers
- improved support of various hard disks (high capacity, 2-3-4 TB models) and newer SSD models (ADATA, OCZ, Samsung, Plextor, etc)
- improved compatibility for various card readers, pendrives
- improved detection of standalone (non-RAID) hard disks with HighPoint and Areca cont

Bug fixes, further modifications:
- fixed: service mode startup problems on some non-English Windows systems
- fixed: previous versions may displayed error at startup if WMI libraries damaged / corrupted
- fixed: webStatus displayed partial information if Intel SSD used in the system
- fixed: disk-specific settings were not saved for some Intel SSD models
- fixed: startup may failed when Acronis software used to split 2+ TB hard disks
- fixed: Portable version startup after uninstallation of license from the actual system
- fixed: custom icon set setting may reset after standby