HDData
Hard Drive Temperature and Hard Drive Reliability.
 

Heat has a major effect on drive reliability.
Disk drives are complex electro-mechanical devices that can suffer performance degradation or failures due to a single event or a combination of events occurring over time. Environmental conditions that affect drive reliability include ambient temperature, cooling air flow rate, voltage, duty cycle,  rpm, shock,  vibration, and relative humidity. Fortunately, it is possible to predict certain types of failures by measuring environmental conditions. One of the worst enemies of hard disk drives is heat. Within a drive, the reliability of both the electronics and the mechanics (such as the spindle motor and actuator bearings) degrades as temperature rises. Running any disk drive at extreme temperatures for prolonged periods of time is detrimental and can eventually lead to permanent data loss.
Heat can build up within computer systems due to a clogged fan, failure of air conditioning in a room, operating more drives than the cooling system can handle, and so on. Unfortunately, these conditions can go completely unnoticed until a failure occurs. Because of the essential nature of today's workstations and servers, such risks are unacceptable for many users. What is needed is a way to identify high-temperature situations before they affect data integrity. HDData is the solution !
HDData has specially designed to identify the high temperatures, HDData will warm you and HDData will take actions for you.
HDData Protects your Data and your Drives.

Figure above shows the dramatic effect that temperature has on the overall reliability of a hard disk drive. Derivations from a nominal operating temperature (assumed to be maintained over the life of a drive) can result in a derivation from the nominal failure rate. As the temperature exceeds the recommended level, the failure rate increases two to three percent for every one degree C rise above it. For example, a hard disk drive running for an extended period of time at five degrees above the recommended temperature can experience an increase in failure rate of 10 to 15 percent. Likewise, operating a drive below the recommended temperature can extend drive life.

 
S.M.A.R.T. Hard Drive information.
 
S.M.A.R.T. stands for Self-Monitoring Analysis and Reporting Technology.
S.M.A.R.T. technology was developed by a number of major hard disk drive manufacturers in a concerted effort to increase the reliability of drives. It is a technology that enables the PC to predict the future failure of hard disk drives. S.M.A.R.T. technology has become an industry standard for hard drive manufacturers.
 
Through the SMART system, modern hard disk drives incorporate a suite of advanced diagnostics that monitor the internal operations of a drive and provide an early warning for many types of potential problems. When a potential problem is detected, the drive can be repaired or replaced before any data is lost or damaged.
 
The S.M.A.R.T. system monitors the drive for anything that might seem out of the ordinary, documents it, and analyzes the data. If it sees something that indicates a problem, it is capable of notifying the user (or system administrator).
The SMART setting must be enabled in the Computer BIOS and/or there must also be some kind of software running on your computer to sense the SMART warnings and pass it trough the users.
HDData fills the cap. HDData senses besides the Temperatures also  the possible SMART failures and passes them through to the computer user or administrator whom can take proper actions. If the Computer is unattended HDData can take the proper actions.
S.M.A.R.T. monitors disk performance, faulty sectors, recalibration, CRC errors, drive spin-up time, drive heads, distance between the heads and the disk platters, drive temperature, and characteristics of the media, motor and servomechanisms. The errors the system can detect can be predicted by a number of methods. Currently the SMART system can detect about 70% of all hard drive errors.
 
Unfortunately not all S. M. A.R.T, parameters are used by every Hard Drive Manufacturer similarly. So is the Power On attribute at one of the Manufactures expressed in minutes where another Manufacturer the same attribute expresses in hours. This Power On attribute is reset to 0 by certain manufacturers, after a fixed period.
 
For a complete list of the S.M.A.R.T. attributes you can download the SMART Attributes Annex.pdf