Generally, fatal hard disk drive failures can be classified in (a) failures due to general aging and hardware abrasions and (b) sudden failures because of extreme external incidence (as a fall of or very high environment temperature). Apart from the latter, between 60% and 70% of all sudden hard disk drive failures can be forecasted by S.M.A.R.T. technology nowadays if the S.M.A.R.T. status is appraised in regular intervals not larger than 3 hours.
S.M.A.R.T. is the abbreviation for Self Monitoring Analysis and Reporting Technology and specifies the ability of modern hard disk drives to measure or record operational status parameters such as ”power on/off cycles”, "number of reallocated sectors", "head flying height", "drive temperature" etc. that are known to have impact on the reliability and remaining lifetime of the device.
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