Why Hard Drive Fails?

Aside from the colloquial and obvious knowledge that everything built by mankind fails sooner or later, on this matter there are some informative points to be made in the interest of edification. There are two main categories of hard drive failure: physical and logical. Sometimes it's both.

Physical failures can be either mechanical or electronic, but most commonly physical failure is confirmed when the system BIOS does not detect the hard drive. Logical faults have to do with the previously recorded information ("written" upon the drive data storage medium) becoming inaccessible, or in more severe cases, improperly organized. These more severe failures are typically described as file-system corruption.

Hard drive manufactures offer 3-5 years of manufacture warrantee but Customers replace disk drives 15 times more often than drive vendors’ estimate, according to a study by Carnegie Mellon University.

The comparatively high replacement rates are not surprising because of the difference between the "clean room" environment in which vendors test versus the heat, dust, noise or vibrations in an actual work environment. Experts have also seen overall drive quality falling over time as the result of price competition in the industry.

The Google study examined replacement rates of more than 100,000 S ATA/PATA drives deployed in Google's own data centers. They also found that no single parameter, or combination of parameters, produced by the SMART (Self-Monitoring Analysis and Reporting Technology) built into disk drives is actually a good predictor of drive failure.

The nation’s 27-plus million small businesses grow more dependent each day on their computers and computer systems. No matter what the field, today it is almost impossible to do business without having an internet presence and an up-to-date website.

Moreover, most businesses today, from the largest corporations with their huge enterprise systems to the smallest mom and pop business operating with a single computer, store their most vital and irreplaceable business records electronically. These small businesses face a very real crisis, one that a vast number of small business owners simply have not focused on – the always looming possibility that they could suffer a catastrophic data loss, one that could well threaten the very existence of their businesses.

A national Harris Interactive survey of 597 computer users , as reported in Realty Times found:

  1. 25% of users frequently back up digital files, even when 85% of computer users say they are very concerned about losing important digital data.
  2. 37% of the survey's respondents admitted to backing up their files less than once per month.
  3. 9% admitted they have never backed up their files.
  4. More than 22% said backing up information is on their to-do list, but they seldom do it.

For customers running anything smaller than the massive data centers operated by Google or a university data center, though, the results might make little difference in their day-to-day operations. Disasters that threaten a business can happen anywhere at any time. But no matter how it is caused, a loss of data, or no access to data for any kind of extended period, inevitably means a loss of revenue, a loss of productivity, a loss of reputation, and increased costs.

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