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What you need to know about data loss

What is hard disk crash?

Simply, the hard disk contains the data platters which contain the magnetic bits of user data. The data is read or written by some "flying heads" as close as millionths of an inch to the data platters, with a typical speed in the range of 4,000 to 10,000 revolutions per minute. Due to the extreme intricacies, a dust particle, malfunction of electronic circuit, mechanical fault or impact will cause the flying heads to crash onto the platter surfaces, creating irreversible physical damages and hence permanent loss of data.

You may want to read more information on hard disk essentials and read write head crash from our computer knowledge resource page.

What is data loss?

What is the main cause of data loss?

What is hard disk crash?

What are bad sectors?

How do I prevent losing data?

How to differentiate between physical or logical failure of data media?

I know backup is the best prevention. Are there any other things I should know?