COMMON REASONS FOR A HARD DRIVE CRASH

There can be many different reasons for a hard drive crash.
It can occur gradually over time or abruptly.
A hard drive has the potential to last for many years before malfunctioning.
However, as with any mechanical device, a hard drive can and will eventually wear down.
Sometimes this can happen sooner than expected.

Physical damage is the leading cause of premature hard drive failure.
When a hard drive is powered off, the read-write heads park on a special area
of the platter that protects the heads and platter from damage.
When a hard drive is powered on, the heads are designed to move back and forth
across the platter surface.  If a hard drive suffers any physical damage during this time
(such as bumping or knocking), it is more likely it will suffer a head crash.
A head crash is one of the most common reasons for drive failure and occurs
when the read-write heads make contact with the platter surface where the data is stored.

Also located inside the hard drive is a motor that provides power to the platters
and other moving parts inside the drive.  this is common problem with Seagate Barracuda models.
not many hard drive companys have a knowledge how to resolve that big data recovery problem.
Over time, the motor will eventually wear down causing the parts to move at incorrect speeds.