Last year recovery Labs carried out an internal technical
study where the different reasons that caused the loss of data were analyzed.
This study collects data from damaged hard drives and various devices received over
the past year.
The data obtained is surprising, since almost half of the
data losses that occur are due to the operation of hard drives themselves,
human error being the second most important cause. Viruses, curiously, do not
represent a particularly relevant cause (7.8%).
Another piece of information provided by the hard drive
providers themselves is that approximately 4% of the hard drives sold in Spain
suffer some failure during the first year.
These data show us that no matter how advanced our
company's backup system is, no one is safe from suffering data loss. 80% of
customers who have requested data recovery.
Given these expectations, some offers its data recovery
service, which has become an indispensable service for many companies and
individuals, since the information they store on their hard drives is often
vital.
Data
loss
Loss of data is a situation in which we cannot access
important data stored in a computer system.
It can occur for any reason, a breakdown, a human error, an
accidental or provoked deletion, natural disasters, fires, blows, repair hard
disk etc. Data loss is most often caused by physical failure, followed by human
error.
The breakdowns that can occur in a hard disk or any other
storage device are very diverse: voltage spikes, engine failures, viruses,
repair hard disk.
Below we describe some of the most common problems that
come to our labs.
Damaged
hard drive
Damaged
hard drive: VOLTAGE SPIKES
They occur when a failure in the power supply or an overload
of the electrical network, cause a voltage surge that burns the electronics of
a device.
Generally, the components with the highest consumption are
those that are affected first, the damage becoming visible to the naked eye. In
these cases, the coils of the devices are usually affected, which are generally
housed in the heads and motors, vital parts of a hard disk.
In these cases, some users trust that a change in
electronics for a similar one can solve the problem, but this "trick"
only works on rare occasions. It must be taken into account that a coil
communicated by a voltage spike can become permanently short-circuited, and may
even damage the replaced electronics. In addition to the damage that can be
caused to the surface of the hard disk due to the lack of adequate conditions
for its start-up.
Damaged
hard drive: MECHANICAL FAILURES
Hard drives have moving parts, which can be damaged like
any other device.
The most common mechanical problems are caused by the
continuous expansion and contraction of the hard disk, due to the successive
process of heating and cooling of the devices. A common example is the fact
that on many occasions someone unmounts a hard drive from a computer to mount
it on a new computer and it stops working. This is because the hard disk has
been under stress for some time, and it gives way when it stops receiving it,
causing the heads to have the wrong position when trying to read.
Another very common fault is the communication of one of
the coils that make up the discs. The threads that make up these coils are
covered with a varnish that isolates them from each other, and can be damaged
by temperature variations, losing the device's effectiveness of some turns when
horizontal displacement fails, so that our hard disk would be damaged. In the
case of communication of any motor coil, the problem translates into loss of
rotation turns, being a problem that makes data recovery much more difficult to
carry out.
The reels that are least affected by communication problems
are the readers and writers that are housed in the tips of the head, but these
heads are the parts most sensitive to shocks or inappropriate stops and are the
source of many problems.
A very common problem that usually affects the heads is the
degradation of the magnetic support itself, since it is covered with a very
fine lubricant that over time loses its powers and degenerates into dust
particles that ends up covering the resonance holes of the heads, preventing
them from reading correctly.
The most famous of the breakdowns that affect the heads is
known as landing, or technically "head crash ". This breakdown
consists in that the heads accumulate an excess of particles in the area that
is in contact with the magnetic support, and end up eroding it, so that all the
magnetic enamel that contained the data disappears, leaving only the aluminum
of the plates. Frequent culprits of these cases are usually the wear of the
discs, the accumulation of humidity or tobacco smoke.
Damaged
hard drive: LOGICAL FAULTS.
These breakdowns are very common, and can be caused by user
errors, virus action, system crashes, or internal sabotage actions. In some
cases, when for any reason, a computer does not respond and it is necessary to
restart it, there is usually a cache or ram download to the disk and if the
computer has been blocked for a while, the disk heads are placed in the zone of
start of the disk by performing this data download in an inappropriate area,
rewriting the partition tables and the boot sector, being then impossible to
boot the system in a normal way.
A system very similar to this is the one that viruses use
to disable systems, attacking these vital areas of the disk, generally the
partition table and boot sector.
In other cases, the user makes the mistake of formatting or
partitioning the wrong drive. This is a very common case when installing second
drives in systems, and confusion is compounded if you have multiple partitions.
Another very common failure is the accidental deletion of folders or documents.
This type of data loss can also be due to premeditated action.
Conclusion:
So, basically most ways due to which data loss is because
of hardware failure followed by human error and viruses. But no worries all
ways can’t delete all your data because we have data recovery software which will
help in recovery.
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