Hard drive is one of the
most important part of a computer system. It is used to save, read
and write the data that we want to store for future use. Hard drive
has all the applications that we have installed and most importantly
hard drive has the operating system. So error in hard drive can make
a huge data loss to us.
There
can be a many reasons for crash or error in a hard drive like a
physical defect or a logical defect.
What
happens when a hard drive gets a logical defect?:
Logical
defect in a hard drive occurs when their is problem with the file
system or with the boot master of the system. When the file system or
master boot gets affected then we can say that hard drive has logical
defects. When your Mac is not booting up or it starts loading and
gets shutdown during loading then their is a problem either with
the
file system or the boot master of Mac.
Viruses can also affect the file systems. They can corrupt or damage
the files of the file system.
To
know more about file system error you can check link
http://data-recovery-tool.blogspot.in/2012/07/how-to-resolve-file-system-error-on-mac.html.
Firmware
corruption of the hard drive:
This
error can occur if their exists any defects in the code which
controls the hard drive. If the firmware becomes corrupted or
defected, the hard drive becomes unreadable to the computer.
Hard drive will spin but the system will not boot up if its firmware
gets corrupted. And even
if the system starts booting it will hang in between the process.
Electronic
Failure of hard drive:
Electronic failure can occur if the controller board of the hard
drive gets defected. Problem in the controller board of the hard
drive makes it undetectable to the BIOS. Because of this failure,
system will unable to boot.
Physical
defects in hard drive:
Physical defects in the hard drive makes it inaccessible to access.
We may get to know that hard drive is physically defected if hard
drive makes a ticking or clicking noise. Physical defects can also
cause a huge data loss to us.
If
we got affected with any of the above mentioned defects then we
should use the data recovery methods to recover data.
There are many
firms that are providing the data recovery services. To get the best
data recovery services I recommend to check this link
http://data-recovery-software-review.toptenreviews.com/.