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We are going to focus on
the hard drive
which is the storage
device by excellence, and the most
widely-used due to its good value for money.
It is also one of the most complicated devices
when it comes to recovering its information.
The hard drive
is the computer device or component that stores
all the information as well as the operating
system.
All magnetic devices,
hard drives, cartridges, Jaz, Zip and diskettes,
use 512-byte sectors,
so it does not matter what the operating system
is when carrying out a recovery.
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They are the only magnetic
storage devices that have mobile parts.
These parts are:
· Heads
·
Motor
· Electronics
· Platters
· Firmware
(operating system)
We will make a brief
description of these and their most
common faults below.
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This is one of the most
sensitive components and the main
mobile head of the disc. The heads
work by varying their position in the disc
to be able to access the information that
we need. The increase in magnetic density
and the signal recovery systems mean that
the operation of these components has to be
programmed and adjusted. This will be adapted
in each case after factory assembly (Hyper
tuned). The operation system consists
of a copper coil within a magnet (voice
coil), which, depending on the current
applied to it varies its position to access
the required information. On the tip of this
part are the ceramic
parts which are the devices that are sensitive
to the magnetic fields that comprise
the information. Due to the weakness of the
signal generated by these magnetic fields,
the head has a signal
amplifier housed in the head assembly.
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| The motor
of a hard drive also
called spin, is a self-rotating
spindle, supplied by pulse train generators
to maintain an exact
speed.
The motor
is generally comprised of three
sets of coils placed opposite each other,
which transmit the movement to the central
spindle that supports the disc platters.
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