| 1.-
The data storage media.
2.- What is a hard drive?.
3.- The hard drive partitions.
Hard
Drive recovery - Data Recovery
1.
The data storage media
Storage
media are magnetic storage devices where data that we need
to use is held, such programs, documents, files, folders...
Kinds of storage media:
- Hard
drive (hard disk)
-
Floppy Disk
-
ZIP/ JAZ devices
-
CD-Rom
- DVD
-
Magnetic and optical device
2.
What is a hard drive?
The hard
drive is an electro-mechanical and magnetic storage device
that is usually inside the computer. It stores all personal
data, operating systems, programs, files, documents...
Main components of the hard disk:
ROTATING DISCS WITH MAGNETIC SURFACE:
Also called magnetic plates. Each
one has a number of tracks where data is stored, EG applications
or programs.
READING HEAD: There is one
in each plate, or depending on the number of plates of each
hard disk there may be a number of heads. These read information
from, and write information to, your hard drive.
MOTOR: this moves the head and spins the magnetic
plates looking for the data stored in specified tracks and
sectors..
Storage capacity is measured in bytes, kilobytes (Kb), megabytes
(Mb) or Gigabytes (Gb). The greater the storage capacity of
the hard disk, the greater will be the structure storing the
data.
The working of the hard disk is controlled by an electronic
card called the PCB.
3. The hard
drive partitions
What is a partition?
Partitions on the hard drive are the means
of dividing the physical drive into several logical drives.
Or another way of putting it is to say that when we partition
a hard drive, we divide the drive into several independent
parts, creating the illusion of different drives, when it
is really a single physical drive. A partition is one of these
divisions of the drive.
Why are used the partitions?
Drives need to be partitioned so that the
data is stored in an orderly fashion so that the Operating
System understands and can find the location of any data.
There are many kinds of format which depend mainly on the
Operating system used: |
