Hard Disk Drive Complete structure

1
Farooq Khan
֎ Asad
֎ Safwan
֎ Basit
֎ Rehmat
& his
Team

 It is a storage device that used
magnetically platters to store data,
instruction and information.
 The Desktop and notebook
computer contains 1 or more hard
disks.
 It have storage capacity from 40 GB to 1.5
TB and more.
 A Hard Disk that is mounted inside the
system unit sometimes is called fixed-disk.
2

 A Hard Disk which can remove the
medium from one computer and carry it
to another computer is called Portable-
disk.
 Hard Disk store data by two ways:
 Longitudinal Recording .
 Perpendicular Recording .
3

Longitudinal Recording
 Hard disks stored data using,
longitudinal recording , which aligned the
magnetic particles horizontally around the
surface of the disk.
4

Perpendicular Recording
 Hard disks stored data using, perpendicular
recording , which aligned the magnetic
particles vertically or perpendicular around
the surface of the disk .
5

Components of Hard
Disk
 These are some components of hard disk
:
 Platters .
 Disk case.
 Read/Write Head .
 Cylinder .
 Spindle .
 Disk cache .
6

 Platter : It is a circular, metal disk that is
mounted inside a hard disk drive. It is made
of aluminum, glass, or ceramic and is coated
with an alloy material that allows items to be
recorded magnetically on its surface.
 Before writing data , the hard disk must
be formatted .
7

 The process of dividing the disk into tracks
and sectors , so that the operating system
can store and locate data and information on
the disk is called Formatting .
 A narrow recording band that forms a full
circle on the surface of the disk is called
Track.
 The disk’s storage locations consist of pie-
shaped sections, which break the racks
into small arcs called sectors .
8

 The smallest unit of disk space that
stores data and information is called
Cluster .
9

 Disk Case : The rectangular shaped disk case
holds all of the components of a hard disk drive
.
 Read/Write Head : A read/write head
 is the mechanism that reads items and
writes
 items in the drive as it barely touches
the disk’s recording surface .
10

 Cylinder :A cylinder is the vertical section
of a track that passes through all platters .
11

 Spindle : The spindle holds the platters
together and the motor rotates the platters
at their designated speed, which is
measured in RPM.
 The platters in the hard disk rotate at a high
rate of speed. This spinning, which usually is
5,400 to 15,000 revolutions per minute (rpm)
.
13

 Disk cache : sometimes called a buffer,
consists of a memory chip(s) on a hard disk
 that stores frequently accessed items such
as data, instructions, and information .
14

Head Crash
 A head crash occurs when a read/write head touches the
surface of a platter, usually resulting in a loss of data or
sometimes loss of the entire disk. Dirt, hair, dust, smoke, and
other particles could cause the hard disk to have a head crash
.
15

Hard Disk Drive Complete structure

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Similar to Hard Disk Drive Complete structure

Similar to Hard Disk Drive Complete structure (20)

More from MuhammadFarooq486

More from MuhammadFarooq486 (10)

Recently uploaded

Recently uploaded (20)

Hard Disk Drive Complete structure