COMPONENTS OF COMPUTER
System unit
WHAT IS DATA
DATA REPRESENTATION
WHAT IS BINARY
HOW TO MAKE BINARY
HOW IS A LETTER REPRESENTED IN SYSTEM PROCESSING?
WHAT IS STORAGE?
DIFFERENCE B/W MEMORY & STORAGE MEDIUM
TYPES OF STORAGE MEDIUM
1. Magnetic Tapes
2. Magnetic Disks
3. Optical Disks
Overview of Mass Storage Structure
Disk Structure
Disk Attachment
Disk Scheduling
Disk Management
Swap-Space Management
RAID Structure
Disk Attachment
Stable-Storage Implementation
Tertiary Storage Devices
Operating System Issues
Performance Issues
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
MARUTI SUZUKI- A Successful Joint Venture in India.pptx
HARD DISK DRIVE
1. HARD DISK DRIVE
1. It is a data storage device in a computer.
2. It is a secondary storage device.
3. Its stored in 0 (or) 1.
4. The operating system, software and most
other file are stored in the HDD.
5. Its invented in 1954 by ibm.
6. Now a day, HDD with 3.5 inch or 5.25 inch
platter in different capacities , such as
10GB,20Gb,40GB,80GB
2.
3. Main computers for Hard disk drive
.disk platter
.stepper motor
.spindle motor
.Arm
4. DISK PLATTER
The platter is made up of a magnetic material, in the flat disk part
of the drive.
1. The data stored in the platter.
2. Each set of magnetic particles is collection a unit called a bit.
3. New hard-drive technology uses thin-film metals and glass
platters to increase efficiency and drive storage capacity.
STEPPER MOTOR
1. Use stepper motors for controlling read/write head position.
2. Stepper motors usually use +12V power, but some new low-
power drives use +5V power source
SPINDEL MOTOR
1. It control the platter.
2. Ithis motor rotates at a speed of 3600 to 10,000 r.p.m. 3. All
the platter moves in the same direction.
5. READ AND WRITE HEAD
1. The heads read and write the information to the drive platter.
2. The head writes magnetic information on the platter.
HEAD ARM
1.Using for read and write operation.
Disk structures
(A) Track
(B) Sector
(C) Cylinder
(D) Storage capacity
6. Track:The HDD is divided into number of concentric circlues called
tracks.
Circular path in sector is called track.
Sector: Data storage area in one track multiple divided into the
multiple block is called sector.
Each sector can have 512 bytes of the data.
Cylinder : A set of corresponding tracks in all sides of a hard disk is
called cylinder.
Storage capacity: Its having a formula shown
storage capacity-number of cylinder's tracks per cylinder* sector per
tracks bytes per sector.
7. How a Hard Disk Works
•Composed of several coated platters
stacked on a spindle
•Data saved to the disk : pattern of
magnetized spots
– Spots = 1 – Spaces = 0
•Between platters are
read/write heads that read and
write magnetized data
•Spots are translated into data
9. TYPES OF INTERFACEING IN HDD
They are three types of interfacing in hard disk
.IDE
.SATA
.SCSI
IDE (Integrated Device Electronics) / PATA
Parallel Advanced Technology Attachment)
1. It has a 40 pin connector
2. Data transfer rate is 133mbbs.
3 .when installed this type of hard drives ensure that the
jumpers are correctly configured.
4. If you have two devices connected to one IDE controller.
(one must be set to master and the other must be set o Go
to Settings to activate Windows slave)
10. SCSI(small computer system interface)
1. It has a 50 or 68 pin connector.
2. The data transfer rate is 600Mb/s.
3. These require a SCSI adapter card
connected the system
4. Now a days most desktop
computer did not used the SCSI.
11. Main problem created in HDD
. No operating system
(no operating system in Hard Disk)
Disk boot failure
(cable problem)or (HDD not Detect)