A hard disk drive is a data storage device that stores information in the form of magnetic particles on concentric circles called tracks on one or more rigid disks called platters. It consists of platters, read/write heads, and motors that spin the platters and position the heads. Hard drives store operating systems, software, and files and come in various capacities ranging from 10GB to multiple terabytes. Common interface types are IDE, SATA, and SCSI and hard drives can fail due to issues like no operating system, cable problems, or not being detected.
Storage devices
This lesson includes the following sections:
Categorizing Storage Devices
Magnetic Storage Devices
Optical Storage Devices
Storage devices hold data, even when the computer is turned off.
The physical material that actually holds data is called a storage medium. The surface of a floppy disk is a storage medium.
The hardware that writes data to or reads data from a storage medium is called a storage device. A floppy disk drive is a storage device.
The two primary storage technologies are magnetic and optical.
Diskettes (floppy disks)
Hard disks
High-capacity floppy disks
Disk cartridges
Magnetic tape
Compact Disk Read-Only Memory (CD-ROM) A magnetic disk's medium contains iron particles, which can be polarized—given a magnetic charge—in one of two directions.
Each particle's direction represents a 1 (on) or 0 (off), representing each bit of data that the CPU can recognize.
A disk drive uses read/write heads containing electromagnets to create magnetic charges on the medium.
Digital Video Disk Read-Only Memory
(DVD-ROM)
CD-Recordable (CD-R)
CD-Rewritable (CD-RW)
PhotoCD
Esitys Kunnallisjohdon seminaarissa muuttoliikkeestä ja muuttoliikkeen pirullisuudesta tasapainoisen alue- ja väestörakenteen näkökulmasta. Esityksessä runsaasti kuntakarttoja ja TOP 20 -taulukoita muuttoliikkeen määrään ja rakenteeseen liittyvistä muuttujista. Lisäksi lyhyt yhteenveto tulevasta analyysistä 'Suomen vetovoimaisimmista kunnista 2010-luvulla'.
Storage devices
This lesson includes the following sections:
Categorizing Storage Devices
Magnetic Storage Devices
Optical Storage Devices
Storage devices hold data, even when the computer is turned off.
The physical material that actually holds data is called a storage medium. The surface of a floppy disk is a storage medium.
The hardware that writes data to or reads data from a storage medium is called a storage device. A floppy disk drive is a storage device.
The two primary storage technologies are magnetic and optical.
Diskettes (floppy disks)
Hard disks
High-capacity floppy disks
Disk cartridges
Magnetic tape
Compact Disk Read-Only Memory (CD-ROM) A magnetic disk's medium contains iron particles, which can be polarized—given a magnetic charge—in one of two directions.
Each particle's direction represents a 1 (on) or 0 (off), representing each bit of data that the CPU can recognize.
A disk drive uses read/write heads containing electromagnets to create magnetic charges on the medium.
Digital Video Disk Read-Only Memory
(DVD-ROM)
CD-Recordable (CD-R)
CD-Rewritable (CD-RW)
PhotoCD
Esitys Kunnallisjohdon seminaarissa muuttoliikkeestä ja muuttoliikkeen pirullisuudesta tasapainoisen alue- ja väestörakenteen näkökulmasta. Esityksessä runsaasti kuntakarttoja ja TOP 20 -taulukoita muuttoliikkeen määrään ja rakenteeseen liittyvistä muuttujista. Lisäksi lyhyt yhteenveto tulevasta analyysistä 'Suomen vetovoimaisimmista kunnista 2010-luvulla'.
This is the profile of Participants fo PGPEx batch. The average experience of the batch is 5 years. And we have a diverse batch profile. If you are interested in any particular candidate or if you are interested in campus placements. Kindly contact us at the mail ID stated in Brochure. If any clarifications kindly post in comments.
Government contracts attorney Steven Koprince's presentation from the 2012 National HUBZone Conference entitled "Best Practices for Ongoing HUBZone Compliance."
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
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
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.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
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.
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
2. HARD DISK DRIVEHARD DISK DRIVE
• It is a data storage device in a computer.It is a data storage device in a computer.
• It is a secondary storage device.It is a secondary storage device.
• Its stored in 0 (or) 1.Its stored in 0 (or) 1.
• The operating system, software and mostThe operating system, software and most
other files are stored in the HDD.other files are stored in the HDD.
• Its invented in 1954 by ibm.Its invented in 1954 by ibm.
• Nowaday,HDD with3.5 inch or 5.25 inchNowaday,HDD with3.5 inch or 5.25 inch
platters in different capacities, such asplatters in different capacities, such as
10GB,20GB,40GB,80GB etc.10GB,20GB,40GB,80GB etc.
3.
4. Main components for Hard disk drive
• Disk platter
• Stepper motor
• Spindle motor
• Read and write head
• Arm
5. DISK PLATTER
1. The platter is made up of a magnetic material, in the flat disk
part of the drive.
2. The data stored in the platter.
3. Each set of magnetic particles is collection a unit called a bit.
4. 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.
SPINDLE 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.
6. 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 ARMHEAD ARM
1. Used for read and write operations.
Disk structures
(A) Track
(B sector
(C) Cylinder
(D) Storage capacity
7. 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 fourmula shown
below:
storage capacity=number of cylinder’s*tracks per
cylinder*
sector per tracks*bytes per sector.
8. Jumper setting for
• It have 8 Pins
2 Rows
4 pairs
Pins
Rows
pairs
Master
Slave
Cable select
No use
9. Partition for HDD
1.Primary Partition:
•Windows operating systems must be located in a primary
partition.
• Only primary partitions can be used to boot the
operatingsystem.
2.Extended Partition:
•A hard disk may contain only one extended partition.
•the extended partition can be subdivided into multiple logical
partitions (Other than OS is a Extended Partition).
3.Logical Partition:
•Linux operating systems can be installed into (and run from)
logical partitions.
4.Active Partition:
•Only one partition on a computer can be set as an active
partition or bootable partition.
•For example, if you are using Microsoft Windows the partition
that contains Windows is the active partition.
10. File system in HDD
1.FAT (File Allocation Table)
2.NTFS (New Technology File System
FAT NTFS
Its not a security Its a security
Partition size is max 32GB Partition size is 1 (Tera Bytes)
Does not support data
compersion
It support data compersion
Does not support disk quota Its support disk quota
Window os conformability
(95,98.ms-dos)
Window os conformability
( 2000,xp ,vista,win 7 )
11. 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 to
slave).
13. SATA (Serial Advanced Technology
Attachment)
1.It has a 7pin connector.
2.It is the latest high-speed type of hard drive connectors.
3.Data transfer rate is 300Mb/s. As there are faster than old
IDE interface.
4. the latest hard drives are using this type of interface.
5. As there are faster than old IDE interface.
SATA socket, power connector and data
cable
If the motherboard have
the SATA connectors/sockets
as shown the picture.
15. 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 into
the system.
4.Nowadays, most desktop computers did not use the
SCSI.
16. Main Problem Created in HDD
•No Operating System
(No operating system in Hard Disk)
•Disk boot Failure
(Cable Problem) OR (HDD Not Detect)
17. HDD Capacity and Size Information
When pure chasing a hard disk drive, the term megabytes,
gigabytes or terabytes may be confusing terms. The following
table gives you an example of each of these terms and how they
compare to other sizes.
TermTerm Equal toEqual to
BitBit 0 or 10 or 1
Kb(Kilobit)Kb(Kilobit) 1,024 bits1,024 bits
ByteByte
8 bits (approximately one character in a Word8 bits (approximately one character in a Word
document)document)
KB(Kilobyte)KB(Kilobyte) 1,024 bytes1,024 bytes
MB(Megabyte)MB(Megabyte) 1,024 Kilobytes or 1,048,576 Bytes1,024 Kilobytes or 1,048,576 Bytes
GB(Gigabyte)GB(Gigabyte) 1,024 Megabytes or 1,073,741, 824 Bytes1,024 Megabytes or 1,073,741, 824 Bytes
18. TB(Terabyte) 1,024 Gigabytes or 1,099,511,627,776 Bytes
PB(Petabyte) 1,024 Terabytes or about 1,000,000,000,000,000 Bytes
EB(Exabyte)
1,024 Petabytes or about 1,000,000,000,000,000,000
Bytes
ZB(Zetabyte)
1,024 Exabytes or about
1,000,000,000,000,000,000,000 Bytes
YB(Yottabyte)
1,024 Zetabytes or about
1,000,000,000,000,000,000,000,000 Bytes
Note: Example: 1 GB = 1,024 MB but for easy calculations,
normally we just say 1 GB = 1,000 MB by ignoring 24 MB size.
Also, 1 MB = 1,000 KB, etc.