Storage devices can be classified as either removable or non-removable. Common removable storage devices include floppy disks, CDs/DVDs, magnetic tapes, memory sticks, flash memory cards and portable hard disks. Non-removable storage includes fixed hard disks which are used to store large amounts of data like operating systems and software. Primary memory is volatile and secondary memory is non-volatile.
This document discusses different types of storage devices including optical storage devices. It provides a brief history of optical storage including the introduction of CDs in 1983, DVDs in 1996, and Blu-Ray in 2002. It describes how optical storage works by making marks on an optically readable medium that can be read back with a laser, and how data is stored in pits and lands. The document also outlines other storage devices like hard drives, solid state drives, flash memory, and magnetic storage devices.
Storage devices store information to be recalled later and come in three main types: magnetic, optical, and flash memory. Magnetic storage uses disks or tapes and can be internal or external hard drives. Optical storage includes CDs, DVDs, and uses lasers to read and write data on disks. Flash memory cards have no moving parts and provide portable storage. Larger storage capacities are available but come at increased cost versus performance.
This presentation discusses different types of storage devices. It begins by introducing storage capacity and properties of storage units like access time and cost. The main types covered are optical storage devices like CDs, DVDs, and Blu-Ray discs which can store large amounts of data but are fragile. Magnetic storage devices discussed are floppy disks with small capacity and hard disks which are the primary computer storage. Solid state flash memory and memory sticks are also covered as portable options.
Storage devices can be optical, magnetic, or solid state. Optical devices like Blu-ray discs, CDs, and DVDs use lasers to read and write data while magnetic devices such as hard disks, magnetic tape, and floppy disks use magnetism. Solid state devices like external hard drives, SD cards, and USB flash drives store data electronically without moving parts or power source. Common storage devices vary in size, portability, storage capacity, and whether the data can be erased or not.
This document summarizes different types of computer storage devices. It discusses basic units of data storage such as bits, bytes, kilobytes etc. It describes different data access methods for storage devices including random access memory and sequential access memory. The document provides details about various storage devices like magnetic disks, optical disks, solid state drives, USB flash drives and memory cards. It explains technologies like hard disks, floppy disks, zip disks, CDs, DVDs and Blu-ray disks.
Secondary memory is where programs and data are kept on a long-term basis. Common secondary storage devices are the hard disk and optical disks. The hard disk has enormous storage capacity compared to main memory. The hard disk is usually contained inside the case of a computer.
Storage devices come in various types to suit different needs. Internal memory like ROM, RAM, and hard disks are built into computers, while external devices like floppy disks, zip disks, magnetic tapes, CDs/DVDs, and flash drives can transfer and store data. Larger capacity devices like hard disks, DVDs, and flash drives let users store more data than older options like floppy disks, but may be more expensive or fragile. The appropriate storage device depends on needs like data size, portability, and hardware compatibility.
This document discusses different types of storage devices including optical storage devices. It provides a brief history of optical storage including the introduction of CDs in 1983, DVDs in 1996, and Blu-Ray in 2002. It describes how optical storage works by making marks on an optically readable medium that can be read back with a laser, and how data is stored in pits and lands. The document also outlines other storage devices like hard drives, solid state drives, flash memory, and magnetic storage devices.
Storage devices store information to be recalled later and come in three main types: magnetic, optical, and flash memory. Magnetic storage uses disks or tapes and can be internal or external hard drives. Optical storage includes CDs, DVDs, and uses lasers to read and write data on disks. Flash memory cards have no moving parts and provide portable storage. Larger storage capacities are available but come at increased cost versus performance.
This presentation discusses different types of storage devices. It begins by introducing storage capacity and properties of storage units like access time and cost. The main types covered are optical storage devices like CDs, DVDs, and Blu-Ray discs which can store large amounts of data but are fragile. Magnetic storage devices discussed are floppy disks with small capacity and hard disks which are the primary computer storage. Solid state flash memory and memory sticks are also covered as portable options.
Storage devices can be optical, magnetic, or solid state. Optical devices like Blu-ray discs, CDs, and DVDs use lasers to read and write data while magnetic devices such as hard disks, magnetic tape, and floppy disks use magnetism. Solid state devices like external hard drives, SD cards, and USB flash drives store data electronically without moving parts or power source. Common storage devices vary in size, portability, storage capacity, and whether the data can be erased or not.
This document summarizes different types of computer storage devices. It discusses basic units of data storage such as bits, bytes, kilobytes etc. It describes different data access methods for storage devices including random access memory and sequential access memory. The document provides details about various storage devices like magnetic disks, optical disks, solid state drives, USB flash drives and memory cards. It explains technologies like hard disks, floppy disks, zip disks, CDs, DVDs and Blu-ray disks.
Secondary memory is where programs and data are kept on a long-term basis. Common secondary storage devices are the hard disk and optical disks. The hard disk has enormous storage capacity compared to main memory. The hard disk is usually contained inside the case of a computer.
Storage devices come in various types to suit different needs. Internal memory like ROM, RAM, and hard disks are built into computers, while external devices like floppy disks, zip disks, magnetic tapes, CDs/DVDs, and flash drives can transfer and store data. Larger capacity devices like hard disks, DVDs, and flash drives let users store more data than older options like floppy disks, but may be more expensive or fragile. The appropriate storage device depends on needs like data size, portability, and hardware compatibility.
The document discusses different types of secondary storage devices. It describes sequential access devices like magnetic tapes that read and write data sequentially. It also describes direct access devices like hard disks that allow random access to stored data. Hard disks, floppy disks, disk packs, and zip disks are examples of magnetic disks. Optical disks like CDs, DVDs, and Blu-ray disks are also covered. Each type of secondary storage device has advantages and limitations in terms of storage capacity, access speed, portability and reusability.
magnetic and optic based storage devicesSarab Singh
ย
The document describes different types of storage devices used to store data on computers. It discusses magnetic storage devices like hard drives and floppy disks which use magnets to write binary data to an iron oxide coated disk. Optical storage devices like CDs and DVDs use lasers to read and write data by detecting lands and pits on the disk's surface. The document provides details on how each type of device works, common formats and capacities, as well as newer technologies like recordable CDs and DVDs.
There are two types of computer storage: primary and secondary. Primary storage includes RAM and ROM, while secondary storage consists of removable, internal, and external devices like hard drives, floppy disks, CDs, DVDs, and external hard drives. Secondary storage is used to store programs and data even when the computer is powered off, since it retains information without power unlike primary storage.
The document summarizes information about a group project on secondary storage. The group's name is Infinity and it has 6 members. It discusses the definition, advantages, disadvantages and common types of secondary storage, including magnetic tape, magnetic disk, and optical disk. Secondary storage refers to storage that is not directly accessible by the computer but can be accessed by programs. It is slower than primary storage but provides benefits like large storage capacity, low cost, reliability and non-volatility.
The document provides an overview of secondary storage, including its advantages and disadvantages. It discusses the evolution of secondary storage devices and the main types, which include magnetic tape, magnetic disks like hard disks and floppy disks, and optical disks like CDs, DVDs, and their variations. Secondary storage is used to overcome limitations of primary storage and provide virtually unlimited storage capacity to store large volumes of data permanently or for backup purposes.
Memory devices can be categorized as primary storage or secondary storage. Primary storage includes RAM and ROM. RAM is used to temporarily store data and programs being processed by the CPU. ROM permanently stores basic input/output programs like the BIOS. Secondary storage devices store data externally and include USB flash drives, external hard disks, optical disks like CDs/DVDs, memory cards, and online storage services. Common online storage services are DriveHQ, Dropbox, OpenDrive, SpideOak, and ZumoDrive.
We store important documents to access them in the future. Computers store documents and data on storage devices like hard disks, floppy disks, and USB drives. There are two main types of storage: main storage temporarily holds current data (e.g. RAM), while backing storage permanently stores data (e.g. hard disks). Common storage devices include magnetic tapes, hard disks, floppy disks, and compact disks, which differ in terms of capacity, speed, cost, and whether they provide permanent or temporary storage.
My presentation on 'computer hardware component' {hardware}Rahul Kumar
ย
The document lists and describes the main components of a computer hardware system. It includes both internal components like the central processing unit (CPU), motherboard, memory slots, and hard drive as well as external components like the monitor, keyboard, and disk drives. The CPU consists of an arithmetic logic unit, registers, and control unit. The motherboard contains connections for attaching these components and controlling peripheral devices. Memory slots hold SIMM or DIMM memory modules. Hard disks provide fast and large capacity data storage compared to floppy disks.
The document provides information about computers and their components. It defines what a computer is and describes some key parts like the CPU, memory, storage devices, and input/output components. It also discusses the history of computers and important figures like Charles Babbage. Generations of computers are outlined and examples of components like processors, monitors, and printers are explained. Storage capacity units and memory types are also defined.
This document discusses different types of storage devices. It begins by explaining that storage devices are used to store data even when a computer is turned off. It then provides details on various storage media like audio cassettes, video cassettes, VCRs, floppy disks, CDs, DVDs, and USB drives. For CDs and DVDs specifically, it describes their structure, read/write speeds, storage capacities, advantages like portability and large storage, and disadvantages like slow writing speeds. The document emphasizes that storage devices allow easy transfer of data and files between computers.
Bilal Maqbool submitted an assignment on magnetic storage devices to his professor Sir. Shujahat Hussain at the University of Azad Jammu & Kashmir on February 8, 2012. The assignment discussed different types of magnetic storage devices including hard disks, floppy disks, magnetic tape, and magnetic drums. It also covered the basic principles of how magnetic storage works by polarizing iron particles on a disk's surface to represent binary data.
This document discusses various secondary storage devices, including floppy disks, hard disks, CDs, DVDs, USB drives, and Blu-ray discs. It provides details on the history and evolution of floppy disks, describing their decreasing sizes over time from 8 inches to 3.5 inches. Hard disks are described as using rapidly rotating discs coated with magnetic material to store and retrieve data. CDs, DVDs, and Blu-ray discs are all described as optical storage using lasers, with each subsequent technology providing higher storage capacity and data transfer speeds.
There are two main types of storage devices: primary and secondary. Primary storage devices, like RAM and cache, are internal and hold data temporarily at high speeds. Secondary storage devices, like hard disk drives, USB drives, CDs, and memory cards, can be internal or external and store data permanently in large capacities. Common examples of primary storage devices are RAM, which temporarily stores frequently used data for high access speeds, and cache memory. Common examples of secondary storage devices are hard disk drives, which store data on spinning magnetic disks; USB drives, also known as flash drives or pen drives, which are portable solid-state memory storage; optical discs like CDs and DVDs, which use lasers to read and write data
Magnetic tape consists of a thin plastic ribbon coated with magnetic material that can be magnetized to store binary data in sequential tracks and frames, allowing it to serve as a primary means of backup and data transfer between systems in a cost effective manner. Magnetic tape uses tape heads with electromagnetic coils and ferromagnetic cores to magnetize the coating and read the magnetic patterns representing stored data. While magnetic tape provides high storage capacity at low cost and is suitable for batch processing, it also has disadvantages such as slow data transfer rates and inability to randomly access specific data.
Storage provides capacity for files and information through devices like hard disks, while memory provides working space through RAM. Primary storage includes RAM and cache for running the computer, while secondary storage is long-term storage like hard disks. RAM is volatile memory used for running programs, coming in static RAM and dynamic RAM forms. ROM is read-only memory storing basic instructions. Cache memory improves performance by storing frequently used data and instructions. Optical storage includes CDs, DVDs, and Blu-rays, while magnetic storage encompasses floppy disks and hard disks. Flash memory offers portable options like USB drives and solid-state drives.
This document provides an overview of a presentation about pen drives (USB flash drives). It discusses the structure, technology, components, and internal workings of pen drives. Key points include: pen drives use flash memory and a USB interface, their main components are a USB connector, controller chip, flash memory chip, and oscillator, data is stored on and accessed from the flash memory chip, and they provide advantages over other storage methods like floppy disks due to being smaller, faster, more durable, and having larger storage capacities.
A full ppt about computer memory.It will contain all data about computer memory like types of memory,ram and rom, types of ram and rom and cache memory.
The document discusses various storage media including hard drives, floppy disks, tape, Zip disks, CDs, DVDs, Blu-ray discs, USB flash drives, memory cards, and solid state drives. It provides details on the capabilities, uses, advantages and limitations of each type of storage medium. The key points are that storage media are any devices or materials used to store data, and range from internal hard drives to removable options like disks, cards, and drives that allow transferring and sharing data between computers or other devices.
The document discusses various types of storage media including hard drives, floppy disks, tape, Zip disks, CDs, DVDs, Blu-ray discs, USB flash drives, memory cards, solid state drives, and cloud storage. It provides details on the capabilities and uses of each medium. Hard drives can permanently store large amounts of data but are not portable, while removable media like floppy disks, Zip disks, CDs, DVDs, and USB flash drives allow portability but have more limited storage capacity. Newer technologies like solid state drives and cloud storage provide higher speeds and capacity.
The document discusses different types of secondary storage devices. It describes sequential access devices like magnetic tapes that read and write data sequentially. It also describes direct access devices like hard disks that allow random access to stored data. Hard disks, floppy disks, disk packs, and zip disks are examples of magnetic disks. Optical disks like CDs, DVDs, and Blu-ray disks are also covered. Each type of secondary storage device has advantages and limitations in terms of storage capacity, access speed, portability and reusability.
magnetic and optic based storage devicesSarab Singh
ย
The document describes different types of storage devices used to store data on computers. It discusses magnetic storage devices like hard drives and floppy disks which use magnets to write binary data to an iron oxide coated disk. Optical storage devices like CDs and DVDs use lasers to read and write data by detecting lands and pits on the disk's surface. The document provides details on how each type of device works, common formats and capacities, as well as newer technologies like recordable CDs and DVDs.
There are two types of computer storage: primary and secondary. Primary storage includes RAM and ROM, while secondary storage consists of removable, internal, and external devices like hard drives, floppy disks, CDs, DVDs, and external hard drives. Secondary storage is used to store programs and data even when the computer is powered off, since it retains information without power unlike primary storage.
The document summarizes information about a group project on secondary storage. The group's name is Infinity and it has 6 members. It discusses the definition, advantages, disadvantages and common types of secondary storage, including magnetic tape, magnetic disk, and optical disk. Secondary storage refers to storage that is not directly accessible by the computer but can be accessed by programs. It is slower than primary storage but provides benefits like large storage capacity, low cost, reliability and non-volatility.
The document provides an overview of secondary storage, including its advantages and disadvantages. It discusses the evolution of secondary storage devices and the main types, which include magnetic tape, magnetic disks like hard disks and floppy disks, and optical disks like CDs, DVDs, and their variations. Secondary storage is used to overcome limitations of primary storage and provide virtually unlimited storage capacity to store large volumes of data permanently or for backup purposes.
Memory devices can be categorized as primary storage or secondary storage. Primary storage includes RAM and ROM. RAM is used to temporarily store data and programs being processed by the CPU. ROM permanently stores basic input/output programs like the BIOS. Secondary storage devices store data externally and include USB flash drives, external hard disks, optical disks like CDs/DVDs, memory cards, and online storage services. Common online storage services are DriveHQ, Dropbox, OpenDrive, SpideOak, and ZumoDrive.
We store important documents to access them in the future. Computers store documents and data on storage devices like hard disks, floppy disks, and USB drives. There are two main types of storage: main storage temporarily holds current data (e.g. RAM), while backing storage permanently stores data (e.g. hard disks). Common storage devices include magnetic tapes, hard disks, floppy disks, and compact disks, which differ in terms of capacity, speed, cost, and whether they provide permanent or temporary storage.
My presentation on 'computer hardware component' {hardware}Rahul Kumar
ย
The document lists and describes the main components of a computer hardware system. It includes both internal components like the central processing unit (CPU), motherboard, memory slots, and hard drive as well as external components like the monitor, keyboard, and disk drives. The CPU consists of an arithmetic logic unit, registers, and control unit. The motherboard contains connections for attaching these components and controlling peripheral devices. Memory slots hold SIMM or DIMM memory modules. Hard disks provide fast and large capacity data storage compared to floppy disks.
The document provides information about computers and their components. It defines what a computer is and describes some key parts like the CPU, memory, storage devices, and input/output components. It also discusses the history of computers and important figures like Charles Babbage. Generations of computers are outlined and examples of components like processors, monitors, and printers are explained. Storage capacity units and memory types are also defined.
This document discusses different types of storage devices. It begins by explaining that storage devices are used to store data even when a computer is turned off. It then provides details on various storage media like audio cassettes, video cassettes, VCRs, floppy disks, CDs, DVDs, and USB drives. For CDs and DVDs specifically, it describes their structure, read/write speeds, storage capacities, advantages like portability and large storage, and disadvantages like slow writing speeds. The document emphasizes that storage devices allow easy transfer of data and files between computers.
Bilal Maqbool submitted an assignment on magnetic storage devices to his professor Sir. Shujahat Hussain at the University of Azad Jammu & Kashmir on February 8, 2012. The assignment discussed different types of magnetic storage devices including hard disks, floppy disks, magnetic tape, and magnetic drums. It also covered the basic principles of how magnetic storage works by polarizing iron particles on a disk's surface to represent binary data.
This document discusses various secondary storage devices, including floppy disks, hard disks, CDs, DVDs, USB drives, and Blu-ray discs. It provides details on the history and evolution of floppy disks, describing their decreasing sizes over time from 8 inches to 3.5 inches. Hard disks are described as using rapidly rotating discs coated with magnetic material to store and retrieve data. CDs, DVDs, and Blu-ray discs are all described as optical storage using lasers, with each subsequent technology providing higher storage capacity and data transfer speeds.
There are two main types of storage devices: primary and secondary. Primary storage devices, like RAM and cache, are internal and hold data temporarily at high speeds. Secondary storage devices, like hard disk drives, USB drives, CDs, and memory cards, can be internal or external and store data permanently in large capacities. Common examples of primary storage devices are RAM, which temporarily stores frequently used data for high access speeds, and cache memory. Common examples of secondary storage devices are hard disk drives, which store data on spinning magnetic disks; USB drives, also known as flash drives or pen drives, which are portable solid-state memory storage; optical discs like CDs and DVDs, which use lasers to read and write data
Magnetic tape consists of a thin plastic ribbon coated with magnetic material that can be magnetized to store binary data in sequential tracks and frames, allowing it to serve as a primary means of backup and data transfer between systems in a cost effective manner. Magnetic tape uses tape heads with electromagnetic coils and ferromagnetic cores to magnetize the coating and read the magnetic patterns representing stored data. While magnetic tape provides high storage capacity at low cost and is suitable for batch processing, it also has disadvantages such as slow data transfer rates and inability to randomly access specific data.
Storage provides capacity for files and information through devices like hard disks, while memory provides working space through RAM. Primary storage includes RAM and cache for running the computer, while secondary storage is long-term storage like hard disks. RAM is volatile memory used for running programs, coming in static RAM and dynamic RAM forms. ROM is read-only memory storing basic instructions. Cache memory improves performance by storing frequently used data and instructions. Optical storage includes CDs, DVDs, and Blu-rays, while magnetic storage encompasses floppy disks and hard disks. Flash memory offers portable options like USB drives and solid-state drives.
This document provides an overview of a presentation about pen drives (USB flash drives). It discusses the structure, technology, components, and internal workings of pen drives. Key points include: pen drives use flash memory and a USB interface, their main components are a USB connector, controller chip, flash memory chip, and oscillator, data is stored on and accessed from the flash memory chip, and they provide advantages over other storage methods like floppy disks due to being smaller, faster, more durable, and having larger storage capacities.
A full ppt about computer memory.It will contain all data about computer memory like types of memory,ram and rom, types of ram and rom and cache memory.
The document discusses various storage media including hard drives, floppy disks, tape, Zip disks, CDs, DVDs, Blu-ray discs, USB flash drives, memory cards, and solid state drives. It provides details on the capabilities, uses, advantages and limitations of each type of storage medium. The key points are that storage media are any devices or materials used to store data, and range from internal hard drives to removable options like disks, cards, and drives that allow transferring and sharing data between computers or other devices.
The document discusses various types of storage media including hard drives, floppy disks, tape, Zip disks, CDs, DVDs, Blu-ray discs, USB flash drives, memory cards, solid state drives, and cloud storage. It provides details on the capabilities and uses of each medium. Hard drives can permanently store large amounts of data but are not portable, while removable media like floppy disks, Zip disks, CDs, DVDs, and USB flash drives allow portability but have more limited storage capacity. Newer technologies like solid state drives and cloud storage provide higher speeds and capacity.
Secondary storage devices are used to permanently store files and data when the computer is turned off. Common secondary storage devices include hard disk drives, CDs, DVDs, Blu-Ray discs, floppy disks, zip discs, pen drives, memory cards, and magnetic tapes. Hard disk drives are most often used due to their high storage capacities and fast access times, while tape drives can store large amounts of data compactly but have slower access speeds.
The document discusses various secondary storage devices used in computers. It describes hard disk drives, floppy disks, magnetic tapes, CDs, DVDs, flash drives, and flash memory cards. Hard disk drives are the most common secondary storage device and provide fast access to large amounts of stored data. Magnetic tapes can store extremely large amounts of data but provide slow access. Floppy disks, CDs, DVDs, flash drives, and flash memory cards are portable options that allow transferring and storing data in removable formats.
The document discusses various types of secondary storage devices used in computers. It describes the differences between primary and secondary memory, with secondary memory being non-volatile storage like hard disk drives, solid state drives, optical discs, magnetic tapes, floppy disks, flash drives, and flash memory cards. Each secondary storage device is then explained in 1-2 paragraphs covering their storage capacity, speed, portability, applications, advantages and disadvantages.
Optical storage media such as CDs and DVDs are used to store large files like music, videos, and software. CDs hold up to 1GB of data while DVDs can store several GB. Both are portable. CD-ROMs/DVD-ROMs are used to prevent deletion of data by software, music, and publishing companies. CD-Rs/DVD-Rs are for single burn recordings of music, videos, or backups. CD-RWs/DVD-RWs allow updating files. DVD-RAM is housed in a cartridge for video recording and computer memory. Blu-ray has the largest storage capacity of optical media. Solid state storage is small, robust, and expensive removable
The document provides information about secondary storage. It begins by defining secondary storage as non-volatile, long-term storage used to store programs and data when a computer is switched off. The main types of secondary storage are magnetic storage devices like hard disk drives. Advantages of secondary storage include safety, reliability, permanence, and ability to store huge volumes of data cheaply. Disadvantages are slower speed compared to primary storage. Common secondary storage devices discussed include hard disks, optical discs like CDs and DVDs, USB flash drives, memory cards, and smart cards.
This document summarizes different types of computer storage devices. It discusses basic units of data storage such as bits, bytes, kilobytes etc. It describes different data access methods for storage devices including random access memory and sequential access memory. The document provides details about various storage devices like magnetic disks, optical disks, solid state drives, USB flash drives and memory cards. It explains technologies like hard disks, floppy disks, zip disks, CDs, DVDs and Blu-ray disks.
The document discusses various devices used for handling information. It describes how information technology uses computers and software to manage information. It then discusses different communication methods like oral, written, and body language communication. It also discusses different storage devices like floppy disks, hard disks, magnetic tapes, optical disks, solid state drives, USB flash drives, and memory cards. These storage devices are used to store data permanently in computers and are classified as removable or non-removable depending on whether the stored data can be removed or not.
Secondary storage devices are used to store and retrieve data outside of the computer's main memory. They include internal hard drives and removable media like USB drives, CDs, DVDs, and tapes. Secondary storage saves data permanently, allows portability between devices, and comes in various sizes and formats. Common types discussed are fixed internal hard drives using magnetic disks, removable optical disks like CDs and DVDs, magnetic tapes for backups, and floppy disks which were an early portable storage type but have been replaced by higher capacity devices.
Primary storage refers to memory in a computer system like RAM and ROM. Secondary storage is provided by peripheral devices like hard disks, floppy disks, optical disks, and tape drives to store large amounts of data outside of memory. Secondary storage is required for three reasons: 1) memory contents are volatile and lost when power is disconnected, 2) memory capacity is limited, and 3) memory is more expensive than secondary storage. Common secondary storage devices include floppy disks, hard disks, CDs, DVDs, and tape drives used for backups.
Floppy disks, CDs, DVDs, tape drives, flash memory, and memory cards are described as common data storage devices. Floppy disks were widely used in the late 20th century but have been largely replaced by methods with greater storage capacities like USB flash drives, external hard drives, and cloud storage. CDs and DVDs introduced rewritable formats like CD-RW and DVD-RW that allowed erasing and rewriting data multiple times compared to write-once formats. Tape drives provide sequential access storage for offline archival, while solid state flash memories like memory cards have faster random access.
Storage devices are used to permanently store data after it is saved from RAM. The main storage devices discussed are magnetic tape, hard disks, floppy disks, CDs, DVDs, and flash memory. Each device has advantages and disadvantages for storage capacity, speed of access, durability, and portability. Backing up data involves making copies that can be used to restore the original data in case of corruption or hardware failure.
Storage holds data, instructions, and information for future use. Common storage media include floppy disks, CDs, DVDs, tape, and flash drives. Larger storage capacities are measured in kilobytes, megabytes, gigabytes and terabytes. Optical discs like CDs and DVDs use pits and lands to store data as binary digits, while magnetic media like floppy disks and tape use magnetic particles. Flash drives, memory cards, and smart cards provide portable storage. Tape is still used for backup storage due to low cost per gigabyte.
Storage devices such as floppy disks, hard disks, CDs, DVDs, and tape are used to store digital data outside of the computer's main memory. Floppy disks store data on flexible magnetic disks inside a protective case. Hard disks store larger amounts of data than floppy disks on rigid magnetic platters inside a sealed case. CDs and DVDs store large amounts of fixed data and programs on compact discs that can only be read from. Tape is used for backup storage and can store large amounts of data sequentially. Proper ergonomics are important when using computers and mobile devices to prevent injury.
Disk and drives
Disks are round magnetic media that can store data, like floppy disks, hard disks, and external hard drives. Disks are rewritable unless write-protected. Disks can be partitioned into multiple volumes and are sealed in metal or plastic casings.
Drives are devices that can store and read information that is not easily removed, like disks. Common drives include floppy disk drives, hard disk drives, CD-ROM drives, flash memory cards, portable hard drives, and mini flash drives. Drive letters in Windows, like C:, represent the hard disk drive and its partitions by default.
This presentation provides an overview of different storage devices, including their basic units of data storage (bits, bytes, kilobytes, etc.), data access methods (random access vs sequential access), and specific device types. It discusses magnetic disks like hard disks, floppy disks, and zip disks. It also covers optical disks such as CDs, DVDs, and Blu-Ray disks. Finally, it examines flash memory storage options including solid state drives, USB flash drives, memory cards, and more.
This document discusses various computer storage devices. It begins by defining basic units of storage like bits, bytes, kilobytes, megabytes, etc. It then describes different types of primary storage devices like RAM and ROM as well as secondary storage devices like hard disks, CDs, DVDs, flash memory, and magnetic tapes. Specific storage devices are then discussed in more detail including hard disks, optical discs, magnetic disks, disk caches, and various memory cards. The document concludes by covering other older storage technologies like zip disks and super disks.
The Science of Learning: implications for modern teachingDerek Wenmoth
ย
Keynote presentation to the Educational Leaders hui Koฬkiritia Marautanga held in Auckland on 26 June 2024. Provides a high level overview of the history and development of the science of learning, and implications for the design of learning in our modern schools and classrooms.
Information and Communication Technology in EducationMJDuyan
ย
(๐๐๐ ๐๐๐) (๐๐๐ฌ๐ฌ๐จ๐ง 2)-๐๐ซ๐๐ฅ๐ข๐ฆ๐ฌ
๐๐ฑ๐ฉ๐ฅ๐๐ข๐ง ๐ญ๐ก๐ ๐๐๐ ๐ข๐ง ๐๐๐ฎ๐๐๐ญ๐ข๐จ๐ง:
Students will be able to explain the role and impact of Information and Communication Technology (ICT) in education. They will understand how ICT tools, such as computers, the internet, and educational software, enhance learning and teaching processes. By exploring various ICT applications, students will recognize how these technologies facilitate access to information, improve communication, support collaboration, and enable personalized learning experiences.
๐๐ข๐ฌ๐๐ฎ๐ฌ๐ฌ ๐ญ๐ก๐ ๐ซ๐๐ฅ๐ข๐๐๐ฅ๐ ๐ฌ๐จ๐ฎ๐ซ๐๐๐ฌ ๐จ๐ง ๐ญ๐ก๐ ๐ข๐ง๐ญ๐๐ซ๐ง๐๐ญ:
-Students will be able to discuss what constitutes reliable sources on the internet. They will learn to identify key characteristics of trustworthy information, such as credibility, accuracy, and authority. By examining different types of online sources, students will develop skills to evaluate the reliability of websites and content, ensuring they can distinguish between reputable information and misinformation.
How to Download & Install Module From the Odoo App Store in Odoo 17Celine George
ย
Custom modules offer the flexibility to extend Odoo's capabilities, address unique requirements, and optimize workflows to align seamlessly with your organization's processes. By leveraging custom modules, businesses can unlock greater efficiency, productivity, and innovation, empowering them to stay competitive in today's dynamic market landscape. In this tutorial, we'll guide you step by step on how to easily download and install modules from the Odoo App Store.
Post init hook in the odoo 17 ERP ModuleCeline George
ย
In Odoo, hooks are functions that are presented as a string in the __init__ file of a module. They are the functions that can execute before and after the existing code.
2. ๏ Storage Devices are the data storage devices that
are used in the computers to store the data. The
computer has many types of data storage devices.
Some of them can be classified as the removable
data Storage Devices and the others as the non
removable data Storage Devices.
๏ The memory is of two types; one is the primary
memory and the other one is the secondary
memory.
The primary memory is the volatile memory and the
secondary memory is the non volatile memory. The
volatile memory is the kind of the memory that is
erasable and the non volatile memory is the one
where in the contents cannot be erased.
3. ๏ Floppy discs
๏ Fixed hard discs
๏ Portable hard discs
๏ Magnetic tapes
๏ CDs and DVDs
๏ Memory sticks/Pen drives
๏ Flash memory cards
4. ๏ A floppy disk is a data storage medium that is
composed of a disk of thin, flexible floppy )magnetic
storage medium encased in a square or rectangular
plastics hell. Floppy disks are read and written by a
floppy disk drive. A Floppy Disk Drive, or FDD or FD for
short, is a computer disk drive that enables a user to
save data to removable diskettes. Although 8" disk
drives were first made available in 1971, the first real
disk drives used were the 5 1/4" floppy disk drives,
which were later replaced with 3 1/2" floppy disk
drives. Today, because of the limited capacity and
reliability of floppy diskettes many computers no
longer come equipped with floppy disk drives and
are being replaced with CD-R, other writable discs,
and flash drives.
5.
6. ๏ A hard disk drive is the device used to store large
amounts of digital information in computers and
related equipment like iPods and games consoles
such as the Xbox 360 and PS3.
Hard disk drives are used to store operating systems,
software and working data.
These are suitable for any application which requires
very fast access to data for both reading and writing
to. However, Hard disk drives may not be suitable for
applications which need portability.
Almost all computers used a fixed hard disc. Used for
on-line and real time processes requiring direct
access. Used in file servers for computer networks to
store large amount of data
7.
8. ๏ Portable hard discs are good fun because you can carry
data about all over the place and transfer information,
programs, pictures, etc between computers.
๏
๏ A portable hard drive does not require an external power
source
๏ A portable hard drive is great for on-the-go; it is small
enough to carry with you and often designed to be
rugged for transporting
๏ Portable hard drives can be easily used by multiple PCโs
for file sharing
๏ A portable hard drive allows for scheduled automatic
backups of files
๏ A portable drive allows for quick and easy archiving of
data
9. ๏ Magnetic tape has been used for data storage for
over 50 years. When storing large amounts of data,
tape can be substantially less expensive than disk or
other data storage options. Tape storage has always
been used with large computer systems. Modern
usage is primarily as a high capacity medium
for backups and archives.
๏ When storing large amounts of data, tape can be
substantially less expensive than disk or other data
storage options. Tape storage has always been used
with large computer systems. Modern usage is
primarily as a high capacity medium
for backups and archives. As of 2011, the highest
capacity tape cartridges (T10000C) can store 5 TB of
uncompressed data
10.
11. ๏ CDs tend to be used for large files (but smaller than 1Gb) which are too
big for a floppy disc to hold such as music and general animation.
๏ DVDs are used to hold very large files (several Gb) such as movie films.
Both CDs and DVDs are portable i.e. they can be transported from one
computer to another. Both can be used to store computer data.
๏ CD ROM/DVD ROM Applications which require the prevention of
deletion of data, accidental or otherwise. CDs used by software
companies for distributing software programs and data; by Music
companies for distributing music albums and by book publishers for
distributing encyclopedias, reference books etc. DVDs used by film
distributors.
๏ CD R/DVD R Applications which require a single โburningโ of data, e.g.
CDs - recording of music downloads from the Internet, recording of
music from MP3 format, recording of data for archiving or backup
purposes. DVDs โ recording of film movies and television programs.
๏ CD RW/DVD RW Applications which require the updating of information
and ability to record over old data. Not suitable for music recording but
is very useful for keeping generations of files. DVDs have between five
and ten times the capacity of CDs.
12.
13. ๏ USB flash drives are typically removable and
rewritable, much smaller than a floppy disk.
Storage capacities typically range from 64
MB to 64 GB. USB flash drives offer potential
advantages over other portable storage
devices, particularly the floppy disk.
They have a more compact shape,
operate faster, hold much more data, have
a more durable design, and operate more
reliably due to their lack of moving parts.
Flash drives are widely used to transport files
and backup data from computer to
computer.
14.
15. ๏ A memory card or flash memory card is a
solid-state electronic flash memory data
storage device used with digital cameras,
handheld and Mobile computers,
telephones, music players, video game
consoles, and other electronics.
Nowadays, most new PCs have built-in slots
for a variety of memory cards; Memory
Stick, Compact Flash, SD, etc. Some digital
gadgets support more than one memory
card to ensure compatibility.
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