Removable media refers to storage media that can be removed from a computer without shutting it down. Common types of removable media include optical discs (CDs, DVDs, Blu-rays), memory cards, floppy disks, and USB flash drives. These allow data to be easily transferred between computers or other devices.
The floppy disk drive was invented in 1967 by Alan Shugart at IBM, originally using 8-inch disks. By the 1980s, improved designs led to the ubiquitous 3.5-inch, 1.44MB floppy disk drive. Floppy disks stored information in concentric tracks and sectors on magnetic media, allowing direct access unlike tapes. Though replaced by optical discs, floppy disks remained useful for software recovery and transferring data without networks.
The document discusses various types of computer storage and memory. It describes primary storage such as RAM and cache memory that is directly accessible by the CPU. Secondary storage like hard drives and SSDs are non-volatile but not directly accessible. Tertiary storage provides very large scale storage through tape libraries and optical jukeboxes. Other storage types discussed include offline storage, network storage, flash memory, magnetic tape, solid state drives, hard drives, optical discs like CDs and Blu-rays, as well as various memory technologies.
The document discusses various storage technologies used in computing. It describes the two primary storage types as magnetic and optical. Magnetic storage includes hard disks, diskettes, magnetic tape, and solid-state drives. Optical storage includes CDs, DVDs, and Blu-ray discs. Other technologies discussed include smart cards, USB flash drives, and RFID tags.
This document provides an overview of removable media, including floppy drives, flash memory, optical media, and external drives. It discusses how data is physically and logically stored on floppy disks, different floppy disk configurations and capacities, and how floppy drives can vary. The document also covers flash memory types like USB thumb drives and memory cards. When discussing optical media, it mentions CD-R, CD-RW, DVD formats, and how CD and DVD drives can interface with the motherboard. The installation process for CD and DVD drives is outlined. Finally, the document discusses troubleshooting removable media issues.
The document provides information about various types of computer storage devices and media. It discusses floppy disks, hard disks, CDs, DVDs, and other storage media. It describes characteristics like capacity, access time, tracks and sectors. It explains how floppy disk drives, hard disk drives, and optical drives work to read and write data to different storage media. The document also differentiates between storage devices, storage media, and discusses care and maintenance of storage.
The document provides an overview of basic disk drives, including floppy disk drives and hard disk drives. It discusses the evolution of floppy disks from 8-inch to 5.25-inch to 3.5-inch. It describes the basic components and workings of floppy disk drives and hard disk drives. It also covers topics like floppy disk formats, maintaining floppy disk drives, and potential problems with floppy disk drives.
This document discusses various types of data storage media and devices. It begins by defining data storage as putting data in a known location that it can later be retrieved from. Main memory (RAM) is used for temporary storage while processing, while backing storage like hard drives is for long-term storage. Storage media physically holds the data, while storage devices read and write to the media. Access speeds and storage capacities vary greatly across devices. Examples discussed include hard drives, optical discs, magnetic tapes, flash memory cards, and solid state drives. The purpose of backups is to create copies of important data to protect against loss from hardware failure or human error.
Removable media refers to storage media that can be removed from a computer without shutting it down. Common types of removable media include optical discs (CDs, DVDs, Blu-rays), memory cards, floppy disks, and USB flash drives. These allow data to be easily transferred between computers or other devices.
The floppy disk drive was invented in 1967 by Alan Shugart at IBM, originally using 8-inch disks. By the 1980s, improved designs led to the ubiquitous 3.5-inch, 1.44MB floppy disk drive. Floppy disks stored information in concentric tracks and sectors on magnetic media, allowing direct access unlike tapes. Though replaced by optical discs, floppy disks remained useful for software recovery and transferring data without networks.
The document discusses various types of computer storage and memory. It describes primary storage such as RAM and cache memory that is directly accessible by the CPU. Secondary storage like hard drives and SSDs are non-volatile but not directly accessible. Tertiary storage provides very large scale storage through tape libraries and optical jukeboxes. Other storage types discussed include offline storage, network storage, flash memory, magnetic tape, solid state drives, hard drives, optical discs like CDs and Blu-rays, as well as various memory technologies.
The document discusses various storage technologies used in computing. It describes the two primary storage types as magnetic and optical. Magnetic storage includes hard disks, diskettes, magnetic tape, and solid-state drives. Optical storage includes CDs, DVDs, and Blu-ray discs. Other technologies discussed include smart cards, USB flash drives, and RFID tags.
This document provides an overview of removable media, including floppy drives, flash memory, optical media, and external drives. It discusses how data is physically and logically stored on floppy disks, different floppy disk configurations and capacities, and how floppy drives can vary. The document also covers flash memory types like USB thumb drives and memory cards. When discussing optical media, it mentions CD-R, CD-RW, DVD formats, and how CD and DVD drives can interface with the motherboard. The installation process for CD and DVD drives is outlined. Finally, the document discusses troubleshooting removable media issues.
The document provides information about various types of computer storage devices and media. It discusses floppy disks, hard disks, CDs, DVDs, and other storage media. It describes characteristics like capacity, access time, tracks and sectors. It explains how floppy disk drives, hard disk drives, and optical drives work to read and write data to different storage media. The document also differentiates between storage devices, storage media, and discusses care and maintenance of storage.
The document provides an overview of basic disk drives, including floppy disk drives and hard disk drives. It discusses the evolution of floppy disks from 8-inch to 5.25-inch to 3.5-inch. It describes the basic components and workings of floppy disk drives and hard disk drives. It also covers topics like floppy disk formats, maintaining floppy disk drives, and potential problems with floppy disk drives.
This document discusses various types of data storage media and devices. It begins by defining data storage as putting data in a known location that it can later be retrieved from. Main memory (RAM) is used for temporary storage while processing, while backing storage like hard drives is for long-term storage. Storage media physically holds the data, while storage devices read and write to the media. Access speeds and storage capacities vary greatly across devices. Examples discussed include hard drives, optical discs, magnetic tapes, flash memory cards, and solid state drives. The purpose of backups is to create copies of important data to protect against loss from hardware failure or human error.
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.
A floppy disk is a magnetic storage medium sealed in a rectangular plastic carrier that is read and written by a floppy disk drive. Floppy disks were commonly used to store files and boot systems when hard drives were less common. They came in 5.25 inch and 3.5 inch sizes, with storage capacities ranging from 100KB to 1.44MB. Floppy disks worked by using read/write heads very close to a magnetic disk coated with particles that could hold data bits.
External devices and peripherals are non-essential components attached to computers to expand their functionality. Input devices like keyboards and mice provide data to computers, while output devices like monitors, printers and speakers share the computer's processed information. Storage devices both internal and external are used to permanently or temporarily save files and data. A history of external storage highlighted early hard drives the size of refrigerators and the introduction of USB technology that enabled smaller portable drives. Common input/output and storage peripherals along with their technologies were also examined.
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
This chapter describes different types of storage devices used in computers. It discusses magnetic storage devices like hard disks and floppy disks, which use magnetism to store data. Optical storage devices like CDs and DVDs are also covered, which use lasers to read and write data. Finally, solid-state storage options like flash memory, smart cards, and solid-state drives are introduced. The document provides details on how each storage type works and its common uses. It also discusses topics like formatting disks, finding data locations, and measuring/improving drive performance.
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.
External storage devices are used to store large amounts of data beyond what can fit in a computer's internal memory. They include hard disks, which store data magnetically on spinning platters; optical disks like CDs and DVDs, which use lasers to read and write data; and flash memory, a solid-state memory that retains data without power. External storage provides additional capacity, allows data to be transported easily, and acts as a backup in case of computer problems like fires or theft.
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 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.
magnetic and optic based storage devicesSarab Singh
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.
The document discusses several secondary storage devices and media, including magnetic tape, floppy disks, hard disks, optical disks, compact disks (CDs), digital versatile/video disks (DVDs), and magneto-optical disks. Magnetic tape is used for storing large amounts of data across its width in frames and blocks. Floppy disks are removable disks that store data sequentially. Hard disks use read/write heads to access data at different locations on the rigid magnetic disk. Optical disks like CDs and DVDs use laser beams to read data encoded as reflective areas under the plastic layer.
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.
The document discusses different types of computer storage systems. It describes hard drives, optical discs like CDs and DVDs, and flash memory storage. Hard drives use magnetic disks and can be internal or external. Optical discs use lasers to read and write data in pits and lands. Flash memory has no moving parts and is used in devices like memory cards and USB drives. Other storage discussed includes remote storage in the cloud, magnetic tape backups, and RAID arrays for large systems. The document provides an overview of common storage characteristics and alternatives for personal computers.
This presentation helps to understand easily storage devices with interactive look with a easy and efficient way. It may reduce the hurdles which are usually comes while we are trying to listen or understand the overall structure of Storage Devices.
Hope it may help you in your Educational and professional life.
Thanks.
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.
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.
Primary storage components like RAM directly interface with the CPU, while secondary storage like RAID and SAN provide additional data storage. RAID arrays use multiple physical hard drives that appear as a single logical drive, allowing for redundancy in case of drive failure. Common RAID types include RAID 0 for disk striping without redundancy, RAID 1 for disk mirroring, and RAID 5 which uses striping with parity for redundancy across drives. Similarly, SAN provides primary storage through a dedicated network of storage devices that can be accessed across an infrastructure.
This document discusses different types of computer storage devices. It describes optical storage devices like CDs, DVDs, and Blu-Ray discs, as well as magnetic storage devices like floppy disks and hard disks. It also mentions solid state storage devices like flash memory and memory sticks. For each type of storage device, it provides details on storage capacity, read/write capabilities, and other characteristics.
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.
The document discusses various types of storage devices and media. It describes the characteristics of magnetic disks like hard disks, including their components, tracks, sectors, cylinders, and head crashes. It also describes optical discs like CDs, DVDs, their read/write processes and various types. Tape storage is also covered. External hard disks, flash drives and other portable storage media are discussed.
Direct access storage devices (DASDs) include magnetic disks, optical storage devices, and flash memory. Magnetic disks can be fixed-head or movable-head. Movable-head disks use a disk pack of stacked platters and read/write heads that move together to access data located in cylinders. Optical storage uses lasers to read microscopic pits on disks like CDs, DVDs, and Blu-ray discs, allowing more data storage than magnetic disks. Flash memory uses transistors to store data in blocks that must be erased before being rewritten.
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.
A floppy disk is a magnetic storage medium sealed in a rectangular plastic carrier that is read and written by a floppy disk drive. Floppy disks were commonly used to store files and boot systems when hard drives were less common. They came in 5.25 inch and 3.5 inch sizes, with storage capacities ranging from 100KB to 1.44MB. Floppy disks worked by using read/write heads very close to a magnetic disk coated with particles that could hold data bits.
External devices and peripherals are non-essential components attached to computers to expand their functionality. Input devices like keyboards and mice provide data to computers, while output devices like monitors, printers and speakers share the computer's processed information. Storage devices both internal and external are used to permanently or temporarily save files and data. A history of external storage highlighted early hard drives the size of refrigerators and the introduction of USB technology that enabled smaller portable drives. Common input/output and storage peripherals along with their technologies were also examined.
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
This chapter describes different types of storage devices used in computers. It discusses magnetic storage devices like hard disks and floppy disks, which use magnetism to store data. Optical storage devices like CDs and DVDs are also covered, which use lasers to read and write data. Finally, solid-state storage options like flash memory, smart cards, and solid-state drives are introduced. The document provides details on how each storage type works and its common uses. It also discusses topics like formatting disks, finding data locations, and measuring/improving drive performance.
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.
External storage devices are used to store large amounts of data beyond what can fit in a computer's internal memory. They include hard disks, which store data magnetically on spinning platters; optical disks like CDs and DVDs, which use lasers to read and write data; and flash memory, a solid-state memory that retains data without power. External storage provides additional capacity, allows data to be transported easily, and acts as a backup in case of computer problems like fires or theft.
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 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.
magnetic and optic based storage devicesSarab Singh
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.
The document discusses several secondary storage devices and media, including magnetic tape, floppy disks, hard disks, optical disks, compact disks (CDs), digital versatile/video disks (DVDs), and magneto-optical disks. Magnetic tape is used for storing large amounts of data across its width in frames and blocks. Floppy disks are removable disks that store data sequentially. Hard disks use read/write heads to access data at different locations on the rigid magnetic disk. Optical disks like CDs and DVDs use laser beams to read data encoded as reflective areas under the plastic layer.
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.
The document discusses different types of computer storage systems. It describes hard drives, optical discs like CDs and DVDs, and flash memory storage. Hard drives use magnetic disks and can be internal or external. Optical discs use lasers to read and write data in pits and lands. Flash memory has no moving parts and is used in devices like memory cards and USB drives. Other storage discussed includes remote storage in the cloud, magnetic tape backups, and RAID arrays for large systems. The document provides an overview of common storage characteristics and alternatives for personal computers.
This presentation helps to understand easily storage devices with interactive look with a easy and efficient way. It may reduce the hurdles which are usually comes while we are trying to listen or understand the overall structure of Storage Devices.
Hope it may help you in your Educational and professional life.
Thanks.
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.
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.
Primary storage components like RAM directly interface with the CPU, while secondary storage like RAID and SAN provide additional data storage. RAID arrays use multiple physical hard drives that appear as a single logical drive, allowing for redundancy in case of drive failure. Common RAID types include RAID 0 for disk striping without redundancy, RAID 1 for disk mirroring, and RAID 5 which uses striping with parity for redundancy across drives. Similarly, SAN provides primary storage through a dedicated network of storage devices that can be accessed across an infrastructure.
This document discusses different types of computer storage devices. It describes optical storage devices like CDs, DVDs, and Blu-Ray discs, as well as magnetic storage devices like floppy disks and hard disks. It also mentions solid state storage devices like flash memory and memory sticks. For each type of storage device, it provides details on storage capacity, read/write capabilities, and other characteristics.
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.
The document discusses various types of storage devices and media. It describes the characteristics of magnetic disks like hard disks, including their components, tracks, sectors, cylinders, and head crashes. It also describes optical discs like CDs, DVDs, their read/write processes and various types. Tape storage is also covered. External hard disks, flash drives and other portable storage media are discussed.
Direct access storage devices (DASDs) include magnetic disks, optical storage devices, and flash memory. Magnetic disks can be fixed-head or movable-head. Movable-head disks use a disk pack of stacked platters and read/write heads that move together to access data located in cylinders. Optical storage uses lasers to read microscopic pits on disks like CDs, DVDs, and Blu-ray discs, allowing more data storage than magnetic disks. Flash memory uses transistors to store data in blocks that must be erased before being rewritten.
This document outlines chapters for an introduction to computers course. It covers topics such as personal computer basics including desktop and portable computers. It also discusses microprocessors and memory such as RAM, ROM, and EEPROM. Additional chapters cover storage devices, input/output devices, and hardware security. The document provides an outline and slides for a lecture on these topics.
The document discusses backing up MongoDB data with MongoDB Management Service (MMS). MMS allows for backing up to the cloud or on-premises. It offers simple, automated backups with point-in-time restore capabilities. The backups are configurable in terms of frequency, retention period, and restore options. MMS supports backing up replica sets and sharded clusters to ensure consistent snapshots of the data.
The document discusses the components inside a CPU. It begins by defining a microprocessor as an electronic component that performs computations and controls functions in a computer. A microprocessor contains transistors, resistors, and diodes on a silicon chip. It works by fetching instructions from memory, decoding what operation to perform, and then executing the operation. The document then discusses different types of processors based on bit size and instruction set. It concludes by describing other components inside the CPU case like the motherboard, heat sink, power supply, and hard drive that work together with the microprocessor.
This document provides information on different types of computer memory, including ROM and RAM. It discusses the main characteristics and uses of ROM types like PROM, EPROM, and EEPROM (including EAROM and flash memory). It also covers the basics of RAM like SDRAM, and specific types like SDR-SDRAM, DDR-SDRAM, and RDRAM. The document is intended to explain the differences between read-only and random access memory.
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 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.
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
This document provides an overview of different storage devices and media. It discusses magnetic storage devices like hard drives, magnetic tapes, and optical media like CDs, DVDs, and Blu-Ray discs. It also covers solid state storage devices like USB flash drives and memory cards. For each type of storage device, it describes their uses, access methods, advantages, and disadvantages. The document aims to explain key concepts around storage to help with revision.
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.
Secondary storage devices are used to store data semi-permanently as primary storage is volatile. Common secondary devices include floppy disks, hard disks, CDs/DVDs, pen drives, and magnetic tapes. Floppy disks use magnetic material coated plastic disks to store data in tracks and sectors, allowing direct access. Hard disks have multiple rigid platters that spin rapidly, containing data on both sides. Data is read and written by heads positioned very close to surfaces. Pen drives use flash memory and a USB interface for portable storage. DVDs can store more data than CDs due to higher density encoding and multilayer capabilities.
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.
The document discusses the differences between computer memory and storage. Memory, such as RAM, is volatile and temporarily stores active data and programs, while storage, like a hard disk, is non-volatile and retains data even when powered off. Various types of primary storage devices including RAM and ROM are described. Secondary storage devices like hard disks, floppy disks, magnetic tapes, CDs, DVDs, and flash memory are also outlined along with their uses, advantages, and applications.
This document discusses different types of computer memory. It describes primary memory, which is directly accessible by the CPU, including RAM and ROM. RAM is volatile and used for active programs and data, while ROM is non-volatile and contains startup instructions. Secondary memory is used for long-term storage and includes floppy disks, hard disks, magnetic tapes, optical disks like CDs and DVDs, and flash memory devices. Cache memory sits between the CPU and main memory for faster access.
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.
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.
This document provides information about different types of computer storage. It discusses primary storage, which includes processor registers, cache, RAM, and ROM. Secondary storage devices that are mentioned include floppy disks, zip disks, hard disks, CDs, DVDs, tapes, and miniature mobile storages like SD cards. Tertiary storage uses robotic mechanisms to mount and dismount removable media. Offline storage refers to data not under the control of the processing unit. Primary storage is volatile and holds data temporarily, while secondary storage is non-volatile and retains data when power is off.
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
This document discusses different types of storage devices, categorizing them as magnetic or optical. Magnetic storage devices include floppy disks, hard disks, and magnetic tape. Optical storage devices include CD-ROM, DVD-ROM, CD-R, and CD-RW. The document explains how data is stored on magnetic disks using polarized particles and on optical disks using pits and lands that reflect light differently. It provides details on formatting disks and the areas created, capacities of different devices, and speeds of CD-ROM and DVD drives.
This document discusses computer memory and storage. It defines primary and secondary memory, and describes their key differences. Primary memory, also called main memory, is volatile and used for processing. It has high access speeds but limited capacity. Secondary memory is non-volatile and used for long-term storage of large volumes of data. Common types of primary memory include RAM, ROM, and cache. Common forms of secondary memory include hard disks, optical disks, magnetic tapes, USB drives, and cloud storage. The document evaluates various storage media and provides details on their characteristics like capacity, access times, and usage.
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.
Secondary storage is required for computers for three reasons: primary storage is volatile, has limited capacity, and is more expensive than secondary storage. Secondary storage includes magnetic media like hard disks and floppy disks, as well as optical media like CDs and DVDs. These devices store large amounts of data permanently but are not directly accessible by the CPU, so they have slower access times than primary storage.
The document discusses various mass storage devices used in computers. It provides details on floppy disks, hard disks, CDs, DVDs, and USB drives. For floppy disks, it describes the parts of the floppy disk and drive, different sizes of floppies, and how data is written to a floppy disk. For hard disks, it explains the components, how data is read and written, low-level formatting, partitioning, and high-level formatting. It also lists characteristics of different hard disk families used in PCs such as capacity, reliability, and transfer rates.
Physiology and chemistry of skin and pigmentation, hairs, scalp, lips and nail, Cleansing cream, Lotions, Face powders, Face packs, Lipsticks, Bath products, soaps and baby product,
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A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
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Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
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at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
Executive Directors Chat Leveraging AI for Diversity, Equity, and InclusionTechSoup
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
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Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
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2. Magnetic drum memory
Invented all the way back in 1932 (in Austria), it was widely used in the
1950s and 60s as the main working memory of computers. In the
mid-1950s, magnetic drum memory had a capacity of around 10 kB.
Above left: The magnetic Drum Memory of the UNIVAC computer.
Above right: A 16-inch-long drum from the IBM 650 computer. It had 40
tracks, 10 kB of storage space, and spun at 12,500 revolutions per minute.
3. The hard disk drive. The first hard disk drive was the IBM Model 350 Disk
File that came with the IBM 305 RAMAC computer in 1956. It had 50 24-inch
discs with a total storage capacity of 5 million characters (just under 5 MB).
Above: IBM Model 350, the first-ever hard disk drive.
4. The first hard drive to have more than 1 GB in capacity was the IBM 3380 in
1980 (it could store 2.52 GB). It was the size of a refrigerator, weighed 550
pounds (250 kg), and the price when it was introduced ranged from $81,000 to
$142,400.
Above left: A 250 MB hard disk drive from 1979. Above right: The IBM 3380
from 1980, the first gigabyte-capacity hard disk drive.
5. The floppy disc
The diskette, or floppy disk (named so because they were flexible), was invented
by IBM and in common use from the mid-1970s to the late 1990s. The first floppy
disks were 8 inches, and later in came 5.25 and 3.5-inch formats. The first floppy
disk, introduced in 1971, had a capacity of 79.7 kB, and was read-only. A read-
write version came a year later.
Above left: An 8-inch floppy and floppy drive next to a regular 3.5-inch floppy
disk. Above right: The convenience of easily removable storage media.
6. Magnetic tape
Magnetic tape was first used for data storage in 1951. The tape device was called
UNISERVO and was the main I/O device on the UNIVAC I computer. The effective
transfer rate for the UNISERVO was about 7,200 characters per second. The tapes
were metal and 1200 feet long (365 meters) and therefore very heavy.
Above left: The row of tape drives for the UNIVAC I computer. Above right:
The IBM 3410 Magnetic Tape Subsystem, introduced in 1971.
7. Section 3 – Storage Devices
• Backing up data
– What is Backing Up?
– Why do we back up?
8. Section 3 – Storage Devices
• (3.1) Backing up data
– What is Backing up data?
• Copying of files and data to a different medium (disk, tape,
flash drive, etc,) in case of a problem with the main storage
device.
• Some backups are often stored in a different place to the
main storage.
– Why do we back up?
• Data could be lost
• Hackers could be responsible for the corruption or even loss
of data
• Backups are also made in case the file need to be used
elsewhere. The original file are then protected against
possible corruption or loss
9. (3.1) Backing up data
What is Backing up data?
• Copying of files and data
to a different medium.
– Can you identify at least
three different types
(disk, tape, flash drive,
etc,) in case of a problem
with the main storage
device.
•Some backups are often stored in a
different place to the main storage.
•Can you identify a number of
different places?
10. Section 3 – Storage Devices
• (3.2) Types of Access
– Serial Access
• With this system, to access the data it is necessary to start at
the beginning and then access each piece of data in turn
until the required information is found.
– Direct Access
• This method is used with magnetic disks and with optical
media. The computer uses a key field to calculate where the
data has been stored.
11. (3.1) Types of Access
Types of Access?
• Serial Access
– With this system, to access the data it is
necessary to start at the beginning and
then access each piece of data in turn
until the required information is found.
•Direct Access
This method is used with magnetic
disks and with optical media. The
computer uses a key field to calculate
where the data has been stored.
12. Section 3 – Storage Devices
• Backing storage media
– Internal or External
• Magnetic
• Optical
• Solid State
• Portable hard disk drives
• Floppy disk drives
• Magnetic tapes
13. How does the Hard Drive work?
• There's just a large shiny, circular
"plate" of magnetic material called a
platter, divided into billions of tiny
areas. Each one of those areas can be
independently magnetized (to store a
1) or demagnetized (to store a 0).
Magnetism is used in computer
storage because it goes on storing
information even when the power is
switched off. If you magnetize a nail, it
stays magnetized until you
demagnetize it. In much the same way,
the computerized information (or data)
stored in your PC hard drive or iPod
stays there even when you switch the
power off.
15. What are the parts in a hard drive?
1. Actuator (compact electric motor that
moves the read-write arm).
2. Read-write arm swings read-write head
back and forth across platter.
3. Central spindle allows platter to rotate
at high speed.
4. Magnetic platter stores information in
binary form.
5. Plug connections link hard drive to
circuit board in personal computer.
6. Read-write head is a tiny magnet on
the end of the read-write arm.
7. Circuit board on underside controls the
flow of data to and from the platter.
8. Flexible connector carries data from
circuit board to read-write head
and platter.
9. Small spindle allows read-write arm to
swing across platter.
16. Hard Drives
Little and large: Here's the 30GB laptop hard-drive (shown in the other photos on
this page) next to a 20GB PCMCIA hard drive from an iPod. The two drives look
strikingly similar and work exactly the same way (both are made by Toshiba), but
the iPod drive is even more of a miracle of miniaturization!
17. Backing Storage Media
• All computer systems have come equipped with some form of
backing storage. When a user type data into a computer, the
information is stored temporarily on the RAM – however, this
information would be lost as soon as the computer was turned off.
Backing storage devices ensure the data is stored permanently and
can be used later.
– Either internal or External and one of three
types
• Magnetic
• Optical
• Solid State
18. Magnetic
• Fixed Hard Disk
• Portable Hard Disk
• Floppy Disk Drive
• Magnetic Tapes
21. Section 3 – Storage Devices
How much space do you think you might
have on the following devices?
• Internal Hard Drive = 20Gb - 1tb
• USB Sticks
– Solid State
• External Hard Drives
– Magnetic
– Solid State
• Floppy disk drives
• Magnetic tapes
22. What types are the following
storage devices?
• Fixed Hard Disk
• Portable Hard Disk
• Floppy disk drives
• Magnetic tapes
• CD-ROM & DVD ROM
• CD-RW & DVD-RW
• DVD RAM
• Blue-ray Disks
• Solid State backing store
• Memory sticks/pen drives
• Flash memory cards
23. Use: Used in home video
consoles?
A. Fixed Hard Disk
B. Portable Hard Disk
C. Floppy disk drives
D. Magnetic tapes
E. CD-ROM & DVD ROM
F. CD-RW & DVD-RW
G. DVD RAM
H. Blue-ray Disks
I. Solid State backing store
J. Memory sticks/pen drives
K. Flash memory cards
24. Use: Used as a security device
– dongle to prevent piracy?
A. Fixed Hard Disk
B. Portable Hard Disk
C. Floppy disk drives
D. Magnetic tapes
E. CD-ROM & DVD ROM
F. CD-RW & DVD-RW
G. DVD RAM
H. Blue-ray Disks
I. Solid State backing store
J. Memory sticks/pen drives
K. Flash memory cards
25. Use: transporting files between
computers or as a back up
A. Fixed Hard Disk
store?
B. Portable Hard Disk
C. Floppy disk drives
D. Magnetic tapes
E. CD-ROM & DVD ROM
F. CD-RW & DVD-RW
G. DVD RAM
H. Blue-ray Disks
I. Solid State backing store
J. Memory sticks/pen drives
K. Flash memory cards
26. Which storage device would you choose
for : using in MP3 players to store music
files?
A. Fixed Hard Disk
B. Portable Hard Disk
C. Floppy disk drives
D. Magnetic tapes
E. CD-ROM & DVD ROM
F. CD-RW & DVD-RW
G. DVD RAM
H. Blue-ray Disks
I. Solid State backing store
J. Memory sticks/pen drives
K. Flash memory cards
27. Which storage device would you choose for:
recording radio & television programs but can be
recorded over again and again?
A. Fixed Hard Disk
B. Portable Hard Disk
C. Floppy disk drives
D. Magnetic tapes
E. CD-ROM & DVD ROM
F. CD-RW & DVD-RW
G. DVD RAM
H. Blue-ray Disks
I. Solid State backing store
J. Memory sticks/pen drives
K. Flash memory cards
28. Which storage device would you choose for :
where manufacturers store music files and
software like computer games?
A. Fixed Hard Disk
B. Portable Hard Disk
C. Floppy disk drives
D. Magnetic tapes
E. CD-ROM & DVD ROM
F. CD-RW & DVD-RW
G. DVD RAM
H. Blue-ray Disks
I. Solid State backing store
J. Memory sticks/pen drives
K. Flash memory cards
29. Which storage device would you
choose for : doing home recordings of
music and films?
A. Fixed Hard Disk
B. Portable Hard Disk
C. Floppy disk drives
D. Magnetic tapes
E. CD-ROM & DVD ROM
F. CD-RW & DVD-RW
G. DVD RAM
H. Blue-ray Disks
I. Solid State backing store
J. Memory sticks/pen drives
K. Flash memory cards
30. Which storage device would you choose for:
batch processing of clearing bank
cheques?
A. Fixed Hard Disk
B. Portable Hard Disk
C. Floppy disk drives
D. Magnetic tapes
E. CD-ROM & DVD ROM
F. CD-RW & DVD-RW
G. DVD RAM
H. Blue-ray Disks
I. Solid State backing store
J. Memory sticks/pen drives
K. Flash memory cards
31. Which storage device would you choose
for : storing the computers operating
system?
A. Fixed Hard Disk
B. Portable Hard Disk
C. Floppy disk drives
D. Magnetic tapes
E. CD-ROM & DVD ROM
F. CD-RW & DVD-RW
G. DVD RAM
H. Blue-ray Disks
I. Solid State backing store
J. Memory sticks/pen drives
K. Flash memory cards