storage devices and its types
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Presentation on storage device
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.
Types of Storage Devices
This document discusses various types of external storage devices, including hard disk drives, solid state drives, flash memory, optical discs, and future technologies. It provides details on how hard disk drives use spinning disks and magnetic heads to read and write data. Solid state drives have no moving parts and use integrated circuits for memory. USB flash drives are small, removable flash memory devices. Optical discs like CDs and DVDs store data in spiral tracks of tiny bumps burned by a laser onto the disc's surface. Future storage technologies may use helium instead of air in hard drives for higher capacity and kinetic drives that interface over ethernet.
STORAGE DEVICES
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.
storage devices
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.
Storage devices and features
this presentation is on storage devices and function. it includes types, properties, functions, and description.
Secondary storage devices
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.
secondary storage devices
Secondary storage devices are non-volatile memory that stores large amounts of data at lower costs than primary memory. There are two main types of secondary storage devices: sequential access devices like magnetic tapes that are very fast for sequential data but slow for random access, and direct access storage devices (DASDs) like hard disks that allow for high-capacity random access storage. Magnetic disks are the most widely used secondary storage, offering high storage capacity, reliability, and the ability to directly access stored data.
Flash Memory Storage
This document discusses and compares different types of flash memory storage devices: solid state drives (SSD), memory cards, and USB flash drives. It provides details on what each type is, their specifications like size and storage capacity, advantages like portability and speed, and disadvantages like cost and durability. SSDs use flash memory and have no moving parts, providing faster access and transfer times than hard disks. Memory cards are used for media transfer between devices and come in formats like SD and microSD. USB flash drives simply plug into ports for convenient portable storage.
Recommended
Presentation on storage device
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.
Types of Storage Devices
This document discusses various types of external storage devices, including hard disk drives, solid state drives, flash memory, optical discs, and future technologies. It provides details on how hard disk drives use spinning disks and magnetic heads to read and write data. Solid state drives have no moving parts and use integrated circuits for memory. USB flash drives are small, removable flash memory devices. Optical discs like CDs and DVDs store data in spiral tracks of tiny bumps burned by a laser onto the disc's surface. Future storage technologies may use helium instead of air in hard drives for higher capacity and kinetic drives that interface over ethernet.
STORAGE DEVICES
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.
storage devices
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.
Storage devices and features
this presentation is on storage devices and function. it includes types, properties, functions, and description.
Secondary storage devices
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.
secondary storage devices
Secondary storage devices are non-volatile memory that stores large amounts of data at lower costs than primary memory. There are two main types of secondary storage devices: sequential access devices like magnetic tapes that are very fast for sequential data but slow for random access, and direct access storage devices (DASDs) like hard disks that allow for high-capacity random access storage. Magnetic disks are the most widely used secondary storage, offering high storage capacity, reliability, and the ability to directly access stored data.
Flash Memory Storage
This document discusses and compares different types of flash memory storage devices: solid state drives (SSD), memory cards, and USB flash drives. It provides details on what each type is, their specifications like size and storage capacity, advantages like portability and speed, and disadvantages like cost and durability. SSDs use flash memory and have no moving parts, providing faster access and transfer times than hard disks. Memory cards are used for media transfer between devices and come in formats like SD and microSD. USB flash drives simply plug into ports for convenient portable storage.
Storage devices
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.
Hard Disk Drive
The document discusses hard disk drives (HDDs), including their history, components, how data is stored and read, sizes, and their replacement by solid state drives (SSDs). It notes that HDDs contain spinning magnetic platters and a head that reads and writes data by aligning magnetic polarities on the platters. HDDs are found inside computers and connect via cable to the motherboard and power supply. They can store operating systems, programs, files and come in various sizes from hundreds of megabytes to terabytes. Some computers can work without an HDD if booted from another device like a flash drive. SSDs are replacing HDDs due to performance advantages but HDDs remain common due to cost.
COMPUTER STORAGE
Computer storage devices hold data permanently even when the computer is turned off. There are two main categories of storage devices: magnetic storage and optical storage. Magnetic storage uses magnetic media like hard drives, floppy disks, and tape to store data through magnetic encoding. Optical storage uses optical discs like CDs, DVDs, and Blu-ray discs to store data through making physical marks readable with laser light. Storage devices have evolved significantly over time to increase capacity and portability.
Flash Memory
Flash memory is a type of non-volatile computer storage that can be electrically erased and reprogrammed. It was invented in 1980 by Dr. Fujio Masuoka and is commonly used in USB drives, memory cards, and solid state drives. The presentation discusses the history of flash memory, its uses, types including mobile device memory, compact flash, and USB drives, as well as new developments and the future of the technology.
Secondary memory
Its a presentation on the secondary memory of the computer devices where the details of the each memory devices are described.
magnetic and optic based storage devices
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.
Storage Devices PPt For class 9
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Storage devices and media
Fixed hard disks are used for storing operating systems and applications on a computer. They have high access speeds and storage capacities but cannot be removed from the computer. Portable hard disks can store large files and transfer them between computers, but can be easily stolen. Magnetic tapes provide extremely large storage capacities for backups but have slow access speeds. Optical disks like CDs and DVDs are used to distribute software, movies and files but have slower data rates than hard disks. Solid state storage like memory sticks are small, robust and portable but have lower capacity and speeds than hard disks. Backups protect against data loss by making copies of files and storing them separately from the originals.
Flash drive
A USB flash drive is a data storage device that contains flash memory with a USB interface. It is smaller, lighter, and more durable than optical discs. A flash drive consists of a printed circuit board with flash memory chips and a USB connector. Flash drives can store large amounts of data and transfer faster than optical drives. While useful for data transfer and storage, flash drives have a limited number of write/erase cycles before failing. Popular brands include Kingston, Transcend, Sandisk, HP, and iBall.
Storage devices(present)
This document discusses various types of storage devices and storage media technologies. It covers magnetic storage devices like hard disks, optical storage like CDs and DVDs, solid state drives, removable storage media like USB flash drives, and various storage capacity units. Key points covered include the components and workings of hard disks, differences between internal and external hard disks, RAID configurations, characteristics of SSDs compared to hard disks, and overview of various memory card formats.
Storage device
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.
Magnetic Tape
Computer Application-Magnetic Tape
Primary Storage Vs. Secondary Storage
Sequential and Direct Access Devices,Storage Organization
Storage Device
This document discusses and compares various types of optical storage media and solid state storage devices. It covers CDs, DVDs, Blu-ray discs, solid state drives, memory sticks, and flash memory cards. For each type it provides key details like storage capacity, advantages like portability, and disadvantages such as being read-only or breakable.
Secondary storage devices
This section of the memory is also referred to as backup storage.
The storage capacity of primary storage is not sufficient to store the large volume so secondary storage.
Secondary storage also know as external memory or auxiliary storage not directly accessible by the CPU.
Storage devices
Storage devices are used to store data and information in a computer. There are two main types: primary and secondary storage. Primary storage includes RAM, ROM, and cache, which can be directly accessed by the CPU. RAM is used as the computer's main memory and comes in DRAM and SRAM varieties. ROM is used to store basic startup instructions and cannot be modified. Cache provides faster access to frequently used data. Secondary storage includes hard disks, which are not directly accessible by the CPU and require transferring data through primary storage. Hard disks are computers' main storage and come in internal and external varieties.
Computer 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.
Secondary storage devices.
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.
Hard Disk
The document provides information about hard disk drives, including:
- Hard disk drives store digitally encoded data on rapidly rotating platters with magnetic surfaces. Data is stored as binary 0s and 1s.
- Disk structures include tracks, sectors, cylinders, and clusters. Tracks are circular areas on disks, sectors are the smallest storage units, cylinders group same tracks, and clusters are groups of sectors.
- Performance is measured by latency, data rate, and seek time. Latency depends on rotation speed, data rate is bytes/second, and seek time is retrieving requested data.
- Common interfaces are IDE, SATA, and SCSI, which have different connectors and data transfer speeds.
Hard disk drive
The document provides information about hard disk drives (HDDs). It discusses that HDDs store data on rapidly rotating disks coated with magnetic material. The first HDD introduced in 1956 was the size of two refrigerators and stored 3.75 MB. Key components of modern HDDs include disks, read/write heads, and electric motors. Common interfaces are EIDE, SATA, and SCSI. HDD performance is impacted by latency and data transfer rates. Popular vendors include Seagate, Western Digital, and Toshiba. Future developments may increase 3.5" desktop drive capacities to 12 TB by 2016.
Secondary Storage Devices
This document discusses secondary storage devices and non-volatile memory. It defines secondary storage devices as any storage beyond the primary storage that enables permanent data storage. Examples of secondary storage devices include magnetic tapes, floppy disks, DVDs, and USB drives. Non-volatile memory is any solid-state memory that can retain data without power, such as ROM, PROM, EPROM, EEPROM, and flash memory. Secondary storage saves data after the primary storage (RAM) saves it, providing permanent storage when power is turned off. Common secondary storage devices include hard drives, optical drives, and USB flash drives.
Enst202 atmospheric moisture
This document discusses concepts related to atmospheric moisture, evaporation, and condensation. It begins by reviewing key prior knowledge, including the second law of thermodynamics and how systems move towards equilibrium. It then explains that evaporation and condensation rates depend on how far a system is from saturation. Water is a polar molecule that forms hydrogen bonds in liquid and solid states. Evaporation occurs when kinetic energy exceeds bond energy. Temperature measures molecular kinetic energy. Saturation vapor pressure represents the maximum water vapor amount for a given temperature. Relative humidity compares actual to saturation vapor pressures. Dew point temperature indicates the temperature at which air becomes saturated. Worked examples apply these concepts to calculate vapor pressures, relative humidity, and dew point.
Storage devices
This presentation gives you about types of storage devices, how it is interfaced and new trends in it.
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Storage devices
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.
Hard Disk Drive
The document discusses hard disk drives (HDDs), including their history, components, how data is stored and read, sizes, and their replacement by solid state drives (SSDs). It notes that HDDs contain spinning magnetic platters and a head that reads and writes data by aligning magnetic polarities on the platters. HDDs are found inside computers and connect via cable to the motherboard and power supply. They can store operating systems, programs, files and come in various sizes from hundreds of megabytes to terabytes. Some computers can work without an HDD if booted from another device like a flash drive. SSDs are replacing HDDs due to performance advantages but HDDs remain common due to cost.
COMPUTER STORAGE
Computer storage devices hold data permanently even when the computer is turned off. There are two main categories of storage devices: magnetic storage and optical storage. Magnetic storage uses magnetic media like hard drives, floppy disks, and tape to store data through magnetic encoding. Optical storage uses optical discs like CDs, DVDs, and Blu-ray discs to store data through making physical marks readable with laser light. Storage devices have evolved significantly over time to increase capacity and portability.
Flash Memory
Flash memory is a type of non-volatile computer storage that can be electrically erased and reprogrammed. It was invented in 1980 by Dr. Fujio Masuoka and is commonly used in USB drives, memory cards, and solid state drives. The presentation discusses the history of flash memory, its uses, types including mobile device memory, compact flash, and USB drives, as well as new developments and the future of the technology.
Secondary memory
Its a presentation on the secondary memory of the computer devices where the details of the each memory devices are described.
magnetic and optic based storage devices
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.
Storage Devices PPt For class 9
Here you can easly get to know about storage devices.
Please like it and follow me.
Don't forget to leave a comment and Share!!!!
Storage devices and media
Fixed hard disks are used for storing operating systems and applications on a computer. They have high access speeds and storage capacities but cannot be removed from the computer. Portable hard disks can store large files and transfer them between computers, but can be easily stolen. Magnetic tapes provide extremely large storage capacities for backups but have slow access speeds. Optical disks like CDs and DVDs are used to distribute software, movies and files but have slower data rates than hard disks. Solid state storage like memory sticks are small, robust and portable but have lower capacity and speeds than hard disks. Backups protect against data loss by making copies of files and storing them separately from the originals.
Flash drive
A USB flash drive is a data storage device that contains flash memory with a USB interface. It is smaller, lighter, and more durable than optical discs. A flash drive consists of a printed circuit board with flash memory chips and a USB connector. Flash drives can store large amounts of data and transfer faster than optical drives. While useful for data transfer and storage, flash drives have a limited number of write/erase cycles before failing. Popular brands include Kingston, Transcend, Sandisk, HP, and iBall.
Storage devices(present)
This document discusses various types of storage devices and storage media technologies. It covers magnetic storage devices like hard disks, optical storage like CDs and DVDs, solid state drives, removable storage media like USB flash drives, and various storage capacity units. Key points covered include the components and workings of hard disks, differences between internal and external hard disks, RAID configurations, characteristics of SSDs compared to hard disks, and overview of various memory card formats.
Storage device
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.
Magnetic Tape
Computer Application-Magnetic Tape
Primary Storage Vs. Secondary Storage
Sequential and Direct Access Devices,Storage Organization
Storage Device
This document discusses and compares various types of optical storage media and solid state storage devices. It covers CDs, DVDs, Blu-ray discs, solid state drives, memory sticks, and flash memory cards. For each type it provides key details like storage capacity, advantages like portability, and disadvantages such as being read-only or breakable.
Secondary storage devices
This section of the memory is also referred to as backup storage.
The storage capacity of primary storage is not sufficient to store the large volume so secondary storage.
Secondary storage also know as external memory or auxiliary storage not directly accessible by the CPU.
Storage devices
Storage devices are used to store data and information in a computer. There are two main types: primary and secondary storage. Primary storage includes RAM, ROM, and cache, which can be directly accessed by the CPU. RAM is used as the computer's main memory and comes in DRAM and SRAM varieties. ROM is used to store basic startup instructions and cannot be modified. Cache provides faster access to frequently used data. Secondary storage includes hard disks, which are not directly accessible by the CPU and require transferring data through primary storage. Hard disks are computers' main storage and come in internal and external varieties.
Computer 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.
Secondary storage devices.
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.
Hard Disk
The document provides information about hard disk drives, including:
- Hard disk drives store digitally encoded data on rapidly rotating platters with magnetic surfaces. Data is stored as binary 0s and 1s.
- Disk structures include tracks, sectors, cylinders, and clusters. Tracks are circular areas on disks, sectors are the smallest storage units, cylinders group same tracks, and clusters are groups of sectors.
- Performance is measured by latency, data rate, and seek time. Latency depends on rotation speed, data rate is bytes/second, and seek time is retrieving requested data.
- Common interfaces are IDE, SATA, and SCSI, which have different connectors and data transfer speeds.
Hard disk drive
The document provides information about hard disk drives (HDDs). It discusses that HDDs store data on rapidly rotating disks coated with magnetic material. The first HDD introduced in 1956 was the size of two refrigerators and stored 3.75 MB. Key components of modern HDDs include disks, read/write heads, and electric motors. Common interfaces are EIDE, SATA, and SCSI. HDD performance is impacted by latency and data transfer rates. Popular vendors include Seagate, Western Digital, and Toshiba. Future developments may increase 3.5" desktop drive capacities to 12 TB by 2016.
Secondary Storage Devices
This document discusses secondary storage devices and non-volatile memory. It defines secondary storage devices as any storage beyond the primary storage that enables permanent data storage. Examples of secondary storage devices include magnetic tapes, floppy disks, DVDs, and USB drives. Non-volatile memory is any solid-state memory that can retain data without power, such as ROM, PROM, EPROM, EEPROM, and flash memory. Secondary storage saves data after the primary storage (RAM) saves it, providing permanent storage when power is turned off. Common secondary storage devices include hard drives, optical drives, and USB flash drives.
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Similar to storage devices and its types
Backing Storage
Magnetic storage devices include floppy disks, hard disk drives, magnetic tape, and solid state drives. Optical storage uses lasers to read and write data in the form of pits and lands on discs like CDs, DVDs, and Blu-ray. Storage capacity and speeds have increased over time while physical sizes have decreased. Cost per gigabyte has also declined for most storage types.
Storage Devices
The document discusses various types of storage devices including optical storage devices like CDs, DVDs, Blu-ray discs, as well as magnetic storage devices like floppy disks, magnetic tapes, zip disks, and solid state flash memory cards. For each type of storage device, the document outlines their key features, advantages, and disadvantages. Overall, the document provides an overview of common storage technologies and compares their characteristics such as storage capacity, speed, portability, and cost.
storage devices
Primary storage refers to memory like RAM and ROM, while secondary storage refers to peripheral devices like disks and tapes used for additional storage. Secondary storage is required for three reasons: data in memory is volatile and can be lost, memory capacity is limited, and memory is more expensive than secondary storage. Common secondary storage devices include floppy disks, hard disks, and optical disks like CDs and DVDs, as well as tape backups. Floppy disks can store 1-100 MB of data but are small and portable. Hard disks can store hundreds of GB but are fixed internally; removable hard disks also exist. Optical disks like CDs and DVDs can store large amounts of data quickly but DVDs store more data and
Storage-computer-fundamentals.pptttttttt
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.
RAM&&ROM.ppt
The document discusses various computer memory and storage devices. It describes RAM and ROM as the main types of memory devices, where RAM is volatile and used for temporary storage, while ROM is non-volatile and can retain data without power. For storage, it outlines magnetic storage devices like hard disks and floppy disks, as well as optical disks like CDs, DVDs, and Blu-ray discs, which allow higher data capacity than magnetic storage. It provides details on the structure and operation of these different memory and storage technologies.
Storage 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.
MEMORY.pptx
The document discusses various computer memory and storage devices. It covers RAM, ROM, magnetic storage like hard disks and floppy disks, and optical storage like CDs, DVDs, and Blu-ray discs. It defines key terms related to these storage technologies like volatile vs non-volatile memory, and size units like megabytes, gigabytes, and terabytes. Characteristics of different storage types are explored such as speed, capacity, cost and portability.
Backing storage
Backing storage refers to permanent storage devices like hard drives and USB flash drives that are used to save files and data when the computer is switched off. Magnetic storage devices like hard disk drives store data using magnetization on metal disks, allowing for high storage capacities. Hard drives are fixed internally while portable external drives also exist. Magnetic tape is used for backups due to low cost and ability to store terabytes of data sequentially. Solid state devices have no moving parts and include USB flash drives and memory cards used in cameras and phones, providing portable storage up to 512GB. Optical storage technologies like CDs, DVDs use lasers to burn pits and lands encoding data, with read-only, write-once, and rewritable
Computers13 Ch6
The document discusses different types of storage media including magnetic tape, optical disks, compact disks, and digital versatile disks. It describes the key characteristics of each type of media such as storage capacity, read/write capabilities, and common uses. The document also covers components needed for multimedia, including optical disk drives, sound cards, speakers, headphones, microphones, graphics cards, and processors.
Secondary storage devices
Secondary storage devices include floppy disks, hard disks, CDs, DVDs, Blu-ray discs, pen drives, and memory cards. These are non-volatile storage options that operate alongside primary storage like RAM. Floppy disks store data on magnetic coated plastic plates divided into tracks and sectors, while hard disks use metal plates for higher capacity. Optical discs like CDs, DVDs, and Blu-rays encode data through laser etching in pits arranged in a tight spiral, allowing greater storage densities over time. Portable options include pen drives with removable flash memory and memory cards commonly used in cameras, phones, and other electronics.
Chapter1 9-07
The document discusses different types of computer memory and storage devices. It describes RAM, ROM, PROM, and EPROM as memory devices, and how they differ in terms of volatility and accessibility. For storage, it outlines magnetic devices like hard disks, floppy disks, and tapes, as well as optical disks like CDs, DVDs, and Blu-ray. It provides details on the storage capacities and characteristics of each type of memory and storage device.
Igcse Ict Presentation Master Slided
Optical backing storage media such as CDs and DVDs can store large files, with CDs holding files smaller than 1Gb such as music and DVDs holding several Gb such as movies. Both CDs and DVDs are portable and can store computer data. CD-ROMs can store data permanently but cannot delete or edit saved data, while CD-RWs and DVD-RWs allow updating of information by recording over old data. Blu-ray discs have the largest storage capacity of optical media. Solid state storage and memory sticks are more robust forms of removable storage that are smaller and more easily transported than optical discs.
Storage Devices
Optical backing storage media such as CDs and DVDs can store large files, with CDs holding files smaller than 1Gb such as music and DVDs holding several Gb such as movies. Both CDs and DVDs are portable and can store computer data. CD-ROMs can store data permanently but cannot delete or edit saved data, while CD-RWs and DVD-RWs allow updating of information by recording over old data. Blu-ray discs have the largest storage capacity of optical media. Solid state storage and memory sticks are more robust forms of removable storage that are smaller and more easily transported than optical discs.
Presentation on computer data storage
Primary memory, also known as main memory or internal memory, is directly accessible to the CPU and holds temporary data during program execution. It includes RAM, ROM, PROM, and EPROM. Secondary memory, also called external memory or auxiliary memory, provides larger storage and retains data when power is removed. Common examples are hard disks, CD-ROMs, magnetic tapes, and flash memory. Secondary memory is organized into files and directories for abstraction and includes additional metadata.
Memory Storage
This document summarizes different types of computer storage devices. It discusses optical storage devices like CDs, DVDs, and Blu-ray discs, noting their capacities and advantages like portability but also disadvantages like fragility. Magnetic storage devices discussed include floppy disks, which are now obsolete, as well as hard disk drives (HDDs) which continue to increase in capacity. HDDs provide large storage at a low cost per MB but can fail physically. Flash memory devices like USB flash drives are also summarized, providing portability but at a higher cost per MB and limited read/write cycles.
Revision2 Storage
RAM is temporary storage that is volatile and clears when power is turned off, while ROM is permanent internal storage used to boot up a computer. Mass storage devices like hard disks and optical disks provide larger but slower storage than internal memory. Hard disks use magnetic disks to allow random access storage, while optical disks like CDs, DVDs, and Blu-ray use lasers to read serially accessed data at different storage capacities. Flash memory, memory cards, magnetic tapes, and floppy disks provide portable but slower storage options than internal memory. Backing up data involves copying it to a separate storage device for protection, while archiving removes old data to free up space.
memory unit
This document discusses computer memory and storage devices. It describes the main types of memory, including RAM, ROM, PROM, and EPROM. It also outlines various storage devices such as magnetic disks, optical disks, hard disks, floppy disks, CDs, DVDs, and Blu-ray discs. The document explains the characteristics, workings, and capacities of these different memory and storage technologies. It also defines basic units of measurement used for computer components like bits, bytes, kilobytes, megabytes and more.
Backing Storage
Backing storage is needed because main memory has limited storage. Backing storage devices include magnetic storage like hard disks, optical storage like CDs and DVDs, and solid state storage like memory cards and solid state drives. Magnetic storage uses magnetic fields to store data on disks or tape. Optical storage uses lasers to read pits and lands on disks. Solid state storage has no moving parts and is used in devices like memory cards, USB flash drives, and solid state drives. Interfaces like SATA, USB, and Thunderbolt allow backing storage devices to connect to computers.
Introduction to Computers Lecture # 10
This document provides an overview of secondary storage devices, including magnetic storage devices like magnetic tapes, hard disks, and floppy disks. It also discusses optical storage devices such as compact discs, digital versatile discs, and Blu-ray discs. Finally, it covers flash drives. The document describes the basic components and features of these various storage technologies and how they work to store digital data.
Optical Storage
Optical storage uses light to read data stored on optical discs or memory cards. Common optical storage devices include CDs, DVDs, Blu-Ray discs, HD DVDs, USB flash drives, memory cards, and smart cards. CDs hold around 800MB of read-only data, while DVDs and Blu-Ray discs can hold significantly more data up to 50GB in writable formats, using laser light of different wavelengths to read small pits in the disc's surface. Flash memory cards and drives store data electronically in non-volatile memory.
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storage devices and its types
- 3. Non-Volatile Faster Simple, Portable, Easy Memory Unlimited Popularity Cheaper than Primary Memory Points to Remember
- 4. Storage Devices Disk types • Floppy disks • Hard disks • Magnetic Tape • Zip disks • Flash drive • Optical disks ( CD-ROM, CD, DVD, RW)
- 5. Magnetic Storage Devices Floppy Disk low capacity only 1.44 Mb Zip as ‘Super floppies’ 100 Mb Read-write Small, light, portable Outdated
- 6. Magnetic Sorage Device Hard Disk Non-Volatile Faster than floppy Higher capacity terms of GB. Non-removable, Removable, most common. R-W drive 1st introduced in IBM PC Coated with magnetic material Expensive one
- 7. Magnetic Storage Device Magnetic tape Ribbon of plastic material Magnetic recording Analogue data RW and Durable Capacity depends upon length and size Not suitable for data files
- 8. Storage Device Optical disks CD-ROM Non-Volatile Digital optical device laser technology, extremely fast Typical capacity of 700 Mb Store any type of data Being replaced Diameter of 120mm Thickness of 1.2mm Low quality playback than DVDs
- 9. Storage Devices Compact Disc-Recordable Write Once Read Many Made of polycarbonate Retains a high level of compatibility Cheaper form Read using Laser light CD-R Optical disk
- 10. Optical Storage Device CD-RW Rewritable optical disc Require a more sensitive laser optics Hardware with RW is required Re-Written up to 10,000 times
- 11. Recordable optical disc Cheaper Records multi-formats Capacity of 4.7GB Non-Volatile data storage Optical Storage Device DVD-R
- 12. Optical Storage Device DVD-RW Rewritable optical disk Typically 4.7GB Hardware capability required Widely used Diameter of 8 cm
- 13. Electronic Storage Device Flash memory Opto-Magnetic storage EEPROM based technology Data transfer Portable, Easy, Simple Higher speed Multiple purpose
Editor's Notes
- I