Data storage
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Early data storage was very insufficient, Processing of data was very sequential. Data were stored as flat files (read from beginning to end
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History of storage devices
This document provides a history of data storage devices, beginning with magnetic tape in 1928 and progressing to modern cloud backup solutions. It describes several important innovations in computer storage over time, including magnetic drums, Williams tubes, floppy disks, CDs, DVDs, flash memory cards, and Blu-ray discs. The document shows how storage technologies have evolved from early magnetic and optical formats to today's cloud-based solutions as hardware and internet capabilities continue to advance.
History of storage
This document provides a history of different types of storage devices, including pendrives, CDs/DVDs, floppy disks, memory cards, and all memory card drives. It describes the first generations of pendrives invented by IBM in 1998. It outlines the storage capacities of CDs and details the layers and sizes of DVDs. It also discusses the development of floppy disks by IBM and Shugart Associates in the 1970s and 1980s. The document notes the creation of the micro SD card format by SanDisk in 2005 and its growing storage capacities. Finally, it states that a few years ago the main memory card types were CompactFlash, SmartMedia, and Memory Stick.
CD
Compact discs are optical discs that were originally developed for storing music but later allowed the storage of other digital data. A standard CD has a diameter of 120mm and can hold up to 80 minutes of uncompressed audio or 700MB of data. CDs use a spiral track on their readable surface that is wound tightly enough to diffract light into the full visible spectrum, allowing digital information to be encoded and read with a laser. CDs have become useful for storing various types of data beyond just music.
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Dennis Ritchie (dmr), a pioneer of UNIX who helped develop C programming language, passed away at home after a long illness. He was a quiet but influential figure, making major contributions to computing. His passing is a significant loss.
Cd
The document discusses different audio storage and recording formats:
- A CD stores digital audio data and was developed for sound recordings, similar to DVDs which offer higher storage capacity.
- Cassette tapes store audio recordings magnetically and come as either pre-recorded or blank for recording.
- Mini discs were an obsolete optical disc format for 74 or 80 minutes of audio or 1GB of data.
- Hard disk drives store and retrieve digital data using rapidly rotating discs coated with magnetic material and allow random access to individual data blocks.
Basics of i.t
This document compares and contrasts the characteristics of USB flash drives, optical discs, and cloud computing. USB flash drives are small, portable storage devices that have no moving parts and can hold up to 2 terabytes of data. Optical discs like CDs and DVDs provide cheaper storage but are more vulnerable to damage. Cloud computing offers agility, cost reduction, and device independence but also privacy and legal concerns regarding data location and control.
Hard disk & Optical disk (college group project)
- Hard disk drives (HDDs) are devices used for digital data storage. They consist of rapidly rotating discs coated with magnetic material. Magnetic heads write data to and read data from the disc surfaces.
- HDDs were first introduced in 1956 and have since decreased dramatically in size and cost, becoming standard in personal computers by the late 1980s. Capacities have also increased greatly, with modern HDDs capable of storing terabytes of data.
- Optical discs like CDs and DVDs store data in the form of pits and lands on a reflective surface. They were invented in the late 1950s and early 1960s and are now commonly used to store music, video, and computer programs and data.
Hard disk drive
Hard disk drives (HDDs) are data storage devices that store and retrieve digital information using rapidly rotating disks coated with magnetic material. HDDs have greatly increased in capacity over time, from megabytes to terabytes, while decreasing dramatically in size and cost. Key components include disks, read/write heads, and an actuator arm that moves the heads over the disks. Error correction allows high recording densities without data loss. Future developments may allow even higher capacities through new magnetic recording technologies.
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History of storage devices
This document provides a history of data storage devices, beginning with magnetic tape in 1928 and progressing to modern cloud backup solutions. It describes several important innovations in computer storage over time, including magnetic drums, Williams tubes, floppy disks, CDs, DVDs, flash memory cards, and Blu-ray discs. The document shows how storage technologies have evolved from early magnetic and optical formats to today's cloud-based solutions as hardware and internet capabilities continue to advance.
History of storage
This document provides a history of different types of storage devices, including pendrives, CDs/DVDs, floppy disks, memory cards, and all memory card drives. It describes the first generations of pendrives invented by IBM in 1998. It outlines the storage capacities of CDs and details the layers and sizes of DVDs. It also discusses the development of floppy disks by IBM and Shugart Associates in the 1970s and 1980s. The document notes the creation of the micro SD card format by SanDisk in 2005 and its growing storage capacities. Finally, it states that a few years ago the main memory card types were CompactFlash, SmartMedia, and Memory Stick.
CD
Compact discs are optical discs that were originally developed for storing music but later allowed the storage of other digital data. A standard CD has a diameter of 120mm and can hold up to 80 minutes of uncompressed audio or 700MB of data. CDs use a spiral track on their readable surface that is wound tightly enough to diffract light into the full visible spectrum, allowing digital information to be encoded and read with a laser. CDs have become useful for storing various types of data beyond just music.
UNIX v6で見るdmrの貢献
Dennis Ritchie (dmr), a pioneer of UNIX who helped develop C programming language, passed away at home after a long illness. He was a quiet but influential figure, making major contributions to computing. His passing is a significant loss.
Cd
The document discusses different audio storage and recording formats:
- A CD stores digital audio data and was developed for sound recordings, similar to DVDs which offer higher storage capacity.
- Cassette tapes store audio recordings magnetically and come as either pre-recorded or blank for recording.
- Mini discs were an obsolete optical disc format for 74 or 80 minutes of audio or 1GB of data.
- Hard disk drives store and retrieve digital data using rapidly rotating discs coated with magnetic material and allow random access to individual data blocks.
Basics of i.t
This document compares and contrasts the characteristics of USB flash drives, optical discs, and cloud computing. USB flash drives are small, portable storage devices that have no moving parts and can hold up to 2 terabytes of data. Optical discs like CDs and DVDs provide cheaper storage but are more vulnerable to damage. Cloud computing offers agility, cost reduction, and device independence but also privacy and legal concerns regarding data location and control.
Hard disk & Optical disk (college group project)
- Hard disk drives (HDDs) are devices used for digital data storage. They consist of rapidly rotating discs coated with magnetic material. Magnetic heads write data to and read data from the disc surfaces.
- HDDs were first introduced in 1956 and have since decreased dramatically in size and cost, becoming standard in personal computers by the late 1980s. Capacities have also increased greatly, with modern HDDs capable of storing terabytes of data.
- Optical discs like CDs and DVDs store data in the form of pits and lands on a reflective surface. They were invented in the late 1950s and early 1960s and are now commonly used to store music, video, and computer programs and data.
Hard disk drive
Hard disk drives (HDDs) are data storage devices that store and retrieve digital information using rapidly rotating disks coated with magnetic material. HDDs have greatly increased in capacity over time, from megabytes to terabytes, while decreasing dramatically in size and cost. Key components include disks, read/write heads, and an actuator arm that moves the heads over the disks. Error correction allows high recording densities without data loss. Future developments may allow even higher capacities through new magnetic recording technologies.
Hard disk drive
The document discusses the history and technology of hard disk drives (HDDs). It describes how HDDs store data using rapidly rotating magnetic disks and read/write heads. Key points covered include:
- HDDs were introduced in 1956 and have since increased enormously in capacity while decreasing dramatically in size, weight, and cost.
- HDDs use magnetic recording to store data as magnetic patterns on disks, with read/write heads detecting and modifying magnetism on spinning disks.
- Components include spinning disks, read/write heads on an arm, and motors to spin disks and position heads. Error correction allows higher storage densities.
Data Storages Devices. L.A.Conti
The document discusses various data storage devices including floppy disks, zip disks, MiniDiscs, tape drives, CD-RWs, CD-Rs, DVD-RWs, Mini DVDs, flash memories like Secure Digital cards and Micro SD cards, CompactFlash cards, MultiMediaCards, SmartMedia cards, Mini MMC cards, XD cards, and USB mass storage devices like memory pens. It provides details on the size, storage capacity, introduction date, and other specifications of each type of storage medium.
How hard drive works( report )
This document is a seminar report on hard drives submitted by Saurabh Verma for their Bachelor of Technology degree. The report contains an abstract, introduction on the history and significance of hard drives, and chapters on the components, working, future innovations, advantages and disadvantages of hard drives. The report aims to provide a comprehensive overview of hard drives and their role in data storage.
EXTERNAL MEMORY.pptx
This document summarizes the evolution of external memory storage technologies from floppy disks to modern solutions. It begins with floppy disks in the 1970s-1980s, which were the first portable storage medium but had limited capacity. USB drives emerged in the 1990s-2000s with higher storage capacity and faster transfer speeds. Flash memory technology further improved with solutions like SSDs and microSD cards. Cloud storage gained popularity in the 2010s by allowing online access and storage. Future trends may include quantum computing providing unprecedented storage capabilities.
Hard disk project
View More at Www.funsoln.com
this is best for hard disk presentation, i have done this during my college presentation time
Data storage devices
Floppy disks, CDs, DVDs, tape drives, flash memory, and memory cards are described as common data storage devices. Floppy disks were widely used in the late 20th century but have been largely replaced by methods with greater storage capacities like USB flash drives, external hard drives, and cloud storage. CDs and DVDs introduced rewritable formats like CD-RW and DVD-RW that allowed erasing and rewriting data multiple times compared to write-once formats. Tape drives provide sequential access storage for offline archival, while solid state flash memories like memory cards have faster random access.
G9_WATERFALLS_DWIZY_Q2_PT2.pptx
A memory module is a circuit board that holds random access memory (RAM) and plugs into a computer's memory slots. It allows RAM to be easily added or replaced. Common types include DIMMs, SIMMs, and SO-DIMMs. A memory module contains multiple memory chips and connects via pins along one edge.
Clickhereforfullpaper
Removable storage devices have evolved from floppy disks to include various options with different capacities, speeds, and costs. These include magnetic, optical, and magneto-optical formats. A new fluorescent multi-layer disc technology called FMD promises much higher storage capacities of 20-100 gigabytes on a single disc using 12-30 data layers, faster retrieval speeds up to 1 gigabyte per second, and a more robust format tolerant of various environmental factors during manufacturing and usage.
Storage devices
There are two main types of storage devices: primary and secondary. Primary storage devices, like RAM and cache, are internal and hold data temporarily at high speeds. Secondary storage devices, like hard disk drives, USB drives, CDs, and memory cards, can be internal or external and store data permanently in large capacities. Common examples of primary storage devices are RAM, which temporarily stores frequently used data for high access speeds, and cache memory. Common examples of secondary storage devices are hard disk drives, which store data on spinning magnetic disks; USB drives, also known as flash drives or pen drives, which are portable solid-state memory storage; optical discs like CDs and DVDs, which use lasers to read and write data
Secondary memory
Its a presentation on the secondary memory of the computer devices where the details of the each memory devices are described.
Ex chapter7 questions
This document discusses different types of storage devices and media. It describes the characteristics of internal hard disks, external hard disks, network attached storage devices, and hard disk controllers. It also discusses various types of flash memory storage, cloud storage, optical discs, tape storage, magnetic storage cards, and enterprise storage. The document provides details on the capacities, purposes, and differences between these various storage technologies.
Data storage csc
This document provides an overview of various data storage technologies and devices used in client-server systems, including magnetic disks, tapes, CD-ROMs, WORM disks, optical disks, RAID configurations, network protection devices, power protection devices, and remote system management. It describes the basic workings and purposes of these different components that are crucial for reliable data storage and system uptime in client-server computing environments.
secondarystoragedevices_by_sarthak_goel.pptx
Secondary storage devices store information even when a computer is powered off. Common secondary storage devices include floppy disks, hard disks, magnetic tapes, flash drives, and optical disks. Magnetic tapes and disks are sequential access devices that read/write data in sequence, while hard disks and optical disks are direct access devices that allow random access to data. Secondary storage provides large storage capacity at lower costs than primary storage and is used to store programs and data.
Computer Basics
The document discusses the history of computer generations from the earliest abacus and mechanical computers through five generations of modern electronic computers. It begins with the zeroth generation that used manual methods for calculation. The first generation (1951-1958) used vacuum tubes, magnetic drums, and could store 4000 bits. The second generation (1959-1964) introduced transistors and magnetic cores. The third generation (1965-1974) featured integrated circuits. The fourth generation (1975-1989) used microprocessors and object-oriented languages. The fifth generation (1990-present) focuses on artificial intelligence and natural language processing.
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.
Storage
The document discusses several emerging technologies for computer storage and data storage in the future, including helium-filled hard drives, shingled magnetic recording, DNA storage, holographic disks, heat-assisted magnetic recording, underwater data centers, solid state drives, cloud storage, and improved cassette storage. Many of these technologies promise higher storage capacities and efficiencies compared to current storage methods. For example, DNA storage could store 2.2 petabytes of data per gram and improved cassettes may store up to 100 terabytes of data. These emerging technologies will continue to advance computer storage capabilities in the coming years.
Types of secondary storage devices ppt
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.
Memory
The document discusses computer memory and its types. It explains that memory is required to store data and instructions before, during, and after processing by the CPU. There are two main types of memory: primary and secondary. Primary memory (RAM and ROM) is high-speed volatile memory that is used for temporary storage and processing. Secondary memory (hard disks, optical disks, magnetic tapes, etc.) is non-volatile storage for long-term storage and retrieval of data. The document provides details about different types of primary and secondary storage, their characteristics, uses, and examples.
Welcome
This presentation summarizes various secondary storage devices and their characteristics. It discusses magnetic tapes, magnetic disks, floppy disks, optical disks, memory cards, DVDs, and pen drives. For each device, it describes the structure, advantages, and disadvantages. Magnetic tapes provide high durability but only allow sequential access. Magnetic disks allow random access but are more prone to errors. Floppy disks have limited storage capacity and are difficult to handle. Optical disks have large storage capacity but are non-reusable. Memory cards, DVDs, and pen drives provide portable storage options with increasing capacities over time.
Storage Devices .docx
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semester started in march 2023 and end in july 2023
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Hard disk drive
The document discusses the history and technology of hard disk drives (HDDs). It describes how HDDs store data using rapidly rotating magnetic disks and read/write heads. Key points covered include:
- HDDs were introduced in 1956 and have since increased enormously in capacity while decreasing dramatically in size, weight, and cost.
- HDDs use magnetic recording to store data as magnetic patterns on disks, with read/write heads detecting and modifying magnetism on spinning disks.
- Components include spinning disks, read/write heads on an arm, and motors to spin disks and position heads. Error correction allows higher storage densities.
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The document discusses various data storage devices including floppy disks, zip disks, MiniDiscs, tape drives, CD-RWs, CD-Rs, DVD-RWs, Mini DVDs, flash memories like Secure Digital cards and Micro SD cards, CompactFlash cards, MultiMediaCards, SmartMedia cards, Mini MMC cards, XD cards, and USB mass storage devices like memory pens. It provides details on the size, storage capacity, introduction date, and other specifications of each type of storage medium.
How hard drive works( report )
This document is a seminar report on hard drives submitted by Saurabh Verma for their Bachelor of Technology degree. The report contains an abstract, introduction on the history and significance of hard drives, and chapters on the components, working, future innovations, advantages and disadvantages of hard drives. The report aims to provide a comprehensive overview of hard drives and their role in data storage.
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Hard disk project
View More at Www.funsoln.com
this is best for hard disk presentation, i have done this during my college presentation time
Data storage devices
Floppy disks, CDs, DVDs, tape drives, flash memory, and memory cards are described as common data storage devices. Floppy disks were widely used in the late 20th century but have been largely replaced by methods with greater storage capacities like USB flash drives, external hard drives, and cloud storage. CDs and DVDs introduced rewritable formats like CD-RW and DVD-RW that allowed erasing and rewriting data multiple times compared to write-once formats. Tape drives provide sequential access storage for offline archival, while solid state flash memories like memory cards have faster random access.
G9_WATERFALLS_DWIZY_Q2_PT2.pptx
A memory module is a circuit board that holds random access memory (RAM) and plugs into a computer's memory slots. It allows RAM to be easily added or replaced. Common types include DIMMs, SIMMs, and SO-DIMMs. A memory module contains multiple memory chips and connects via pins along one edge.
Clickhereforfullpaper
Removable storage devices have evolved from floppy disks to include various options with different capacities, speeds, and costs. These include magnetic, optical, and magneto-optical formats. A new fluorescent multi-layer disc technology called FMD promises much higher storage capacities of 20-100 gigabytes on a single disc using 12-30 data layers, faster retrieval speeds up to 1 gigabyte per second, and a more robust format tolerant of various environmental factors during manufacturing and usage.
Storage devices
There are two main types of storage devices: primary and secondary. Primary storage devices, like RAM and cache, are internal and hold data temporarily at high speeds. Secondary storage devices, like hard disk drives, USB drives, CDs, and memory cards, can be internal or external and store data permanently in large capacities. Common examples of primary storage devices are RAM, which temporarily stores frequently used data for high access speeds, and cache memory. Common examples of secondary storage devices are hard disk drives, which store data on spinning magnetic disks; USB drives, also known as flash drives or pen drives, which are portable solid-state memory storage; optical discs like CDs and DVDs, which use lasers to read and write data
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This document discusses different types of storage devices and media. It describes the characteristics of internal hard disks, external hard disks, network attached storage devices, and hard disk controllers. It also discusses various types of flash memory storage, cloud storage, optical discs, tape storage, magnetic storage cards, and enterprise storage. The document provides details on the capacities, purposes, and differences between these various storage technologies.
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This document provides an overview of various data storage technologies and devices used in client-server systems, including magnetic disks, tapes, CD-ROMs, WORM disks, optical disks, RAID configurations, network protection devices, power protection devices, and remote system management. It describes the basic workings and purposes of these different components that are crucial for reliable data storage and system uptime in client-server computing environments.
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Secondary storage devices store information even when a computer is powered off. Common secondary storage devices include floppy disks, hard disks, magnetic tapes, flash drives, and optical disks. Magnetic tapes and disks are sequential access devices that read/write data in sequence, while hard disks and optical disks are direct access devices that allow random access to data. Secondary storage provides large storage capacity at lower costs than primary storage and is used to store programs and data.
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The document discusses the history of computer generations from the earliest abacus and mechanical computers through five generations of modern electronic computers. It begins with the zeroth generation that used manual methods for calculation. The first generation (1951-1958) used vacuum tubes, magnetic drums, and could store 4000 bits. The second generation (1959-1964) introduced transistors and magnetic cores. The third generation (1965-1974) featured integrated circuits. The fourth generation (1975-1989) used microprocessors and object-oriented languages. The fifth generation (1990-present) focuses on artificial intelligence and natural language processing.
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.
Storage
The document discusses several emerging technologies for computer storage and data storage in the future, including helium-filled hard drives, shingled magnetic recording, DNA storage, holographic disks, heat-assisted magnetic recording, underwater data centers, solid state drives, cloud storage, and improved cassette storage. Many of these technologies promise higher storage capacities and efficiencies compared to current storage methods. For example, DNA storage could store 2.2 petabytes of data per gram and improved cassettes may store up to 100 terabytes of data. These emerging technologies will continue to advance computer storage capabilities in the coming years.
Types of secondary storage devices ppt
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.
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The document discusses computer memory and its types. It explains that memory is required to store data and instructions before, during, and after processing by the CPU. There are two main types of memory: primary and secondary. Primary memory (RAM and ROM) is high-speed volatile memory that is used for temporary storage and processing. Secondary memory (hard disks, optical disks, magnetic tapes, etc.) is non-volatile storage for long-term storage and retrieval of data. The document provides details about different types of primary and secondary storage, their characteristics, uses, and examples.
Welcome
This presentation summarizes various secondary storage devices and their characteristics. It discusses magnetic tapes, magnetic disks, floppy disks, optical disks, memory cards, DVDs, and pen drives. For each device, it describes the structure, advantages, and disadvantages. Magnetic tapes provide high durability but only allow sequential access. Magnetic disks allow random access but are more prone to errors. Floppy disks have limited storage capacity and are difficult to handle. Optical disks have large storage capacity but are non-reusable. Memory cards, DVDs, and pen drives provide portable storage options with increasing capacities over time.
Storage Devices .docx
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Data storage
- 2. 1725 - 1975: Punch Cards Early data storage was very inefficient
- 4. 1932 = Disk Drum - 10KB
- 5. 1951 - Magnetic Tape - 7200 characters / second
- 6. 1956 - Hard Disk 5 MB
- 7. 1982 -Solid State Drive - 2MB SSDs are basically Random Access Memory (RAM) emulating Hard Disks and are optimized for storage instead of access time.
- 8. Data Storage in PC’s Primary storage Secondary Storage
- 10. Data Storage In Cloud Cloud computing is believed to have been invented by Joseph Carl Robnett Licklider in the 1960s with his work on ARPANET to connect people and data from anywhere at any time. In 1983, CompuServe offered its consumer users a small amount of disk space that could be used to store any files they chose to upload.
- 13. Conclusion ● It’s difficult to ignore the multitude of benefits received from cloud drives such as flexibility, backup, mobility, connectivity, and scalability ● Technology evolve, and even more exciting, the next generation of cloud computing is just around the bend.