1 / 34

Mass Storage and Files

Mass Storage and Files. By : Mohammad Mahdi Yousefi. Types of Storages . RAM (Random Access Memory) High Speed but not permanent Permanent Mass Storage Devices . RAM Speed is more than permanent storages Information , data and programs Stored temporarily On RAM for processing .

espen
Download Presentation

Mass Storage and Files

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Mass Storageand Files By : Mohammad Mahdi Yousefi

  2. Types of Storages • RAM (Random Access Memory) High Speed but not permanent • Permanent Mass Storage Devices

  3. RAMSpeed is more than permanent storages Information , data and programs Stored temporarily On RAM for processing

  4. Computer Process With in a computer System Process We need space to store , Calculation , input and output data’s

  5. Over the years today the various types of storages are the state of art for permanent storages

  6. Types of Files : Text Data : ACII Files • Common text file extensions include .TXT.RTF.LOG

  7. Types of Files : Data Files • Common data file extensions include DAT, XML, and VCF

  8. Types of Files : Documents Files • Common data file extensions include DOCX, UOF, and ODF

  9. Types of Files : SpreadSheets • Common spreadsheet file extensions include .XLSX, .ODS, and .NUMBERS.

  10. Types of Files : Spreadsheet's • Common spreadsheet file extensions include .XLSX, .ODS, and .NUMBERS.

  11. Types of Files : Web Pages Files • Common Web file extensions include .HTML, .ASP, .PHP, and .CSS.

  12. Types of Files : Source Files • Common system file extensions include .DLL, .DRV, .SYS, and .CAB.

  13. Types of Files : Executable program files • Common executable file extensions include .EXE, .APP, .VB, and .SCR.

  14. Types of Files : Graphic files

  15. Types of Files : Audio Files

  16. Types of Files : Video Files

  17. Disk Types : • Removable (interchangeable) Disk : can be loaded offline and use it anywhere • Permanent or Fixed Disks : like Hard Disk Drives PCs Designed and sold today are configured with a least one type of Hard Disk Drives and removable drives

  18. Magnetic Tape • Magnetic tape data storage uses digital recording on magnetic tape to store digital information. Modern magnetic tape is most commonly packaged in cartridges and cassettes. • Magnetic tapes is inexpensive media with huge space for storage (up to 4 TB) but they are too slow . They are suitable for data backup.

  19. Floppy disk • A floppy disk, or diskette, is a disk storage medium composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic carrier lined with fabric that removes dust particles. They are read and written by a floppy disk drive (FDD).

  20. Floppy Disk • Floppy disks, initially as 8-inch (200 mm) media and later in 5.25-inch (133 mm) and 3.5-inch (90 mm) sizes, were a ubiquitous form of data storage and exchange from the mid-1970s well into the first decade of the 21st century

  21. Internal parts of floppy disk. 1) A hole that indicates a high-capacity disk. 2) The hub that engages with the drive motor. 3) A shutter that protects the surface when removed from the drive. 4) The plastic housing. 5) A polyester sheet reducing friction against the disk media as it rotates within the housing. 6) The magnetic coated plastic disk. 7) A schematic representation of one sector of data on the disk; the tracks and sectors are not visible on actual disks. 8) The write protection tab (unlabeled) is upper left.

  22. Floppy disks are used for emergency boots in aging systems lacking support for other bootable media, and for BIOS updates since most BIOS and firmware programs can still be executed from bootable floppy disks. Industrial automation equipment such as programmable machinery and industrial robots may not have a USB interface; data and programs are then loaded from disks, damageable in industrial environments.

  23. This may not be replaced due to cost or requirement for continuous availability; existing software emulation and virtualization do not solve this problem because no operating system is present or a customized operating system is used that has no drivers for USB devices. For more than two decades, the floppy disk was the primary external writable storage device used. Most computing environments before the 1990s were non-networked and floppy disks were the primary means of transferring data between computers. Unlike hard disks, floppy disks are handled and seen; even a novice user can identify a floppy disk. Because of these factors, a picture of a 3 1⁄2" floppy disk has become an interface metaphor for saving data. The floppy disk symbol is still used by software on user interface elements related to saving files

  24. Magnetic disk • A hard disk drive (HDD) is a data storage device used for storing and retrieving digital information using rapidly rotating discs (platters) coated with magnetic material.

  25. Introduced by IBM in 1956, HDDs became the dominant secondary storage device for general purpose computers by the early 1960s. • Continuously improved, HDDs have maintained this position into the modern era of servers and PCs. • More than 200 companies have produced HDD units, though most current units are manufactured by Seagate, Toshiba and Western Digital. • Worldwide revenues for HDDs shipments are expected to reach $38 billion in 2012, up about 19% from $32 billion in 2011.

  26. The primary characteristics of an HDD are its capacity and performance

  27. An HDD records data by magnetizing a thin film of ferromagnetic material on a disk. Sequential changes in the direction of magnetization represent binary data bits. The data is read from the disk by detecting the transitions in magnetization. User data is encoded using an encoding scheme, such as run-length limited encoding,whichdetermines how the data is represented by the magnetic transitions.

  28. A typical HDD design consists of a spindle that holds flat circular disks, also called platters, which hold the recorded data. The platters are made from a non-magnetic material, usually aluminium alloy, glass, or ceramic, and are coated with a shallow layer of magnetic material typically 10–20 nm in depth, with an outer layer of carbon for protection

  29. Optical Disk • an optical disc (OD) is a flat, usually circular disc which encodes binary data (bits) in the form of pits (binary value of 0 or off, due to lack of reflection when read) and lands (binary value of 1 or on, due to a reflection when read) on a special material (often aluminum) on one of its flat surfaces

  30. The optical disc was invented in 1958. • In 1961 and 1969, David Paul Gregg registered a patent for the analog optical disc for video recording. • This form of optical disc was a very early form of the DVD U.S. Patent 3,430,966. It is of special interest that U.S. Patent 4,893,297, filed 1989, issued 1990, generated royalty income for Pioneer Corporation's DVA until 2007 —then encompassing the CD, DVD, and Blu-ray systems. • In the early 1960s, the Music Corporation of America bought Gregg's patents and his company, Gauss Electrophysics.

  31. Optical Disk • Optical discs are most commonly used for storing music (e.g. for use in a CD player), video (e.g. for use in a Blu-ray player), or data and programs for personal computers (PC). • For computer data backup and physical data transfer, optical discs such as CDs and DVDs are gradually being replaced with faster, smaller, and more reliable solid-state devices, especially the USB flash drive.

  32. TANKS FOR YOUR ATTENTION

More Related