Removable media up

optical disk, memory card, floppy disk

1. HEMANTH RAJ ([email protected])

2. in   computer storage,   removable media  refers to storage media which is designed to be removed from the computer without powering the computer off. Some types of removable media are HEMANTH RAJ ([email protected])

3. Optical discs  ( Blu-ray discs ,  DVDs ,  CDs ) Memory cards  ( CompactFlash card ,  Secure Digital card ,  Memory Stick ) Floppy disks   USB flash drives HEMANTH RAJ ([email protected])

4. 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 In the mid-1990s, the second generation of the optical disc, the DVD manufactured The third generation optical disc was developed in 2000-2006 HEMANTH RAJ ([email protected])

5. introduced as Blu-ray Disk. Developed by the Blu-ray Disc Association (BDA) a group of the world's leading consumer electronics, personal computer and media manufacturers (including Apple, Dell, Hitachi, HP, JVC, LG, Mitsubishi, Panasonic, Pioneer, Philips, Samsung, Sharp, Sony, TDK and Thomson) HEMANTH RAJ ([email protected])

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7. Blu-ray is the name of a next-generation optical disc format developed by the Blu-ray Disc Association (BDA ) The format was developed to enable recording , rewriting and playback of high-definition video (HD), as well as storing large amounts of data. HEMANTH RAJ ([email protected])

8. The format offers more than five times the storage capacity of traditional DVDs and can hold up to 25GB on a single-layer disc and 50GB on a dual-layer disc. the Blu-ray format uses a blue-violet laser instead of red laser to read and write data Blu-ray is currently supported by about 200 of the world's leading consumer electronics, personal computer, recording media, video game and music companies. HEMANTH RAJ ([email protected])

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10. There are three competing DVD Recording standards are… DVD-ROM (read only memory) has data that can only be read and not written DVD-R and  DVD+R  (recordable) can record data only once, and then function as a DVD-ROM DVD+RW , and  DVD-RAM  (random access memory) can all record and erase data multiple times . The storage capacity of DVD is up to 4.37 GB HEMANTH RAJ ([email protected])

11. DVD also known as  Digital Video Disc  or  Digital Versatile Disc DVD is an  optical disc   storage  media format, and was invented and developed by  Philips ,  Sony , Toshiba , and  Time Warner  in 1995 . Its main uses are  video  and  data  storage . DVDs are of the same dimensions as compact discs ( CDs ), but are capable of storing just under seven times as much data HEMANTH RAJ ([email protected])

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13. A  Compact Disc  (also known as a  CD ) is an  optical disc  used to store  digital data . It was originally developed to store sound recordings exclusively. but later it also allowed the preservation of other types of data . Audio CDs have been commercially available since October 1982 . Standard CDs can store 700  MB of data HEMANTH RAJ ([email protected])

14. In 2010, they have been largely replaced by other forms of digital storage. audio CD sales dropping nearly 50% from their peak in 2000 Types of Compact Disc write-once audio and data storage CD-R rewritable media  CD-RW , Video Compact Discs ( VCD ) Super Video Compact Discs ( SVCD ) HEMANTH RAJ ([email protected])

15. A  memory card  or  flash card  is an electronic  flash memory   data storage device  used for storing digital information They are commonly used in many electronic devices, including  digital cameras ,  mobile phones ,  laptop computers ,  MP3 players , and  video game They are small, re-recordable HEMANTH RAJ ([email protected])

16. they can retain data without power . The most common type of memory card in use today is the  SD card which comes in capacities of up to 64  Gigabytes . Major Types of Memory card are… CompactFlash card   Secure Digital card   Memory Stick HEMANTH RAJ ([email protected])

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18. CompactFlash  ( CF ) is a  mass storage device  format used in portable electronic devices . The format was first specified and produced by  SanDisk  in 1994 The physical format is now used for a variety of devices. HEMANTH RAJ ([email protected])

19. CompactFlash became the most successful of the early memory card formats It can store 2  MB  to 128  GB It is used in D igital cameras  and other mass storage devices HEMANTH RAJ ([email protected])

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21. Secure Digital  ( SD ) is a  non-volatile   memory card  format developed by  Panasonic ,  SanDisk , and  Toshiba  for use in portable devices .  It is widely used in  digital cameras ,  digital camcorders ,  handheld computers ,  netbook computers ,  PDAs ,  media players ,  mobile phones ,  GPS  receivers, and  video game consoles . HEMANTH RAJ ([email protected])

22. Standard SD cards have an official maximum capacity of 2  GB , though technically they can store up to 4  GB SDHC (High-capacity) cards have a maximum capacity of 32  GB. SD cards typically have transfer rates in the range of 80–160  Mbit/s HEMANTH RAJ ([email protected])

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24. Memory Stick  is a removable  flash   memory card  format, launched by  Sony  in October 1998 It can store 4   MB  to 32   GB Memory Sticks are used as storage media for a portable device like digital cameras,  digital music players ,  PDAs ,  cellular phones , laptop computers, and the  PlayStation Portable HEMANTH RAJ ([email protected])

25. Memory Sticks include a wide range of actual formats Memory Stick PRO Memory Stick Duo Memory Stick PRO Duo Memory Stick Micro (M2) Memory Stick XC HEMANTH RAJ ([email protected])

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27. floppy disk is Invented by the American information technology company IBM A floppy disk is a data storage medium that is composed of a disk of thin, flexible magnetic storage medium encased in a square or rectangular plastic shell . loppy disks are read and written by a  floppy disk drive  or  FDD floppy disks in 8 inch, 5¼ inch and 3½ inch HEMANTH RAJ ([email protected])

28. Internal parts of a 3 1/2 inch floppy disk.  1 is a hole that indicates a high-capacity disk . 2 is the hub that drives 6, the magentic coated plastic disk . 3 is a shutter that protects the surface when removed from the drive . 4 is the plastic housing.  5 is a polyester sheet that allows the disk media to rotate within the housing . 6 sector of data on the disk 7 is a schematic representation of one sector of data on the disk; the tracks and sectors are not visible. HEMANTH RAJ ([email protected])

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30. Trek Technology  and  IBM  began selling the first USB flash drives commercially in 2000. The   Singaporean   Trek Technology  sold a model under the brand name " ThumbDrive ", and IBM marketed as " DiskOnKey “  USB flash drives are typically removable and rewritable USB flash drive weigh less than 30 g  HEMANTH RAJ ([email protected])

31. Storage capacities in 2010 as large as 256  GB USB drives with USB 2.0 support can store more data and transfer faster than a much larger  optical disc drive Most USB flash drives draw their power from the USB connection, and do not require a battery. HEMANTH RAJ ([email protected])

32. USB connector USB mass storage controller device Test points Flash memory chip Crystal oscillator LED Write-protect  switch (Optional ) Space for second flash memory chip HEMANTH RAJ ([email protected])