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
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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
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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)
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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.
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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.
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10. • There are three competing DVD Recording
standards are…
1. DVD-ROM (read only memory) has data that can only
be read and not written
2. DVD-Rand DVD+R (recordable) can record data only
once, and then function as a DVD-ROM
3. 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
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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
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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
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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
1. write-once audio and data storage CD-R
2. rewritable media CD-RW,
3. Video Compact Discs (VCD)
4. Super Video Compact Discs (SVCD)
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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
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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…
1. CompactFlash card
2. Secure Digital card
3. Memory Stick
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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.
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19. • CompactFlash became the most successful of
the early memory card formats
• It can store 2 MB to 128 GB
• It is used in Digital cameras and other mass
storage devices
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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.
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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
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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
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25. • Memory Sticks include a wide range of actual
formats
1. Memory Stick PRO
2. Memory Stick Duo
3. Memory Stick PRO Duo
4. Memory Stick Micro (M2)
5. Memory Stick XC
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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
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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.
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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
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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.
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32. 1. USB connector
2. USB mass storage
controller device
3. Test points
4. Flash memory chip
5. Crystal oscillator
6. LED
7. Write-protect switch
(Optional)
8. Space for second
flash memory chipHEMANTH RAJ (hmnthrj@gmail.com)