name maximum capacity of each type of secondary storage devices and their manufacturers name.
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Secondary Storage Devices
CD-ROM, DVD, ZIP DISK, JAZ Drive, WORM, Magnetic tapes etc used to store data’s are known as Secondary Memory. Secondary memory can also be called as Backup Memory because they are used to store data and information for future use.
FLOPPY DISK-In 1972, IBM lunched Floppy diskette in market to store data data and program.Floppy is made up with Mylar plastic or Polly vinyl plastic. It has concentric ring (tracks) and redial sectors to store data.Plastic is covered with iron oxide or barium ferrite. When magnetic material is magnetized binary 1 is produced and when it is demagnetized, binary 0 is produced.Its storing capacity is 1.44 MB and rotates with speed of 360 rpm (revolution per minute)Types:SSSD (Single Sided Single Density)SSDD (Single Sided Double Density)DSDD (Double Sided Single Density)DSDD (D0uble Sided Double Density)
CD ROM-The first Compact Disk (CD) was developed by Sony and Philips Corporations to store music in early 1980. The same technology is used to store programs, text, and graphics digitally in optical storage system that is called CD-ROM.CD-ROM stands for Compact Disk Read Only Memory.It is made from polycarbonate and covered with high reflective aluminum.Its diameter is 12 cm, thickness is 1mm and weight is 16 grams.Information is stored in spiral tracks. Spiral tracks have pits and lands to store information.Its storing capacity is 650 MB. It can stores data equivalent to 475 floppies or 24 volume of encyclopedia.Laser beam is used to read data from CD-ROM. Laser beam falls on pit and land, and reflected back to photodiode. The small amount of light is reflected from pit and sufficient light from land. The amount of change in light is converted into electrical signals.
DVDs-In December 1995, nine major electronic companies (Toshiba, Matsushita, Sony, Philips, Time Warner, Pioneer, IVC, Hitachi, and Mitsubishi Electric) agreed to promote a new optical disc technology for distribution of multimedia and feature-length movies called DVD. Its storing capacity is at least 15 times greater than a CD-ROM and it can stores movies of 4 hours duration. The DVD of 4.7 GB, 8.5 GB, 20 GB are available in market. It is also called Super Density Disk (SD). It is available in two formats: (a) Video Format, and (b) DVD-ROM (Read Only Memory) Format. The DVD-Video Format is used for movies and DVD-ROM Format is used to store interactive games, photographs, videos etc.
DVD-ROM: The first DVD format, or a DVD drive that can read, but cannot write to DVD disc.DVD-5: Single layered, single sided DVDs with a capacity of just under 5GB (4.7GB approximately)DVD-9: double layered, single sided DVDs with a capacity of 8.5GB.DVD-10: Single layered, double-sided DVDs with capacity of 9.4 GB.DVD-18: Dual-layered, double sided DVDs with a capacity of about 18GB.
WORM-Write Once, Read ManyHigh capacity storage deviceCannot be erased and rerecord.Used to store backup files.
PENDRIVE-It is a USB (Universal Serial Bus) storage device of 1 GB storing capacity connected to USB port of CPU. When it is compatible with operating system, it works as second hard disk for Operating system.
USE was designed in 1995 to provide high bandwidth data transfer at low cost. USB allows data to travel ten times the speed of the normal parallel port. It is also faster than serial port data transfer. The average parallel port data transfer speed is 1.2MB per second and USB port data transfer speed is 12MB per second. Now a day, many USB based peripherals are lunched in market like as printer, scanner, zip drives, modems, joy sticks, camera, keyboards, and many others.
What is bandwidth?
Bandwidth is directly proportional to the amount of data transmitted or received per unit time. For example, it takes more bandwidth to download a photograph in one second than it takes to download a page of text in one second.
HoPe It WoRkS
CD-ROM, DVD, ZIP DISK, JAZ Drive, WORM, Magnetic tapes etc used to store data’s are known as Secondary Memory. Secondary memory can also be called as Backup Memory because they are used to store data and information for future use.
FLOPPY DISK-In 1972, IBM lunched Floppy diskette in market to store data data and program.Floppy is made up with Mylar plastic or Polly vinyl plastic. It has concentric ring (tracks) and redial sectors to store data.Plastic is covered with iron oxide or barium ferrite. When magnetic material is magnetized binary 1 is produced and when it is demagnetized, binary 0 is produced.Its storing capacity is 1.44 MB and rotates with speed of 360 rpm (revolution per minute)Types:SSSD (Single Sided Single Density)SSDD (Single Sided Double Density)DSDD (Double Sided Single Density)DSDD (D0uble Sided Double Density)
CD ROM-The first Compact Disk (CD) was developed by Sony and Philips Corporations to store music in early 1980. The same technology is used to store programs, text, and graphics digitally in optical storage system that is called CD-ROM.CD-ROM stands for Compact Disk Read Only Memory.It is made from polycarbonate and covered with high reflective aluminum.Its diameter is 12 cm, thickness is 1mm and weight is 16 grams.Information is stored in spiral tracks. Spiral tracks have pits and lands to store information.Its storing capacity is 650 MB. It can stores data equivalent to 475 floppies or 24 volume of encyclopedia.Laser beam is used to read data from CD-ROM. Laser beam falls on pit and land, and reflected back to photodiode. The small amount of light is reflected from pit and sufficient light from land. The amount of change in light is converted into electrical signals.
DVDs-In December 1995, nine major electronic companies (Toshiba, Matsushita, Sony, Philips, Time Warner, Pioneer, IVC, Hitachi, and Mitsubishi Electric) agreed to promote a new optical disc technology for distribution of multimedia and feature-length movies called DVD. Its storing capacity is at least 15 times greater than a CD-ROM and it can stores movies of 4 hours duration. The DVD of 4.7 GB, 8.5 GB, 20 GB are available in market. It is also called Super Density Disk (SD). It is available in two formats: (a) Video Format, and (b) DVD-ROM (Read Only Memory) Format. The DVD-Video Format is used for movies and DVD-ROM Format is used to store interactive games, photographs, videos etc.
DVD-ROM: The first DVD format, or a DVD drive that can read, but cannot write to DVD disc.DVD-5: Single layered, single sided DVDs with a capacity of just under 5GB (4.7GB approximately)DVD-9: double layered, single sided DVDs with a capacity of 8.5GB.DVD-10: Single layered, double-sided DVDs with capacity of 9.4 GB.DVD-18: Dual-layered, double sided DVDs with a capacity of about 18GB.
WORM-Write Once, Read ManyHigh capacity storage deviceCannot be erased and rerecord.Used to store backup files.
PENDRIVE-It is a USB (Universal Serial Bus) storage device of 1 GB storing capacity connected to USB port of CPU. When it is compatible with operating system, it works as second hard disk for Operating system.
USE was designed in 1995 to provide high bandwidth data transfer at low cost. USB allows data to travel ten times the speed of the normal parallel port. It is also faster than serial port data transfer. The average parallel port data transfer speed is 1.2MB per second and USB port data transfer speed is 12MB per second. Now a day, many USB based peripherals are lunched in market like as printer, scanner, zip drives, modems, joy sticks, camera, keyboards, and many others.
What is bandwidth?
Bandwidth is directly proportional to the amount of data transmitted or received per unit time. For example, it takes more bandwidth to download a photograph in one second than it takes to download a page of text in one second.
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ommshaktisamal:
if it works pls mark it as brainliest
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A secondary storage device holds data separately from the processor. The data stays in storage even when power to the computer gets shut off. A hard drive and an optical drive are both secondary storage devices
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