Data Storage Devices

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Data Storage Devices

  1. 1. Floppy DiskA floppy disk is a disk storage medium composed of a diskof thin and flexible magnetic storage medium, sealed in arectangular plastic carrier lined with fabric that removesdust particles. They are read and written by a floppy diskdrive (FDD).Floppy disks, initially as 8-inch (200 mm) media and laterin 5.25-inch (133 mm) and 3.5-inch (89 mm) sizes, were aubiquitous form of data storage and exchange from the mid-1970s well into the first decade of the 21st century
  2. 2. Zip DiskThe Zip drive is a medium-capacity removable disk storagesystem that was introduced by Iomega in late 1994.Originally, Zip disks launched with capacities of 100MB, but later versions increased this to first 250 MB andthen 750 MB.The format became the most popular of the super-floppytype products which filled a niche in the late 1990s portablestorage market
  3. 3. Tape DriveA tape drive is a data storage device that reads and performs digitalrecording, writes data on a magnetic tape. Magnetic tape data storage istypically used for offline, archival data storage. Tape media generallyhas a favorable unit cost and long archival stability.A tape drive provides sequential access storage, unlike a diskdrive, which provides random access storage. A disk drive can move toany position on the disk in a few milliseconds, but a tape drive mustphysically wind tape between reels to read any one particular piece ofdata. As a result, tape drives have very slow average seek times. Forsequential access once the tape is positioned, however, tape drives canstream data very fast. For example, as of 2010[update] Linear Tape-Open (LTO) supported continuous data transfer rates of up to 140MB/s, comparable to hard disk drives.
  4. 4. Mini CDMini CDs, or “pocketCDs” are CDs with asmaller diameter and onethird the capacity
  5. 5. CD-RW• A CD-RW (Compact Disc-ReWritable) is a rewritable optical disc. It was introduced in 1997, and was known as "CD-Writable" during development. It was preceded by the CD-MO, which was never commercially released.
  6. 6. DVD-RWA DVD-RW disc is a rewritable optical disc with equalstorage capacity to a DVD-R, typically 4.7 GB. The formatwas developed by Pioneer in November 1999 and has beenapproved by the DVD Forum. The smaller Mini DVD-RWholds 1.46 GB, with a diameter of 8 cm
  7. 7. MiniDVD (Mini DVD or miniDVD) is a DVD disc having8 cm in diameter.The 8 cm optical disc format was originally used for musicCD singles, hence the commonly used names CD single andminiCD. Similarly, the manufactured 8 cm DVDs wereoriginally used for music videos and as such became knownas DVD single. Mini DVD
  8. 8. xD-Picture Card is a flash memory card format, usedmainly in older digital cameras. xD stands for ExtremeDigital.[1]xD cards are available in capacities of 16 MiB up to 2 GiB. XD
  9. 9. Flash MemoriesFlash memory is a non-volatile computer storage chip thatcan be electrically erased and reprogrammed. It wasdeveloped from EEPROM (electrically erasableprogrammable read-only memory) and must be erased infairly large blocks before these can be rewritten with newdata. The high density NAND type must also beprogrammed and read in (smaller) blocks, or pages, whilethe NOR type allows a single machine word (byte) to bewritten or read independently.
  10. 10. Secure Digital (SD) es un formato de tarjeta de memoriainventado por Panasonic. Se utiliza en dispositivos portátilestales como cámaras fotográficas digitales, PDA, teléfonosmóviles, computadoras portátiles e incluso videoconsolas (tantode sobremesa como portátiles), entre muchos otros.Estas tarjetas tienen unas dimensiones de 32 mm x 24 mm x 2,1mm. Existen dos tipos: unos que funcionan a velocidadesnormales, y otros de alta velocidad que tienen tasas detransferencia de datos más altas. Algunas cámaras fotográficasdigitales requieren tarjetas de alta velocidad para poder grabarvídeo con fluidez o para capturar múltiples fotografías en unasucesión rápida.SD
  11. 11. A USB flash drive is a data storage device that includes flashmemory with an integrated Universal Serial Bus (USB) interface.USB flash drives are typically removable and rewritable, andphysically much smaller than a floppy disk. Most weigh less than30 g.[1] As of January 2012 drives of 256GB were available,512GB and 1 terabytes (TB) drives were in planning,[2] [3] andstorage capacities as large as 2 terabytes are planned,[4] withsteady improvements in size and price per capacity expected.Some allow up to 100,000 write/erase cycles (depending on theexact type of memory chip used)[5] and 10 years shelf storagetime.[6][7]Memory pen
  12. 12. A memory card or flash card is an electronic flash memorydata storage device used for storing digital information.They are commonly used in many electronicdevices, including digital cameras, mobile phones, laptopcomputers, MP3 players, and video game consoles. Theyare small, re-recordable, and able to retain data withoutpower.Flash Card
  13. 13. SmartMedia is a flash memory card standard owned byToshiba, with capacities ranging from 2 MB to 128 MB.SmartMedia memory cards are no longer manufactured.Smart Media
  14. 14. CompactFlash (CF) is a mass storage device format used inportable electronic devices. Most CompactFlash devicescontain flash memory in a standardized enclosure. Theformat was first specified and produced by SanDisk in1994.[4] The physical format is now used for a variety ofdevicesCompact Flash
  15. 15. The MultiMediaCard (MMC) is a flash memory memorycard standard. Unveiled in 1997 by SanDisk and SiemensAG, it is based on Toshibas NAND-based flash memory,and is therefore much smaller than earlier systems based onIntel NOR-based memory such as CompactFlash. MMC isabout the size of a postage stamp: 24 mm × 32 mm × 1.4mm. MMC originally used a 1-bit serial interface, butnewer versions of the specification allow transfers of 4 or 8bits at a time. It has been more or less superseded by SD(Secure Digital) card, but still sees significant use becauseMMCs can be used in most devices that support SD cards.Multimedia Card

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