Flash drive

Flash drive

USB-flash drive (slang. Flash drive, flash drive, flash drive) - a storage device that uses as a carrier flash memory, and connected to a computer or other reader via USB interface, which came to replace the floppy disks. USB flash drives are usually removable and rewritable, and are physically much smaller than an optical disc.

Most weigh less than 30 grams. USB drives are often used for the same purposes for which floppy or compact discs were once used; that is, for storing, backing up data and transferring computer files. They are smaller, faster, have much larger capacity and are more durable and reliable because they have no moving parts. In addition, they are immune to magnetic fields (as opposed to floppy disks) and are not exposed to surface scratches (unlike CDs)

Description

The main purpose of USB-drives - storage, transfer and exchange of data, backup, loading operating systems (Live USB), etc. The main components of the flash drive:

USB-interface (usually USB 2.0 or 3.0 Standard-A, sometimes micro USB) - provides a physical connection to the computer. The controller is a small microcontroller with built-in ROM and RAM [1].NAND flash memory chip - stores information. Oscillator - generates a clock signal (12 MHz) for the USB bus. Most flash drives use FAT file systems everywhere. Depending on the size of the drive, FAT16, FAT32 or ex FAT are used. For flash drives with a size of 64GB or more, NTFS or ex FAT are used.

Story

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The very first USB flash drives appeared in 2000. They were invented by employees of the Israeli company M-Systems Amir Ban, Dov Moran and Oran Ogdan. In April 1999, a patent for a flash drive was registered in the USA, and in September 2000, the drive itself was submitted. The flash drive was called DiskOnKey, in the USA it was sold together with IBM and carried the logo of an American corporation on board. The first flash drive had 8 MB of memory and cost $ 50; by the end of the year, 16 MB and 32 MB models ($ 100) came out.Одновременносэтимсингапурскаякомпания Trek Technology представиласвоюразработку,повторяющуюпатентот M-Systems. Своёдетище Thumb Drive.Theypresented 8 MB in February 2000 at the CeBIT exhibition in Germany. Trek Technology was able to prove its leadership in Singapore, but lost the lawsuits filed in other countries.

Benefits

Low weight, quiet operation and portability.Versatility: modern computers, televisions, DVDs and media players have USB ports.

Low power consumption (due to the absence of mechanical systems, in contrast to CD, DVD, BD and hard drives)Performance in a wide range of temperatures.

More resistant to mechanical stress (vibration and shock), as well as to the effects of magnetic fields compared to hard drives.Unaffected by scratches and dust that were a problem for optical media and floppy disks.Capable of relatively long-term data storage offline (without requiring power), from units to 10 years. In the worst case (a cheap drive with a lot of wear) data storage is provided for 3-6 months.

Адрес публикации: https://www.prodlenka.org/metodicheskie-razrabotki/326766-flash-drive