1). Repairing a damaged CD By : Edgar Lee
Why compact discs get damaged. Compact discs are all plastic. Compact discs are even not sensitive to magnetic fields as in case floppy disks, which never used to retain data when even a slight magnetic field is crossed with floppies. Then what is the reason why CDs get corrupted?
CDs work on the principle of reflection of light. CD drives have a built in laser that is used to read data.
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2). USB Flash Drive By : Edgar Lee
USB flash drive or any other flash memory drive is basically an EEPROM that means "Electrically Erasable Programmable Read Only Memory".
USB flash memory sticks are nothing but an assembly of EEPROM, a controller with a RISC microprocessor, RAM and ROM. All of this interacts with a computer using a USB controller and connector.
Because USB sticks are EEPROM these can hold data for as long as 10 years.
Article Related to: voip singapore, voice over internet protocol, ip pa system, systems integration, computer telephony, voicemail
