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84 Glossary
M
MHz
Megahertz or one million cycles per second is a unit of frequency commonly
used to measure the operating speed of a computer processor or any other
electronic component.
Mirroring
The process of providing complete redundancy using two physical disks, by
maintaining an exact copy of one physical disk’s data on the second physical disk.
If one physical disk fails, the contents of the other physical disk can be used to
maintain the integrity of the system and to rebuild the failed physical disk.
O
Operating System
The software that runs a computer, including scheduling tasks, managing
storage, and handling communication with peripherals and performs basic
input/output functions, such as recognizing input from the keyboard, sending
output to the display screen, etc. is called an operating system.
PERC H200.book Page 84 Tuesday, July 13, 2010 4:15 PM