Owner's manual

68 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.
N
NVDATA
This refers to non-volatile data. It is the configuration information that is part
of and is used by the controller firmware and is stored in the flash memory on
the controller.
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.
P
PCI Express (PCI-E)
PCI Express (PCI-E) is an evolutionary upgrade to the existing Peripheral
Component Interconnect (PCI) bus. PCI-E is a serial connection that operates
more like a network than a bus. Instead of one bus that handles data from
multiple sources, PCI-E has a switch that controls several point-to-point serial
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