Dell GX240 - OptiPlex Pentium 4 1.8GHz 512MB 40GB CD Win2K, User Manual, Page: 291 / 298

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PXE
Pre-boot eXecution Environment . A standard of WfM that allows networked
computers that do not have an OS to be configured and started remotely.
PXE benefits include:
• The client computer does not necessarily need its own OS or even a hard drive.
• The client computer can be remotely shut down and restarted.
• Since PXE is an industry standard, new computers can easily be added to the
network.
RAID
Redundant Array of Independent Disks
. A system of two or more drives working
together for performance and fault tolerance. RAID drives are typically used
on servers and high-end PCs .
There are a number of different RAID levels. The three most common are 0,
3, and 5:
• Level 0: Provides data striping but no redundancy. This improves performance
but does not provide fault tolerance.
• Level 3: Same as Level 0, but also reserves one dedicated drive for error
correction data, providing good performance and some level of fault tolerance.
•
Level 5:
Provides data striping at the byte level and also stripe error correction
information. This results in excellent performance and good fault tolerance.
RAM
Random-access memory . The primary temporary storage area for program
instructions and data. RAM is stored in chips on small circuit boards called
SIMMs , DIMMs , or RIMMs , that attach to the system board. RAM, unlike
ROM , is volatile, which means that, when you turn off your computer, any
information stored in RAM is lost.
Rambus
Rambus is a memory technology that is designed to work with existing system
board standards as an alternative to DRAM . See also RIMM , RDRAM , and
DRDRAM .
RDRAM
Rambus dynamic random-access memory ( DRAM ) . A memory subsystem that
can optimally transfer up to 1.6 billion bytes of data per second. The
subsystem consists of RAM , the RAM controller, and the bus connecting
RAM to the microprocessor and other devices in the computer. See also
DRDRAM .