Digital Equipment AlphaServer 2000, Owner'S Manual

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portability
The degree to which a software application can be easily moved
from one computing environment to another.
porting
Adapting a given body of code so that it will provide equivalent
functions in a computing environment that differs from the
original implementation environment.
power-down
The sequence of steps that stops the flow of electricity to a
system or its components.
power-up
The sequence of events that starts the flow of electrical current
to a system or its components.
primary cache
The cache memory that is the fastest and closest to the processor.
processor module
Module that contains the CPU chip.
program mode
The state in which the system console terminal is under the
control of a program other than the console program.
RAID
Redundant array of inexpensive disks. A technique that
organizes disk data to improve performance and reliability.
RAID has three attributes:
• It is a set of physical disks viewed by the user as a single
logical device.
• The user’s data is distributed across the physical set of
drives in a defined manner.
• Redundant disk capacity is added so that the user’s data can
be recovered even if a drive fails.
Glossary–13