System information

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Eclipse™ 2640 SAN Router Administration and Configuration Manual
Glossary
pull-down menu See drop-down menu.
PWA See printed wiring assembly.
R
radio frequency
interference
RFI. Electromagnetic radiation which is emitted by electrical circuits
carrying rapidly changing signals, as a by-product of the normal
operation, and which causes unwanted signals (interference or noise)
to be induced in other circuits.
RAID See redundant array of independent disks.
RAM See random access memory.
random access
memory
RAM. A group of computer memory locations that is numerically
identified to allow high-speed access by the controlling
microprocessor. A memory location is randomly accessed by
referring to its numerical identifier (D). Contrast with
read-only
memory. See also dynamic random access memory; nonvolatile
random access memory; static random access memory.
R_A_TOV See resource allocation time-out value.
read-only memory ROM. An information storage chip with permanent memory. Stored
information cannot be changed or deleted except under special
circumstances (D). Contrast with
random access memory.
redundancy Performance characteristic of a system or product whose integral
components are backed up by identical components to which
operations will automatically failover in the event of a component
failure. Redundancy is a vital characteristic of virtually all
high-availability (24 hours/7 days per week) computer systems and
networks.
redundant array of
independent disks
RAID. Grouping of hard drives in a single system to provide greater
performance and data integrity. RAID systems have features that
ensure data stored on the drives are safe and quickly retrievable.
remote notification A process by which a system is able to inform remote users and
workstations of certain classes of events that occur on the system.
E-mail notification and the configuration of simple network