IBM SAN32M1, Installation And Service Manual

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SAN32M1 Fabric Switch Installation and Service Manual 568
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 microproces-
sor. 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 mem-
ory ; 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 cir-
cumstances (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 opera-
tions 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.
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 manage-
ment protocol (SNMP) trap recipients are two examples of remote
notification programs that can be implemented on director-class
switches.
remote user
workstation
Workstation, such as a personal computer (PC), using EFC Manager
application and Element Manager application software that can
access the EFC Server over a local area network (LAN) connection.
repeater A device that generates and often amplifies signals to extend trans-
mission distance.
rerouting delay An option that ensures that frames are delivered in order through the
fabric to their destination.
resource allocation
time-out value
R_A_TOV. R_A_TOV is a value used to time-out operations that
depend on the maximum possible time that a frame could be delayed
in a fabric and still be delivered.
RFI See radio frequency interference .