Glossary
Manual No. 775029
G-23
Recovery
The process of reconstructing data from a failed disk using data from other
drives.
Redundancy
The inclusion of extra components of a given type in a system (beyond those
required by the system to carry our its functions.)
Replacement Table
A replacement table contains information regarding which SCSI devices
have been replaced by others through standby replacement.
RISC
Reduced Instruction Set Computing, an architecture for an application-
specific processor.
RJ-11, RJ-45
RJ (registered jacks, sometimes described as RJ-XX), a series of telephone
connection interfaces (receptacle and plug) that are registered with the U.S.
Federal Communications Commission (FCC). The most common telephone
jack is the RJ-11 jack, which can have six conductors but usually is
implemented with four. The RJ-11 jack is likely to be the jack that your
household or office phones are plugged into from the ordinary "untwisted"
wire (sometimes called "gray satin" or "flat wire") people are most familiar
with. The RJ-45 is a single-line jack for digital transmission over ordinary
phone wire, either untwisted or twisted. The interface has eight pins or
positions.
ROM
Built-in computer memory containing data that can only be read, not written
to. ROM normally contains the programming that allows a computer to be
"booted up" each time you turn it on. Unlike a computer's random access
memory (RAM), the data in ROM is pre-recorded in the manufacturing
process and it is not lost when the computer power is turned off.
