Digital Equipment DEC 3000 Series Service Information page 420

restore
In software, to recover files or software that were backed up,
copying the material from the backup medium (such as a tape or
diskette) to the medium you normally use.
In hardware, to return the system to an operating condition.
RISC
See Reduced Instruction Set Computer.
ROM
See read-only memory.
satellite
A node that is booted remotely from the system disk on the
boot node. Also, a computer system that obtains a specific set of
services from a server system.
SCSI
See Small Computer Systems Interface.
SCSI bus
A communications pathway between the Small Computer Systems
Interface (SCSI) and other internal devices. The SCSI bus
consists of an address bus, which selects the location of the data,
and a data bus, which transfers the data.
SCSI controller
The device that directs the operations of the Small Computer
Systems Interface (SCSI) with synchronous and asynchronous
capabilities.
SCSI jumpers
Removable electrical connectors on some of the drives, such
as the RRD42, that determine the SCSI setting on a drive.
Each installed drive must have a unique setting for proper
communication between the system and all drives.
SCSI switches
Electrical switches on the side or back of some drives, such
as the RX26, that determine the SCSI setting of the drive.
Each installed drive must have a unique setting for proper
communication between the system and all drives.
secondary cache
A random access mass storage area implemented on devices such
as disks. Compare with main memory.
segment
A length of ThinWire Ethernet cable made up of one or more
cable sections connected with barrel connectors or T-connectors.
Glossary–20