HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and Configuration Guide

Glossary
–13HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and
Configuration Guide
Glossary–13
Mbps
Approximately one million (10
6
) bits per second—that is, megabits per
second.
maintenance
terminal
An EIA-423-compatible terminal used with the controller. This
terminal is used to identify the controller, enable host paths, enter
configuration information, and check the controller status. The
maintenance terminal is not required for normal operations.
See also local terminal.
member
A container that is a storage element in a RAID array.
metadata
The data written to a disk for the purposes of controller administration.
Metadata improves error detection and media defect management for
the disk drive. It is also used to support storageset configuration and
partitioning. Nontransportable disks also contain metadata to indicate
they are uniquely configured for StorageWorks environments. Metadata
can be thought of as “data about data.”
mirroring
The act of creating an exact copy or image of data.
mirrored
write-back
caching
A method of caching data that maintains two copies of the cached data.
The copy is available if either cache module fails.
mirrorset
See RAID level 1.
MIST
Module Integrity Self-Test.
multibus
failover
Allows the host to control the failover process by moving the units
from one controller to another.
N_port
A port attached to a node for use with point-to-point topology or fabric
topology.
NL_port
A port attached to a node for use in all topologies.
network
In data communication, a configuration in which two or more terminals
or devices are connected to enable information transfer.
node
In data communications, the point at which one or more functional
units connect transmission lines.
Non-L_Port
A Node of Fabric port that is not capable of performing the Arbitrated
Loop functions and protocols. N_Ports and F_Ports loop-capable ports.