VERITAS Storage Foundation 4.1 Oracle Administrator's Guide

Glossary 531
Prerelease 8 September 2005, 8:55am
RAID
A Redundant Array of Independent Disks (RAID) is a disk array set up with part of the combined
storage capacity used for storing duplicate information about the data stored in that array. This
makes it possible to regenerate the data if a disk failure occurs.
redo log files
Redo log files record transactions pending on a database. If a failure prevents data from being
permanently written to datafiles, changes can be obtained from the redo log files. Every Oracle
database has a set of two or more redo log files.
repository
A repository holds the name, type, range of values, source, and authorization for access for each
data element in a database. Pertinent information, needed to display configuration information and
interact with the database, is stored in VxDBA’s repository. The database maintains a repository for
administrative and reporting use.
root disk
The disk containing the root file system.
root disk group
A special private disk group that always exists on the system. The root disk group is named
rootdg.
root file system
The initial file system mounted as part of the UNIX kernel startup sequence.
script
A file, containing one or more commands that can be run to perform processing.
shared disk group
A disk group in which the disks are shared by multiple hosts (also referred to as a cluster-shareable
disk group).
sector
A minimal unit of the disk partitioning. The size of a sector can vary between systems. A sector is
commonly 1024 bytes.
segment
Any partition, reserved area, partial component, or piece of a larger structure.