User's Guide

Glossary
Quantum A-Series Tape Drives User’s Guide 86
first to describe the structure of the file and its play out structural
metadata
but also to let the user specify its own metadata
annotating the content of the file
descriptive metadata.
This format is also designed to ensure the interchange of data in a
streaming environment such as data tape storage or networked
communications.
N
Native Capacity
The capacity of a given media product in its basic
recording format (without the use of data compression).
Native Mode Refers to the uncompressed storage capacity of a media
subsystem. (See Native Capacity.)
O
Op1a The simplest and most common operational pattern containing a
single
source package which is played as is by the unique material
package
. Files produced by the Evtr from Sony are an extension of
the
Op1a.
OpAtom This operational pattern embeds a single source package which
consists in a single source (only video or audio). However, the
material package may allow building complex editing (Op1a, Op1b,
Op2a, and Op2b
) by referencing source packages from other
OpAtom files.
Operational Pattern This term is used to designate the complexity of an
MXF file. It describes the possibilities for building the
material
packages
.
P
Parity
A method of generating redundant information that can be used
to detect errors in stored or transmitted data.
Peripheral A device added to a system as a complement to the basic
central processing unit (CPU), such as a disk drive, tape drive, or
printer.
Positive Engagement Buckling Mechanism A highly robust, solidly
engineered media leader-buckling mechanism for heavy-duty-
cycle automated environments.
POST Power-on Self-Test. When power is applied to the tape drive, it
performs a POST.