CD/DVD Media Commonly Used Terms
This section defines commonly used terms related to CD/DVD
media.
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CD-R
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CD read media that can be written once and
after that, can only be read.
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CD-RW
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CD rewritable media that can be written to and
erased. CD-RW media can only be read by CD-RW
devices.
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DVD-R
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Digital video disk (recordable) that can be
written once and after that, can only be read.
These devices have much larger capacity than
CD-R media.
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DVD+R
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Digital video disk (recordable) that can be
written once and after that, can only be read.
DVD+R devices have more complete error
management system than DVD-R, which allows more
accurate burning to media, independent of the
quality of the media.
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DVD-RW
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Digital video disk (rewritable) with storage
capacity equal to a DVD-R. This media can be
re-recorded after erasing the entire
disk.
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DVD+RW
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Digital video disk (random-access rewritable)
with storage capacity equal to a DVD+R. This
medium allows overwriting of individual blocks
without erasing the entire disk.
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DVD-RAM
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Digital video disk (random access memory,
rewritable) with circular rather than spiral
tracks and hard sectoring.
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ISO 9660
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ISO, an acronym for Industry Standards
Organization, is an organization that sets
standards for computer storage formats.
An ISO 9660 file system is a standard CD or
DVD file system that enables you to read the
same CD or DVD on any major computer platform.
The standard, issued in 1988, was written by an
industry group named High Sierra, named after
the High Sierra Hotel in Nevada. Almost all
computers with CD or DVD drives can read files
from an ISO 9660 file system.
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Joliet extensions
Rock Ridge extensions
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Adds Windows file system information.
Adds UNIX file system information. (Rock Ridge
is named after the town in the movie Blazing
Saddles.)
Note -
These extensions are not mutually
exclusive. You can specify both
mkisofs
–R and –j
options for compatibility with both systems.
(For more information, see the mkisofs(8) man
page.)
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MMC-compliant recorder
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Acronym for Multi Media Command, which means
these recorders comply with a common command
set. Programs that can write to one
MMC-compliant recorder should be able to write
to all other recorders.
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Red Book CDDA
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Acronym for Compact Disc Digital Audio, which
is an industry standard method for storing
digital audio on compact discs. Also known by
the term "Red Book" format. The
official industry specification calls for one or
more audio files sampled in 16-bit stereo sound
at a sampling rate of 44.1 kilohertz
(kHz).
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Commonly used terms when writing to CD media are listed in the
following table.
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blanking
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The process of erasing data from the CD-RW
media.
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session
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A complete track with lead-in and lead-out
information.
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track
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A complete data or audio unit.
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