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 from.
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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 from. 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 from. DVD+R devices have more
complete error management system than DVD-R, which allows for
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 by first 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. (See
mkisofs for details.)
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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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