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DISC SIZE AND CAPACITY
CD-R and CD-RW discs come in standard 12 cm (120 mm) and 8 cm (80 mm) sizes. The most popular is the larger 12 cm type which has the same physical dimension as most commercial audio CDs and computer software CD-ROMs. 8 cm discs are less common but, thanks to their smaller size, are gaining popularity for use in consumer electronic devices such as portable compressed digital audio players, digital still image cameras and data storage products like miniature CD recorders.
Once written, CD-R discs closely mimic the optical characteristics of prerecorded (pressed) CDs. As a result, they can be read on almost any computer CD-ROM drive, CD-R or CD-R/RW recorder or MultiRead-compliant DVD-ROM drive or recorder. Additionally, CD-R discs are compatible with most consumer electronics devices including portable, car and set-top CD audio players and MultiPlay-compliant DVD-Video players and recorders. All DVD devices that read CD-R discs do not necessarily display the MultiRead or MultiPlay logos. If in doubt, consult with the hardware manufacturer.
Written CD-RW discs have slightly different optical characteristics (lower reflectivity and signal modulation) than prerecorded (pressed) and written CD-R discs and therefore are not as widely compatible. They can be read only on MultiRead-compliant CD-ROM drives, CD-R/RW recorders and MultiRead-compliant DVD-ROM drives and recorders. CD-RW discs are, in addition, compatible with some consumer electronics devices including MultiPlay-compliant portable, car and set-top CD audio players and MultiPlay-compliant DVD-Video players and recorders. Again, all CD and DVD devices that read CD-RW discs do not necessarily display the MultiRead or MultiPlay logos. If in doubt, consult with the hardware manufacturer.
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