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The rear media tray snaps into the back cover and is responsible for securing the CD. This is achieved by a central circular hub of spring-loaded teeth that grip and effectively suspend the disc above the tray surface, preventing the recording surface from being scratched.
In computer hardware, a caddy is a container used to protect an optical media disc from damage when handling. Its functionality is similar to that of the 3.5" floppy disk 's jacket. Its use dates back to at least the Capacitance Electronic Disc in 1981, and they were also used in initial versions of the Blu-ray Disc . [ 1 ]
Sony released its CDP-101 CD player [44] in 1982 with a slide-out tray design for the CD. As it was easy to manufacture and to use, most CD player manufacturers stayed with the tray style ever since. [45] [46] The tray mechanism is also used in many modern desktop computer cases, as well as the Philips CD-i, PlayStation 2, Xbox and Xbox 360 ...
The Imation RipGo! was a portable CD-R burner that was a similar form factor to that of the Memorex Mini CD player. Again, it was marketed as an MP3 device, and it could play MP3 and WMA files burned onto Mini CD media. It was powered by an internal lithium-ion battery that could power the unit for five hours of playback.
Dye based optical media should not be solely relied on to archive valuable data. MAM-A claims a life of 300 years on their archival gold CD-R and 100 years for gold DVDs. Good alternatives would be to additionally backup one's media using other media technologies and/or investing in non-volatile memory technologies. [11]
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The CD-ROM format has a storage capacity of 650 MB. Also in 1984, Sony introduced a LaserDisc data storage format, with a larger data capacity of 3.28 GB. [59] In September 1992, Sony announced the MiniDisc format, which was supposed to combine the audio clarity of CD's and the convenience of a cassette size. [60]
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