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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 ]
The media was compatible with existing CD drives, allowing music and data to be recorded and then read in any existing drive. Over time, this became known as CD-R . [ 9 ] In 1990, the Orange Book added magnetic-optical re-writable versions of the CD physical format, CD-MO , which differed from earlier MO systems primarily in that the disk was ...
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]
Disk storage is now used in both computer storage and consumer electronic storage, e.g., audio CDs and video discs (VCD, DVD and Blu-ray). Data on modern disks is stored in fixed length blocks, usually called sectors and varying in length from a few hundred to many thousands of bytes. Gross disk drive capacity is simply the number of disk ...
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 ...
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As of 2007 DVD is the de facto standard for pre-recorded movies, and popular storage of data beyond the capacity of CD. With the development of high-definition television , and the popularization of broadband and digital storage of movies, a further format development took place, again giving rise to two camps: HD DVD and Blu-ray , based upon a ...
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