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Which of these materials is used to make the platter on a disk?
Aluminum
Glass
Ceramic
Any of these
Any of the listed materials can be used to make a disk platter. https://en.wikipedia.org/wiki/Harddiskdrive_platter EDIT: BAD WORDED, though the platter can be glass or ceamic, There is no glass or ceramic 'alloy'... EDIT:: a glass platter hard disk !!!!? Could be after 2099EDIT:: Yes, glass platter are used in 2.5" Hard Drives.
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