Because the two sides are independent of each other they are labelled either ‘A’ and ‘B’, or ‘1’ and ‘2’ to help distinguish between them. This means that single-sided disk drives can still read both sides by flipping the disk. These disks are double sided, but with each side re maining independent. Used for data storage and backup.ĭisks: Amsoft, Maxell, Matsushita, Tatung These are the Tatung Einstein, Sega SF-7000, Osborne and several Amstrad models including the ZX Spectrum +3, PCW 8512, 8256, 9512, CPC 6128.Ī limited number of individual users and small organisations. Only a few machines have inb uilt 3” drives. Amstrad computers, which included a 3” drive, stopped being produced in the late 1990s Never reached huge popularity due to dominance of 3.5” disks and then declined in 1990s.
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