Meaning of CYLINDER in English
< storage > The set of tracks on a multi-headed disk that may be accessed without head movement. That is, the collection of disk tracks which are the same distance from the spindle about which the disks rotate. Each such group forms the shape of a cylinder. Placing data that are likely to be accessed together in cylinders reduces the access significantly as head movement ( seeking ) is slow compared to disk rotation and switching between heads.
FOLDOC computer English dictionary. Английский словарь по компьютерам FOLDOC. 2012