7.1. Overview of Tape Storage

Tape jukeboxes (or silos) consist of a number of tape cartridges, tape drives, and robot arms. The data is stored on reels of tapes housed in cartridges (or cassettes). There are a large number of different tape formats that are distinguished according to the following criteria: 1) tape track orientation, 2) tape width, and 3) cartridge size [88]. The current tape technologies primarily use one of the two tape track orientations: helical-scan, or serpentine [88], [111], [95]. With helical-scan recording, the data is recorded in diagonal stripes using a rotating drum (that contains the read/write heads) and a slow moving motor (that runs the tape over the drum). The axis of the drum is slightly slanted and, hence, ...

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