How a hard disk drive writes data
To write data on the hard disk, a magnetic field is placed on the tiny fields with a RW (read, write) head, in one of these two polarities: north-south, or south-north.
An orientation in one direction, like north-south can represent the 0 while the opposite orientation south-north would then represent a 1.
An orientation in one direction, like north-south can represent the 0 while the opposite orientation south-north would then represent a 1.
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