| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a magnetic storage apparatus which reduces influence of side erase in writing a read data pattern in measurement of side erase, to provide a head test method, and a head test apparatus. Ž<P>SOLUTION: The magnetic storage apparatus includes: a setting module 33 which sets a plurality of sections divided in the track direction of a magnetic medium and a predetermined reference path along the track direction, and also sets at least one offset for each of the sections such that the offset is different between adjacent sections about the offset being a position of the head with respect to the reference path; a write module which writes a first data pattern to the offset set by the setting module and writes a second data pattern to the reference path a predetermined number of times; a read module which reads the first data pattern written by the write module; and a quality measurement module 34 which measures the quality of the first data pattern read by the read module. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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