| 摘要 |
PROBLEM TO BE SOLVED: To improve data reliability.SOLUTION: A memory device has a magnetic disc, a head and a controller. The head includes a write part for outputting a magnetic field to record write data to a recording area of a magnetic disc irradiated with light and a read part for reading read data from the recording area of the magnetic disc. The controller detects whether an off-set of the write part has occurred while the write part is writing to the recording area of the magnetic disc on the basis of a first spectrum of first read data read by the read part at a first position of the magnetic disc and a second spectrum of second read data read by the read part at a second position succeeding the first position.SELECTED DRAWING: Figure 3 |
