| 摘要 |
<p>A disk (OD) rotated at one (N2) of prescribed rotation speeds (N1 - N4) so as to record information is used. The disk (OD) includes a data area (DA2) formed spirally or concentrically with a center of rotation, in which information is recorded when the disk (OD) is being rotated at the rotation speed (N2), and a management area (MA2) in which management information associated with writing is recorded at the rotation speed (N2) when writing is to be performed in the data area (DA2) during rotation of the disk (OD) at the rotation speed (N2). The management area (MA2) is formed spirally or concentrically with the center of rotation of the disk on a side farther from the center of rotation of the disk (OD). <IMAGE></p> |
