Patent ID: 11907113
Assignee: TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A magnetic disk device comprising:
magnetic disks;
heads each of which writes data to the magnetic disk and reads data from the magnetic disk; and
a controller which does not allocate logical addresses to sectors of a first area to be specified in such a manner as to correspond to a defect existing in a predetermined recording area, the first area being within the predetermined recording area constituted of a plurality of cylinders adjacent to each other in the magnetic disks, and uniquely allocates logical addresses to sectors of a second area other than the first area, wherein
the controller makes allocation of logical addresses to the sectors of the second area different from each other according to the number of defects existing in the predetermined recording area.