US 2023/0282231 A1Published application

Magnetic disk device and method

AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation

InventorsHidekazu MASUYAMA, Osamu YOSHIDA

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Abstract

According to one embodiment, first setting information and second setting information are stored in a memory included in a magnetic disk device. The first setting information indicates a second track that is a first track set to be disused on the basis of a defect inspection among a plurality of first tracks included in a magnetic disk. The second setting information indicates a third track selected from one or more first tracks different from the second track. In a case where an access destination is a user area, the controller converts logical address information into physical address information while slipping the second track and the third track. In a case where an access destination is a system area, the controller converts logical address information into physical address information while slipping all of the first tracks other than the third track among the plurality of first tracks.

Claims18

Dependent claims

A magnetic disk device comprising:

a magnetic disk having a plurality of first tracks;
a magnetic head;
a memory that stores first setting information indicating a second track that is a first track set to be disused on a basis of a defect inspection among the plurality of first tracks, and second setting information indicating a third track selected from one or more first tracks different from the second track among the plurality of first tracks;
and
a controller
that converts, in a case where an access destination is a user area, first address information indicating the access destination in a logical address space into second address information indicating a position on the magnetic disk while slipping the second track and the third track on a basis of the first setting information and the second setting information, moves the magnetic head to the position indicated by the second address information, and accesses the magnetic disk, and
that converts, in a case where an access destination is a system area, third address information indicating the access destination in the logical address space into fourth address information indicating a position on the magnetic disk while slipping all of the first tracks other than the third track among the plurality of first tracks on a basis of the second setting information, moves the magnetic head to the position indicated by the fourth address information, and accesses the magnetic disk.

4 more elements

A method of controlling a magnetic disk device including a magnetic disk having a plurality of first tracks, the method comprising:

converting, in a case where an access destination is a user area, first address information indicating the access destination in a logical address space into second address information indicating a position on the magnetic disk while slipping a second track, which is a first track set to be disused on a basis of a defect inspection among the plurality of first tracks, and a third track, which is selected from one or more first tracks different from the second track among the plurality of first tracks, on a basis of first setting information indicating the second track and second setting information indicating the third track, moving a magnetic head to the position indicated by the second address information, and accessing the magnetic disk;
and
converting, in a case where an access destination is a system area, third address information indicating the access destination in the logical address space into fourth address information indicating a position on the magnetic disk while slipping all of the first tracks other than the third track among the plurality of first tracks on a basis of the second setting information, moving the magnetic head to the position indicated by the fourth address information, and accessing the magnetic disk.

Dependencies are inferred from the claim text.