# US 10,872,040 B2 · Magnetic disk device and recording method of the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,872,040 B2 - Document ID: US10872040B2 - Status: Granted - Kind: B2 - Application number: 16/783,965 - Filed: 2020-02-06 - Published: 2020-06-04 - Granted: 2020-12-22 - Earliest claimed: 2018-03-19 - Assignees: Kabushiki Kaisha Toshiba; Toshiba Electronic Devices & Storage Corporation - Applicants: Kabushiki Kaisha Toshiba; Toshiba Electronic Devices & Storage Corporation - Inventors: Takahiro Shinbori; Ryuta Kumagai - Web page: https://patentgrep.com/patent/US10872040B2 ## CPC - G06F 12/10: Address translation - G11B 20/1217: {on discs} - G06F 2212/1044: Space efficiency improvement - G11B 2020/1238: {track, i.e. the entire a spirally or concentrically arranged path on which the recording marks are located} - G11B 2020/1292: {Enhancement of the total storage capacity} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) ## Abstract According to one embodiment, a magnetic disk device includes heads and a controller. The heads write data in a recording region of the magnetic disk. The controller divides in order, by a track group with a constant size, an entire region of the recording region where management regions indicating physical positions corresponding to the heads, respectively, creates the track groups so as to straddle the management regions at boundaries of the management regions, and controls writing of the data for each of the track groups. The controller assigns unique and logically consecutive numbers to the track groups and manages information on the management regions to which the track groups belong. ## Claims ### Claim 1 A magnetic disk device comprising: a head which writes data in a recording region of a magnetic disk using a shingled magnetic recording method; and a controller which divides in order, by a track group with a size, an entire region of a recording region of the magnetic disk where a plurality of management regions indicating physical positions corresponding to the head, respectively, are created in advance, creates the track groups so as to straddle the management regions in a radial direction of the magnetic disk at boundaries of the management regions, respectively, and controls writing of the data for each of the track groups. ### Claim 2 (depends on 1) The magnetic disk device of claim 1, wherein the controller in advance assigns a number indicating an order to the management regions, adds an identification code to each of the track groups belonging to the management regions, and converts each of the management regions into a correct physical position by recognizing the identification code at a time of address conversion. ### Claim 3 (depends on 1) The magnetic disk device of claim 1, wherein the controller manages a region a size of which is less than a size of the track group at an end of a management region and a region a size of which is a size of the remaining track group at a top of a next management region as one track group. ### Claim 4 (depends on 1) The magnetic disk device of claim 1, wherein wherein the controller assigns logically consecutive numbers to the track groups, respectively, and manages information on the management regions to which the track groups belong, respectively. ### Claim 5 (depends on 1) The magnetic disk device of claim 1, wherein the controller includes a resizing processor that executes a process of changing a size of the track group into any size. ### Claim 6 (depends on 5) The magnetic disk device of claim 5, wherein the resizing processor executes the size changing process according to a request from a user. ### Claim 7 A magnetic disk device comprising: a plurality of heads which writes data in a recording region of a magnetic disk using a shingled magnetic recording method; and a controller which divides in order, by a track group with a size, an entire region of a recording region of the magnetic disk where a plurality of management regions indicating physical positions corresponding to the heads, respectively, are created in advance, creates the track groups so as to straddle the management regions in a radial direction of the magnetic disk at boundaries of the management regions, respectively, and controls writing of the data for each of the track groups. ### Claim 8 (depends on 7) The magnetic disk device of claim 7, wherein the controller in advance assigns a number indicating an order to the management regions, adds an identification code to each of the track groups belonging to the management regions, and converts each of the management regions into a correct physical position by recognizing the identification code at a time of address conversion. ### Claim 9 (depends on 7) The magnetic disk device of claim 7, wherein the controller manages a region a size of which is less than a size of the track group at an end of a management region and a region a size of which is a size of the remaining track group at a top of a next management region as one track group. ### Claim 10 (depends on 7) The magnetic disk device of claim 7, wherein the controller manages a region a size of which is less than a size of a track group at an end of a management region corresponding to a head and a region a size of which is a size of the remaining track group at a top of a management region corresponding to a next head as one track group. ### Claim 11 (depends on 7) The magnetic disk device of claim 7, wherein wherein the controller assigns logically consecutive numbers to the track groups, respectively, and manages information on the management regions to which the track groups belong, respectively. ### Claim 12 (depends on 7) The magnetic disk device of claim 7, wherein the controller includes a resizing processor that executes a process of changing a size of the track group into any size. ### Claim 13 (depends on 12) The magnetic disk device of claim 12, wherein the resizing processor executes the size changing process according to a request from a user.