# US 12,181,983 B2 · Data storage device, memory controller and method of operating the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,181,983 B2 - Document ID: US12181983B2 - Status: Granted - Kind: B2 - Application number: 18/329,423 - Filed: 2023-06-05 - Published: 2024-06-13 - Granted: 2024-12-31 - Earliest claimed: 2022-12-13 - Assignees: SK hynix Inc. - Applicants: SK hynix Inc. - Inventors: Seung Hun Ji; Min O Song; Jae Il Lee - Web page: https://patentgrep.com/patent/US12181983B2 ## CPC - G06F 11/1441: {Resetting or repowering} - G06F 11/1469: {Backup restoration techniques} - G06F 12/0246: {in block erasable memory, e.g. flash memory} - G06F 12/0292: {using tables or multilevel address translation means (G06F12/023 takes precedence; address translation in virtual memory systems G06F12/10)} - G06F 2201/84: Using snapshots, i.e. a logical point-in-time copy of the data - G06F 2212/1032: Reliability improvement, data loss prevention, degraded operation etc - G06F 2212/2022: Flash memory - G06F 2212/7201: Logical to physical mapping or translation of blocks or pages - G06F 2212/7207: management of metadata or control data - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A data storage device includes a storage and a memory controller. The storage is configured to store data. The memory controller generates meta-data including a mapping relationship between a logical address used in an external device and a physical address used in the storage. The memory controller generates a normal meta-slice having a first size including the meta-data in a first operation mode. The memory controller stores a meta-page including the normal meta-slice in the storage. The memory controller generates a modified meta-slice having a second size as a part of the normal meta-slice in the second operation mode. The memory controller stores a meta-page including the modified meta-slice and context data corresponding to size information of the modified meta-slice in the storage. The memory controller restores the meta-data based on the context data in a power-on mode. ## Claims ### Claim 1 A data storage device comprising: a storage configured to store data; and a memory controller configured to: generate meta-data including a mapping relationship between a logical address used by an external device and a physical address used by the storage, generate a normal meta-slice having a first size including the meta-data in a first operation mode, store a meta-page including the normal meta-slice in the storage, generate a modified meta-slice having a second size as a part of the normal meta-slice in a second operation mode, store a meta-page including the modified meta-slice and context data including information with respect to a size of the modified meta-slice, and restore the meta-data based on the context data in a power-on. ### Claim 2 (depends on 1) The data storage device of claim 1, wherein the second operation mode is a sudden power-off (SPO) generation mode. ### Claim 3 (depends on 1) The data storage device of claim 1, wherein the second size is smaller than the first size. ### Claim 4 (depends on 1) The data storage device of claim 1, wherein the memory controller reads the meta-page from the storage in the power-on and updates meta-data of a normal meta-slice corresponding to the meta-slice in accordance with meta-data in the modified meta-slice to generate an updated meta-slice when the context data in the meta-page has the second size. ### Claim 5 (depends on 4) The data storage device of claim 4, wherein the memory controller generates journal data for instructing a change record of the meta-data and the memory controller stores the journal data in the meta-page. ### Claim 6 (depends on 5) The data storage device of claim 5, wherein the memory controller rebuilds meta-data of the updated meta-slice based on the journal data in the meta-page including the modified meta-slice to generate a rebuilt meta-slice. ### Claim 7 A memory controller comprising: a processor configured to generate meta-data including a mapping relationship between a logical address used by an external device and a physical address used by the storage; a meta-data flush circuit configured to: generate a normal meta-slice having a first size including the meta-data in a first operation mode, store a meta-page including the normal meta-slice in a storage, generate a modified meta-slice having a second size as a part of the normal meta-slice in a second operation mode, and store a meta-page including the modified meta-slice and context data including information with respect to a size of the modified meta-slice; and a meta-data rebuild circuit configured to restore the meta-data based on the context data in a power-on. ### Claim 8 (depends on 7) The memory controller of claim 7, wherein the second operation mode is a sudden power-off (SPO) generation mode. ### Claim 9 (depends on 7) The memory controller of claim 7, wherein the second size is smaller than the first size. ### Claim 10 (depends on 7) The memory controller of claim 7, wherein the meta-data rebuild circuit reads the meta-page from the storage in the power-on and updates meta-data of a normal meta-slice corresponding to the meta-slice in accordance with meta-data in the modified meta-slice to generate an updated meta-slice when the context data in the meta-page has the second size. ### Claim 11 (depends on 10) The memory controller of claim 10, wherein the meta-data rebuild circuit generates journal data for instructing a change record of the meta-data and the memory controller stores the journal data in the meta-page. ### Claim 12 (depends on 11) The memory controller of claim 11, wherein the meta-data rebuild circuit rebuilds meta-data of the updated meta-slice based on the journal data in the meta-page including the modified meta-slice to generate a rebuilt meta-slice. ### Claim 13 A method of operating a data storage device, the data storage device including a storage and a memory controller configured to control the storage, the method comprising: generating meta-data including a mapping relationship between a logical address used by an external device and a physical address used by the storage by the memory controller; generating a normal meta-slice having a first size including the meta-data in a first operation mode by the memory controller; storing a meta-page including the normal meta-slice in the storage by the memory controller; generating a modified meta-slice having a second size as a part of the normal meta-slice in a second operation mode by the memory controller; storing a meta-page including the modified meta-slice and context data including information with respect to a size of the modified meta-slice by the memory controller; and restoring the meta-data based on the context data in a power-on by the memory controller. ### Claim 14 (depends on 13) The method of claim 13, wherein the second operation mode is a sudden power-off (SPO) generation mode. ### Claim 15 (depends on 13) The method of claim 13, wherein the second size is smaller than the first size. ### Claim 16 (depends on 13) The method of claim 13, further comprising: reading the meta-page from the storage in the power-on by the memory controller; and updating, by the memory controller, meta-data of a normal meta-slice corresponding to the meta-slice in accordance with meta-data in the modified meta-slice to generate an updated meta-slice when the context data in the meta-page has the second size. ### Claim 17 (depends on 16) The method of claim 16, further comprising generating journal data for instructing a change record of the meta-data and the memory controller stores the journal data in the meta-page by the memory controller. ### Claim 18 (depends on 17) The method of claim 17, further comprising rebuilding meta-data of the updated meta-slice based on the journal data in the meta-page including the modified meta-slice to generate a rebuilt meta-slice by the memory controller.