# US 11,307,931 B1 · Using zones to manage capacity reduction due to storage device failure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,307,931 B1 - Document ID: US11307931B1 - Status: Granted - Kind: B1 - Application number: 17/207,426 - Filed: 2021-03-19 - Granted: 2022-04-19 - Earliest claimed: 2021-03-19 - Assignees: Micron Technology, Inc. - Applicants: Micron Technology, Inc. - Inventors: Luca Bert - Web page: https://patentgrep.com/patent/US11307931B1 ## CPC - G06F 11/0772: {Means for error signaling, e.g. using interrupts, exception flags, dedicated error registers} - G06F 11/1428: {with loss of hardware functionality} - G06F 11/073: {in a memory management context, e.g. virtual memory or cache management (memory management G06F12/00; testing of static memory units G11C29/00)} - G06F 11/1469: {Backup restoration techniques} - G06F 2201/85: Active fault masking without idle spares - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A system and method for managing a reduction in capacity of a memory sub-system. An example method involving a memory sub-system: configuring the memory device with a zoned namespace comprising a plurality of zones; notifying a host system of a failure associated with a zone of the plurality of zones, wherein the failure affects stored data; receiving from the host system an indication to continue at a capacity that is reduced; recovering the stored data of the zone affected by the failure; and updating the set of memory devices to change the capacity to a reduced capacity. ## Claims ### Claim 1 A system comprising: a memory device; and a processing device, operatively coupled with the memory device, to perform operations comprising: configuring the memory device with a zoned namespace comprising a plurality of zones; notifying a host system of a failure associated with a zone of the plurality of zones, wherein the failure affects stored data; receiving from the host system an indication to continue at a capacity that is reduced; recovering the stored data of the zone affected by the failure; and updating the set of memory devices to change the capacity to a reduced capacity. ### Claim 2 (depends on 1) The system of claim 1, wherein recovering the stored data comprises: accessing recovery data stored by the memory device, wherein the recovery data comprises parity data; and generating the stored data affected by the failure based on the recovery data. ### Claim 3 (depends on 1) The system of claim 1, wherein the operations further comprise: locking the zone associated with the failure, wherein the locking comprises a write lock that enables reads by the host system and disables writes by the host system; providing the host system with data that is recovered in response to a read request for the zone; deleting all the data in the zone; and generating recovery data for the set of memory devices based on the reduced capacity. ### Claim 4 (depends on 1) The system of claim 1, wherein updating the set of memory devices to change the capacity to a reduced capacity comprise updating the zoned namespace to deactivate the zone. ### Claim 5 (depends on 1) The system of claim 1, wherein the operations further comprise: indicating to the host system that the capacity of the set of memory devices is unable to store recovered data; receiving from the host system a storage location to store the recovered data, wherein the storage location is in a main memory of the host system; and providing the recovered data for storage at the storage location. ### Claim 6 (depends on 1) The system of claim 1, wherein the notifying comprises transmitting a message that indicates to the host system a set of one or more zones of the plurality of memory devices that are affected by the failure. ### Claim 7 (depends on 1) The system of claim 1, wherein the system comprises a solid state drive (SSD) and wherein the processing device is a memory controller of the solid state drive. ### Claim 8 A method comprising: configuring the memory device with a zoned namespace comprising a plurality of zones; notifying a host system of a failure associated with a zone of the plurality of zones, wherein the failure affects stored data; receiving, by a processing device, from the host system an indication to continue at a capacity that is reduced; recovering the stored data of the zone affected by the failure; and updating, by the processing device, the set of memory devices to change the capacity to a reduced capacity. ### Claim 9 (depends on 8) The method of claim 8, wherein recovering the stored data comprises: accessing recovery data stored by the memory device, wherein the recovery data comprises parity data; and generating the stored data affected by the failure based on the recovery data. ### Claim 10 (depends on 8) The method of claim 8, further comprising: locking the zone associated with the failure, wherein the locking comprises a write lock that enables reads by the host system and disables writes by the host system; providing the host system with data that is recovered in response to a read request for the zone; deleting all the data in the zone; and generating recovery data for the set of memory devices based on the reduced capacity. ### Claim 11 (depends on 8) The method of claim 8, wherein updating the set of memory devices to change the capacity to a reduced capacity comprise updating the zoned namespace to deactivate the zone. ### Claim 12 (depends on 8) The method of claim 8, further comprising: indicating to the host system that the capacity of the set of memory devices is unable to store recovered data; receiving from the host system a storage location to store the recovered data, wherein the storage location is in a main memory of the host system; and providing the recovered data for storage at the storage location. ### Claim 13 (depends on 8) The method of claim 8, wherein the notifying comprises transmitting a message that indicates to the host system a set of one or more zones of the plurality of memory devices that are affected by the failure. ### Claim 14 (depends on 8) The method of claim 8, wherein the processing device is a memory controller of a solid state drive. ### Claim 15 A non-transitory computer-readable medium storing instructions, which when executed by a processing device, cause the processing device to perform operations comprising: configuring a set of memory devices with a zoned namespace comprising a first zone and a second zone; notifying a host system of a plurality of failures associated with the plurality of zones, wherein a first failure affects stored data of the first zone and a second failure affects stored data of the second zone; receiving from the host system an indication to continue at a capacity that is reduced after each of the plurality of failures; recovering the stored data of the first zone that was affected by the failure; and updating the set of memory devices to change the capacity to a reduced capacity after each of the plurality of failures. ### Claim 16 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein recovering the stored data comprises: accessing recovery data stored by the set of memory devices, wherein the recovery data comprises parity data; and generating the stored data of the first zone based on the recovery data. ### Claim 17 (depends on 15) The non-transitory computer-readable medium of claim 15, further comprising: locking the first zone, wherein the locking comprises a write lock that enables reads by the host system and disables writes by the host system; providing the host system with data that is recovered in response to a read request for the first zone; deleting all the data in the first zone; and generating recovery data for the set of memory devices based on the reduced capacity. ### Claim 18 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein updating the set of memory devices to change the capacity to a reduced capacity comprise updating the zoned namespace to deactivate the first zone. ### Claim 19 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the operations further comprise: indicating to the host system that the capacity of the set of memory devices is unable to store recovered data; receiving from the host system a storage location to store the recovered data, wherein the storage location is in a main memory of the host system; and providing the recovered data for storage at the storage location. ### Claim 20 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the notifying comprises transmitting a message that indicates to the host system that the first zone is affected by the first failure.