Combination scan management for block families of a memory device
An example memory sub-system includes a memory device and a processing device, operatively coupled to the memory device. The processing device is configured to initiate a scan process on a plurality of block families of the memory device; responsive to determining, based on the scan process, that a first block family of the plurality of block families and a second block family of the plurality of block families meet a combining criterion, merge the first block family and the second block family; and responsive to determining that a terminating condition has been satisfied, terminate the scan process.
1. A system comprising:
a memory device; and
a processing device, operatively coupled to the memory device, the processing device is to perform operations comprising:
initiating a scan process on a plurality of block families of the memory device;
responsive to determining, based on the scan process, that a first block family of the plurality of block families and a second block family of the plurality of block families meet a combining criterion, merging the first block family and the second block family, wherein the combining criterion is based on a data state metric reflecting a temporal voltage shift (TVS) of blocks associated with respective block family of the plurality of block families; and
responsive to determining that a terminating condition has been satisfied, terminating the scan process.
2. The system of claim 1 , wherein initiating the scan process is performed responsive to determining that a triggering condition has been satisfied.
3. The system of claim 2 , wherein determining that the triggering condition has been satisfied comprises at least one of:
determining that a number of free block family entries within a metadata table is below a threshold; or
determining that a predetermined period of time has elapsed since execution of a previous scan process.
4. The system of claim 1 , wherein the plurality block families are ordered from newest block families to oldest block families.
5. The system of claim 1 , wherein the operations further comprise:
updating the combining criterion based on a number of free block family entries within a metadata table, during execution of the scan process, wherein more or less block families are combined based on the updated combining criterion.
6. The system of claim 1 , wherein the operations further comprise:
updating voltage offset bin assignments of one or more block families of the plurality of block families.
7. The system of claim 1 , wherein the combining criterion is updated during execution of the scan process.
8. The system of claim 1 , wherein determining that the terminating condition has been satisfied comprises at least one of:
determining that a number of free block family entries within a metadata table reached a threshold;
determining that the plurality of block families has been scanned; or
determining that a number of host-initiated requests received at the memory device during execution of the scan process exceeds a threshold.
9. A method comprising:
detecting that a number of free block family entries within a metadata table of a memory device is below a predetermined threshold;
initiating a scan process on a plurality of block families referenced by the metadata table; and
responsive to determining, based on the scan process, that a first block family of the plurality of block families and a second block family of the plurality of block families meet a combining criterion, merging the first block family and the second block family, wherein the combining criterion is based on a data state metric reflecting a temporal voltage shift (TVS) of blocks associated with respective block family of the plurality of block families.
10. The method of claim 9 , wherein merging the first block family and the second block family further comprises:
assigning blocks of the second block family to the first block family; and
deleting an entry associated with the second block family from the metadata table.
11. The method of claim 9 , wherein merging the first block family and the second block family further comprises:
adding, to the metadata table, a metadata item referencing a new block family;
assigning blocks of the first block family and blocks of the second block family to the new block family; and
deleting entries associated with the first block family and the second block family from the metadata table.
12. The method of claim 9 , wherein the plurality block families are ordered from newest block families to oldest block families.
13. The method of claim 9 further comprising:
responsive to determining that a terminating condition has been satisfied, terminating the scan process.
14. The method of claim 13 , determining that the terminating condition has been satisfied comprises at least one of:
determining that a number of free block families entries within a metadata table reached a threshold;
determining that the plurality of block families has been scanned; or
determining that a number of host-initiated requests received at the memory device during execution of the scan process exceeds a threshold.
15. A non-transitory computer-readable storage medium comprising instructions that, when executed by a processing device, cause the processing device to:
initiate a scan process on a plurality of block families of the memory device;
responsive to determining, based on the scan process, that a first block family of the plurality of block families and a second block family of the plurality of block families meet a combining criterion, merge the first block family and the second block family, wherein the combining criterion is based on a data state metric reflecting a temporal voltage shift (TVS) of blocks associated with respective block family of the plurality of block families; and
responsive to determining that a terminating condition has been satisfied, terminate the scan process.
16. The non-transitory computer-readable storage medium of claim 15 , wherein the processing device is to initiate the scan process responsive to determining that a triggering condition has been satisfied.
17. The non-transitory computer-readable storage medium of claim 16 , wherein the trigerring condition comprises at least one of:
determining that a number of free block family entries within a metadata table is below a threshold; or
determining that a predetermined period of time has elapsed since execution of a previous scan process.
18. The non-transitory computer-readable storage medium of claim 15 , wherein the plurality block families are ordered from newest block families to oldest block families.
19. The non-transitory computer-readable storage medium of claim 15 , wherein the processing device is further to:
merge a subset of the plurality of block families into a single block family, responsive to determining that the subset of the plurality of block families meets a combining criterion, the subset of block families comprising two or more block families.