SOLUTION FOR SUPER DEVICE IMBALANCE IN ZNS SSD
Abstract:
A data storage device includes a memory device and a controller coupled to the memory device. The memory device includes at least a first super device and a second super device. Each of the super devices includes a plurality of active zones and a threshold value for a number of cold zones. The controller classifies zones as either a cold zone or hot zone depending the number of resets to the zone. If the number of resets to the zone is greater than a threshold reset value, then the zone is classified as a hot zone, otherwise the zone is classified as a cold zone. The controller is configured to determine that the number of cold zones is greater than the threshold value for a super device and move data from at least one cold zone from the super device to a zone of another super device.
Patent Agency Ranking
0/0