US 11,656,938 B2
Preemptive read verification after hardware write back
Frederick Adi, Castro Valley, CA (US); Zhenlei Shen, Milpitas, CA (US); and Wei Wang, Dublin, CA (US)
Assigned to Micron Technology, Inc., Boise, ID (US)
Filed by Micron Technology, Inc., Boise, ID (US)
Filed on Aug. 18, 2021, as Appl. No. 17/445,345.
Claims priority of provisional application 63/198,087, filed on Sep. 28, 2020.
Prior Publication US 2022/0100605 A1, Mar. 31, 2022
Int. Cl. G06F 11/00 (2006.01); G06F 11/10 (2006.01); G06F 11/07 (2006.01); G06F 3/06 (2006.01)
CPC G06F 11/1068 (2013.01) [G06F 3/0619 (2013.01); G06F 3/0659 (2013.01); G06F 3/0679 (2013.01); G06F 11/076 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, at a memory sub-system controller and from a non-volatile memory device, an indication that a hardware component on the memory device performed a write back operation for a management unit in the non-volatile memory device;
responsive to receiving the indication that the write back operation was performed, initiating, by the memory sub-system controller, a read verify operation to be performed by the hardware component on the non-volatile memory device for the management unit;
receiving, at the memory sub-system controller and from the non-volatile memory device, an indication of a number of write back errors associated with the management unit during the read verify operation;
determining, by the memory sub-system controller, whether the number of write back errors satisfies a read verify threshold criterion; and
responsive to the number of write back errors satisfying the read verify threshold criterion, remapping, by the memory sub-system controller, the management unit to a different location on the non-volatile memory device.