Predictive media management for read disturb
AssigneeMicron Technology, Inc.
InventorDaniel James Gunderson
Life of this patent
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Abstract
Methods, systems, and devices for predictive media management for read disturb are described. A read disturbance manager can monitor a bit error rate for a block of a memory die. The read disturbance manager can detect that a degradation of the bit error rate satisfies a degradation threshold specific to the memory die. In some cases, the read disturbance manager can perform a write operation to write data from the block of the memory die to a second block of the memory die based on detecting that the degradation of the bit error rate satisfies the degradation threshold.
Claims20
A method, comprising:
- performing a test read operation on a first block of a first memory die prior to performing a read operation on the first block;
- determining that a degradation of a bit error rate for the first block of the first memory die satisfies a first degradation threshold specific to the first memory die and different from a second degradation threshold specific to a second memory die, wherein the first degradation threshold is set according to a quantity of read operations that triggers a data recovery procedure;
- and
- performing a write operation based at least in part on determining that the bit error rate satisfies the first degradation threshold or on an unsuccessful test read operation.
A memory system, comprising:
- one or more memory devices;
- and
- processing circuitry coupled with the one or more memory devices and configured to cause the memory system to:
- perform a test read operation on a first block of a first memory die prior to performing a read operation on the first block;
- determine that a degradation of a bit error rate for the first block of the first memory die satisfies a first degradation threshold specific to the first memory die and different from a second degradation threshold specific to a second memory die, wherein the first degradation threshold is set according to a quantity of read operations that triggers a data recovery procedure;
- and
- perform a write operation based at least in part on determining that the bit error rate satisfies the first degradation threshold or on an unsuccessful test read operation.
A non-transitory computer-readable medium storing code comprising instructions which, when executed by processing circuitry of an electronic device, cause the electronic device to:
- perform a test read operation on a first block of a first memory die prior to performing a read operation on the first block;
- determine that a degradation of a bit error rate for the first block of the first memory die satisfies a first degradation threshold specific to the first memory die and different from a second degradation threshold specific to a second memory die, wherein the first degradation threshold is set according to a quantity of read operations that triggers a data recovery procedure;
- and
- perform a write operation based at least in part on determining that the bit error rate satisfies the first degradation threshold or on an unsuccessful test read operation.
Dependencies are inferred from the claim text.