Patent ID: 7808836

Claim:
A storage system, comprising: respective sets of non-volatile storage elements, the non-volatile storage elements being multi-level storage elements; a non-volatile storage location; and at least one control circuit, the at least one control circuit: a) measures respective threshold voltage distributions for the respective sets of non-volatile storage elements, b) determines a respective set of voltages for each respective set of non-volatile storage elements based on the respective threshold voltage distribution, the respective set of voltages is customized for the respective set of non-volatile storage elements, c) stores, in the non-volatile storage location, each set of voltages, and d) after the storing, obtains at least one of the respective sets of voltages from the non-volatile storage location, and performs a write operation involving at least one of the respective sets of non-volatile storage elements using the at least one of the respective sets of voltages.