Adaptive target charge to equalize bit errors across page types

摘要

Systems, methods and/or devices are used to adapt a target charge to equalize bit errors across page types for a storage medium, such as flash memory, in a storage system. In one aspect, the method includes performing a sequence of operations, including: (1) determining a first target charge, a second target charge, and a third target charge, the first, second, and third target charges used for controlling first, second, and third charge distributions, respectively, in cells of the storage medium when data is written to the cells, wherein the second charge distribution is between the first charge distribution and the third charge distribution, (2) determining a first error indicator for lower/fast pages of the storage medium, (3) determining a second error indicator for upper/slow pages of the storage medium, and (4) adjusting the second target charge in accordance with the first error indicator and the second error indicator.

主权项

1. A method of setting target charges for a storage medium in a storage system, the method comprising:
performing a sequence of operations, including:
determining a first target charge, a second target charge, and a third target charge, the first, second, and third target charges used for controlling first, second, and third charge distributions, respectively, in cells of the storage medium when data is written to the cells, wherein the second charge distribution is between the first charge distribution and the third charge distribution;determining a first error indicator for lower/fast pages of the storage medium;determining a second error indicator for upper/slow pages of the storage medium; andadjusting the second target charge in accordance with the first error indicator and the second error indicator.