Abstract: A method for initiating a refresh operation of a solid-state nonvolatile memory device coupled to a processor is disclosed. The method comprises determining an error number for a block of the solid-state nonvolatile memory. The error number corresponds to an amount of error bits in a page of the block having a greatest amount of error bits. The method further comprises comparing the error number with an error threshold and determining a reset number indicating an amount of times that the processor has been reset since a previous refresh operation was performed on the block of the solid-state nonvolatile memory. The method further includes comparing the number of resets with a reset threshold and refreshing the block of the solid-state nonvolatile memory when the number of errors exceeds the error threshold and the number of resets exceeds the reset threshold.

Abstract: A method for calculating flow control credits includes determining a number of entries added to each of a pair of storage devices, determining a number of entries removed from each of the storage devices, calculating a difference between available space in the storage devices, and calculating a number of credits to release based on the numbers of entries added to each of the storage devices, on the numbers of entries removed from each of the storage devices, and on the difference in available space. Entries removed from one storage device are treated as an entry added to the other storage device.