Abstract: Methods and systems are disclosed herein for detecting problems related to copyback programming. After the copyback data is read into the internal flash buffer, a part of the copyback data stored in the internal flash buffer (such as spare data) is analyzed to determine whether there are any errors in a part of the copyback data read. The analysis may be used by the flash memory in one or more ways related to the current copyback operation, subsequent copyback operations, subsequent treatment of the data in the current copyback operation, and subsequent treatment of the section in memory associated with the source page.

Abstract: Methods and systems are disclosed for protecting metadata from NAND flash failures. With data striped across multiple flash memory chips, the flash memory multiple chips may store multiple copies of metadata (and potentially ECC). The metadata stored in the multiple copies on the flash memory chips may be different from one another. For example, on a particular chip, a first copy of metadata is stored and a second copy of metadata is stored, with the second copy being a redundant copy of the metadata stored on a different chip. In this way, if one of the chips fails, a copy of the failed chips metadata is stored on another of the chips, and may be accessed.

Abstract: Methods and systems are disclosed herein for detecting problems related to copyback programming. After the copyback data is read into the internal flash buffer, a part of the copyback data stored in the internal flash buffer (such as spare data) is analyzed to determine whether there are any errors in a part of the copyback data read. The analysis may be used by the flash memory in one or more ways related to the current copyback operation, subsequent copyback operations, subsequent treatment of the data in the current copyback operation, and subsequent treatment of the section in memory associated with the source page.