A method of storing write data in flash memory incorporated in a storage device, the method includes; receiving write data and a logical block address (LBA) for the flash memory, determining whether the LBA exists in the cache memory, if the LBA exists in the cache memory, comparing the write data with cache data stored in the cache memory at a location associated with the LBA, and if the write data and the cache data are the same, terminating operation of the storage device without programming the write data to the flash memory, else updating an error detection information lookup table entry associated with the LBA and programming the write data to the flash memory, and if the LBA does not exist in the cache memory, updating the error detection information lookup table entry associated with the LBA and programming the write data to the flash memory.