CONTROLLER, FLASH MEMORY DEVICE, METHOD FOR IDENTIFYING DATA BLOCK STABILITY AND METHOD FOR STORING DATA ON FLASH MEMORY DEVICE

摘要

Embodiments of the present invention provide a controller, including a processor, a cache, and a communications interface, where: the controller is configured to read information about a first data block from the cache; determine a stability level of the first data block according to a reference count of the first data block, a length of a period of time when the first data block is stored in a flash memory apparatus, and a mapping relationship among a reference count of a data block, a length of a period of time when the data block is stored in a flash memory apparatus, and a stability level, where the stability level is used to indicate stability of the data block; and send a logical address of the first data block and the stability level of the first data block to the flash memory apparatus through the communications interface, so that the flash memory apparatus stores data blocks having a same stability level together.