Storage controller, storage control method, solid state disk and storage system

The invention discloses a storage controller, a storage control method, a solid state disk and a storage system. The storage controller comprises a processor, a first interface and a memory, wherein the first interface and the memory are respectively coupled to the processor. The first interface is used for receiving a data writing instruction, and the data writing instruction is used for requesting to write target data into the first logic address. And the processor is used for reading a hotspot attribute corresponding to the first logic address from the memory, and when the hotspot attribute indicates that the first logic address is a hotspot address, the processor is also used for storing the target data to a first area of the memory. Wherein the first area is used for replacing a storage space, corresponding to the hot spot address, in the flash memory controlled by the storage controller to store data. The storage controller avoids frequent writing of some extremely small LBA areas so as to ensure that the service life of the solid state disk is not affected, meanwhile, participation of a host side is not needed, the host side does not need to be adapted, and therefore the coupling degree of the host and the solid state disk can be greatly reduced.