Data management system, method, apparatus, and device, and controller

A data management method, wherein the data management method is applied to a controller comprised in a data management system, the data management system further comprises a first storage medium and a second storage medium, an access speed of the first storage medium is lower than an access speed of the second storage medium, the second storage medium comprises a first part and a second part, the first part is a cache for the first storage medium, the first storage medium and the second part are not caches, and the data management method comprises:

• obtaining target data that needs to be managed;
• and
• managing the target data by using a target storage medium, wherein the target storage medium is a storage medium, corresponding to the target data, in the first storage medium, the first part, and the second part.

A controller, wherein the controller comprised in a data management system, the data management system further comprises a first storage medium and a second storage medium, an access speed of the first storage medium is lower than an access speed of the second storage medium, the second storage medium comprises a first part and a second part, the first part is a cache for the first storage medium wherein the controller stores a processor and a memory, and the memory stores instructions, by executing the instructions, the processor is configured to:

• obtain target data that needs to be managed;
• and
• manage the target data by using a target storage medium, wherein the target storage medium is a storage medium, corresponding to the target data, in the first storage medium, the first part, and the second part.