Method for A Storage Device Processing Data and Storage Device

A storage device, comprising:

• a processor;
• a communication interface;
• and
• a communication bus;
• wherein the processor is configured to:
• communicate with the communication interface through the communication bus;
• obtain an access frequency of a block of a second storage set, wherein the second storage set includes a plurality of storage disks with low performance;
• determine that the access frequency of the block achieves a first access threshold value;
• move the block to a first storage disk set based upon the determination that the access frequency of the block achieves the first access threshold value, wherein the first storage disk set includes a plurality of storage disks with high performance;
• obtain an access frequency of each of a plurality of sub-blocks into which the block is divided;
• determine that an access frequency of at least one of the sub-blocks is less than a second access threshold value;
• and
• move the determined sub-block back to the second storage disk set based upon the determination that the access frequency of the at least one of the sub-blocks is less than the second access threshold value.