Operation method of controller, controller, and memory system

Abstract

In an example operation method of a controller, a mapping relationship of translation from a first physical block address into a first logical block address is written to a first entry according to a write instruction. The first physical block address is a storage address in a memory, and the first logical block address is a storage address recorded in the write instruction. Storage data is written to the first physical block address. A mapping relationship of translation from the first logical block address into the first physical block address is written to a second entry. When a product of first time and second time is greater than or equal to a first value, the second entry is updated into the memory, wherein the first time is theoretical time for refreshing the first entry, and the second time is theoretical time for refreshing the second entry.