METHOD FOR OPERATING MEMORY CONTROLLER AND SYSTEM HAVING THE MEMORY CONTROLLER

摘要

Disclosed is a method for operating a memory controller. The method for operating the memory controller includes the steps of: determining the number of free blocks to be generated for idle time by using a block consumption history; and controlling a nonvolatile memory device to perform a garbage collection operation for the idle time for generating the free blocks corresponding to the determined number of the free blocks. [Reference numerals] (S10) Determining the number of free blocks; (S100) Determining the number of effective pages to be copy-back; (S110) Performing a garbage collection operation; (S120) Performing a write operation corresponding to a third write request; (S20) Performing the garbage collection operation for idle time; (S30) Receiving a first write request and a second write request; (S40) Performing the write operation by responding to the first write request; (S50) Remaining number of free blocks> Number of threshold free blocks?; (S60) Generating one new free block; (S70) Performing the write operation corresponding to the second write request; (S80) Receiving the third write request; (S90) Garbage collection operation is completed for the idle time?