Method of collecting garbage blocks in a solid state drive

摘要

A method of collecting garbage blocks in a solid state drive includes collecting a garbage block of a multiple level cell flash memory, selecting a spare block as a target block, copying effective data of the garbage block to a physical cell of the target block, searching for unprogrammed physical pages of the physical cell of the target block, using dummy data to complete programming of the unprogrammed physical pages of the physical cell, deleting the effective data in the garbage block, and recycling the garbage block to be a new spare block.

主权项

1. A method of collecting garbage blocks in a solid state drive, comprising:
collecting a garbage block of a data area of a multiple level cell flash memory; selecting a spare block of the multiple level cell flash memory as a target block; copying effective data of the garbage block and programming the effective data to physical pages of a physical cell of the target block; searching for unprogrammed physical pages of the physical cell of the target block; completing programming of the physical cell by programming the unprogrammed physical pages of the physical cell with dummy data; deleting the effective data in the garbage block; and recycling the garbage block to be anew spare block of a spare area of the multiple level cell flash memory.