System Garbage Collection Method and Garbage Collection Method on Solid State Disk

摘要

A method for system garbage collection and a method for garbage collection on solid state disks are provided. The system controller determines the first logical chunk group to be collected, where the first logical chunk group contains the first data logical chunk and the first data logical chunk is a plurality of solid state disks. Positioned in the first solid-state disk of, valid data is stored in the first logical address in the first logical chunk group, and valid data is stored in multiple solid-state disks with the real address and the first logic. There is a correspondence with the address. The system controller creates a second logical chunk group, where at least one second data logical chunk in the second logical chunk group is a solid in which the first data logical chunk that stores valid data is located. Distributed on the state disk, which ensures that valid data is migrated from the first logical chunk group to the second logical chunk group, but the real address of the valid data remains unchanged and it Reduces the number of light amplifications.