[lia323]

The end goal of the NoWA write pattern is conceptually similar to what you described, in the sense that NoWA tries to increase the chance that data becomes invalid together inside the SSD, which is also what mechanisms such as TRIM try to facilitate. The NoWA pattern is more about proactively aligning the application-level GC behavior with the SSD’s internal GC behavior, such that the SSD has little or no valid-page movement left to do internally.