I think this is referring to write-back caching, where the write operation is confirmed when the cache accepts it, but a separate process is responsible for rep

I think this is referring to write-back caching, where the write operation is confirmed when the cache accepts it, but a separate process is responsible for replicating the write operation from cache to the persistent storage. Write-through is more widely accepted, since the operation is not confirmed until it's successful on both the cache and the persistent storage.