it depends what you mean. Pretty much no one cares about sequential speeds (unless you are copying 10s of gb it doesn't matter). OTOH, the latency of random 4k

it depends what you mean. Pretty much no one cares about sequential speeds (unless you are copying 10s of gb it doesn't matter). OTOH, the latency of random 4k reads and writes matters a ton. Any time cached data is read/written (e.g. cookies/ UI settings etc), there are going to be a bunch of tiny disk operations will be performed.