Appologies that wasn't how I read your post, no offence intended. In that situation you could write in parallel. I was mainly addressing the "stale" part. Archive data wouldn't get stale because you'd capture all of it so it's just a calculation of cache vs write speed and parallelisation to get the stuff out. All data can be written in parallel one way or another, just a matter of how complex you want to make it. In this instance as has been pointed out all over the thread the medium would probably break anyway so it's all moot :)
