I think that @dcarosone is asking about creating a file in the pool to force
zfs to write to most of the pool (not dd-ing to the raw disk). That could work
but the `zpool initialize` approach has a few advantages:
- You don't need to figure out how big to make the file. The file size can't
You could go through and `dd` to every disk before adding it to the pool and
that is the common practice used by many. The problem that this is trying to
solve is to be able to avoid the delay of having to wait for every disk to be
pre-warmed before using it. Also, people often forget to "warm"
