On Wed, Jul 10, 2019 at 3:26 PM Lassi Kortela <xxxxxx@lassi.io> wrote:
1) Be content with the 30-second auto-sync like everyone else. 

It's not clear to me that the 30-second auto-sync is reliable, either.  I can't find it right now, but I read an ACM paper a few years ago that compared several filesystems and showed that they had widely varying behavior with respect to unplanned shutdown.  Varying the hardware makes reliable behavior even less likely.  I don't think waiting thirty seconds will fix that.