When you say you powered it off, was that a safe shutdown or did you just pull the power?
Most file system drivers delay writes, I suspect some variant of your test (if it was unsafe shutdown) could be reproduced on almost any system.
Most file system drivers delay writes, I suspect some variant of your test (if it was unsafe shutdown) could be reproduced on almost any system.
Also raspis do NOT like big fast SD cards with tight tolerances. I've had the best luck with old class 4 cards. Class 10 cards don't last nearly as long with regular power cycling.
The options are the third column in your /etc/fstab file. For example, if you had "errors=remount-ro", you'd change it to "errors=remount-ro,sync".
(Or is the Raspi problem actually in hardware?)