Back in the days of spinning rust, we had RAID controller cards with batteries, so that if someone pulled the plug, there would be enough power to keep the drives going until any buffered writes were completed.

I certainly wouldn't mind if modern servers had something similar to make sure programs could stop gracefully. But then that doesn't help if you have a hardware failure...

Apparently, Windows does have precisely that, Flush­File­Buffers [0][1]. The analogue in the Unix world is fsync(). Of course, some hard drives lie about actually having written their caches down, in which case there is nothing much anyone can do.

[0] https://learn.microsoft.com/en-us/windows/win32/api/fileapi/...

[1] https://devblogs.microsoft.com/oldnewthing/20170510-00/?p=95...