Is there a delay saving files on Tiny 6410?

I edit some file by using vi
And reset board by using reset button or turn off and on.
And then I check file what I changed.
Sometimes it didn`t change.

Maybe I think there is a delay to save.
When reset immediately after save and quit, it didn`t change.
Edit file and relax for a while and reset, it changed.


Explain about this if you know.

Sure. This delay is called "file cache" and improves the write speed in
regular usecases drastically. But a "reset" is never a regular usecase, at
least not, when the system is not down at this moment.

Run the "sync" command after you have written back your changed file. Or -
much better - unmount the filesystem prio reset (or re-mount it read only).

Thanks for answer :)