JFFS2 on NAND and when is file on media?

[Joakim Tjernlund]

I have been using JFFS2 for many years on NOR flash but never on NAND.
I wonder if NAND has the same guaranties as NOR as to when one
can expect file contents to be safely on media so one can pull the power
without loss of data?
Is the the whole file safe once close(2) returns? If not, what do
I have to do flush all outstanding data to media?

 Jocke