Re: Some questions related PR#1478

[Gregory Nutt]

2. Is there a way to flush a fat file system? Because I think the unexpected 
behaviour I've seen was related to debugging and fat cache flush.
I tried to use fsync on the folder (which was proposed in a linux related 
discussion), but open on a folder returns errno 21 (is a directory).
fsync on any open file descriptor will flush the file system since data 
is only buffered for for metadata and one file at a time.  All syncs's 
are the same for the FAT file system.