From mboxrd@z Thu Jan  1 00:00:00 1970
From: lroluk@gmail.com (luca ellero)
Date: Thu, 21 Apr 2011 11:41:33 +0200
Subject: VFAT: flush mount option
Message-ID: <4DAFFBCD.9030503@gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

Hi all,
I've read somewhere that the suggested mount option for USB key with FAT 
filesystem is "-o flush" instead of "-o sync" (if you want to remove the 
key safely, without executing umount or sync). sync option is quite 
dangerous (and slow) for flash file-systems since it does an aggressive 
flushing on the FAT, which can damage the flash.
Anyway with flush option (kernel 2.6.32), I experienced the following:
- if I create or modify a file on the key, the fs is sync'ed immediately 
so I can pull out the key immediately with no side effects
- but if I only create a directory and anything else, the "flush" is not 
executed immediately, so if I pull out the key, the directory just 
created disappear (which is not what I would expect).
Can someone please tell me if this is the right behaviour or am I 
missing something.
Thanks
Best regards
Luca Ellero