Avoiding data loss after removing NTFS usb without unmounting.

[alivdel]

I have a Hardware with two USB plugs and pfSense on it. I want to configure one of them for FAT32 and another for NTFS.
fstab should be configured in that way that the USBs been mounted automatically.

I added this two lines to the /etc/fstab:

/dev/da1s1  /mnt/usb1 ntfs mountprog=/usr/local/bin/ntfs-3g,rw,noauto,late 0   0        
/dev/da2s1  /mnt/usb2 msdosfs rw,noauto,-m=777,-M=777                      0   0 

Now they will be automatically mounted if I insert proper USB but after removing them there is data loss by NTFS Format USB (FAT32 is ok).
how can i force NTFS usb to be written immidiately.
Can anybody help me to solve this problem? thanks.

[heper]

without unmounting chance of corruption is always there. doesn't matter what filesystem or even what type of operating system.

also: why?

[alivdel]

@heper
yes i know about Chance of corruption, but also want to minimize possibility of data loss if someone forget to unmount the usb.
i searched in the net, there is some options for example "sync", i tried that but same result. All data are lost on NTFS without unmounting.

[JKnott]

@alivdel said in Avoiding data loss after removing NTFS usb without unmounting.:

how can i force NTFS usb to be written immidiately

I believe the sync command should do that. Why do you want both FAT32 and NTFS?

[stephenw10]

Removing a filesystem without unmounting it is always going to be a bad idea.
But more generally, as others have said, why are you doing this on pfSense?

Steve

[alivdel]

@jknott
i tried sync flag, it works on FAT32 but not on NTFS.

[alivdel]

@stephenw10
i want to use usb as DMZ and idea is to download and upload from/on usb.
and as i said i'm aware of problems happen if filesystem is removed without unmounting. it's only to minimize data loss in case that happened.

[Grimson]

@alivdel said in Avoiding data loss after removing NTFS usb without unmounting.:

i want to use usb as DMZ and idea is to download and upload from/on usb.

What? You can put a networking device or VM into a DMZ. You can't use an USB stick as a DMZ.

Also pfSense is a firewall, not a p2p server.

[alivdel]

@grimson
thanks for your extra Information but do you have any idea about my main question?

[stephenw10]

Don't use NTFS maybe?

Not at all clear on what you're doing here though.

Steve