diff --git a/ptxdist/local_src/eag_usbmount/root/etc/usbmount/usbmount.conf b/ptxdist/local_src/eag_usbmount/root/etc/usbmount/usbmount.conf
index 20e9cf5..bb70433 100644
--- a/ptxdist/local_src/eag_usbmount/root/etc/usbmount/usbmount.conf
+++ b/ptxdist/local_src/eag_usbmount/root/etc/usbmount/usbmount.conf
@@ -25,9 +25,11 @@ FILESYSTEMS="vfat ext2 ext3 ext4 hfsplus"
 # experience data loss.                                                     #
 #############################################################################
 # Mount options: Options passed to the mount command with the -o flag.
-# See the warning above regarding removing "sync" from the options, as
-# it may lead to data loss.
-MOUNTOPTIONS="sync,noexec,nodev,noatime,nodiratime"
+
+# JNCG/Quantron: Mount USB-Stick read-only by default, use
+# /sbin/eag_usbstick to make it writeable, write stuff, and then
+# make it read-only again to prevent stick data corruption
+MOUNTOPTIONS="ro,async,noexec,nodev,noatime,nodiratime"
 
 # Filesystem type specific mount options: This variable contains a space
 # separated list of strings, each which the form "-fstype=TYPE,OPTIONS".
diff --git a/ptxdist/local_src/eag_usbmount/root/sbin/eag_usbstick b/ptxdist/local_src/eag_usbmount/root/sbin/eag_usbstick
new file mode 100755
index 0000000..9eb1213
--- /dev/null
+++ b/ptxdist/local_src/eag_usbmount/root/sbin/eag_usbstick
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+#
+# EAG USBStick - Manage USB Stick status for JNCG and Quantron
+#
+
+export PATH='/sbin:/bin'
+
+typeset -r usbfsmountpoint='/media/usb0'
+typeset -r cmd="$1"
+
+# use POSIX shell tracing to log trace to journalctl
+# (observe with $ journalctl -f -a #)
+set -o xtrace
+
+case "${cmd}" in
+	'mount_writeable')
+		mount -o rw,remount "${usbfsmountpoint}"
+		exit $?
+		;;
+	'mount_readonly')
+		# remounting as read-only implicitly writes all
+		# pending write buffers to the media before making
+		# the mount point as read-only
+		mount -o ro,remount "${usbfsmountpoint}"
+		exit $?
+		;;
+	'is_stick_mounted_writeable')
+		grep -q -E \
+			'[[:space:]]+'"${usbfsmountpoint}"'[[:space:]]+(fat|vfat)[[:space:]]+rw,' \
+			'/proc/self/mounts'
+		exit $?
+		;;
+	*)
+		exit 1
+		;;
+esac
+# EOF.
diff --git a/ptxdist/local_src/ecu01-codesys/QAX/QAX.c b/ptxdist/local_src/ecu01-codesys/QAX/QAX.c
index 79b1495..b77e090 100755
--- a/ptxdist/local_src/ecu01-codesys/QAX/QAX.c
+++ b/ptxdist/local_src/ecu01-codesys/QAX/QAX.c
@@ -524,83 +524,44 @@ void CDECL CDECL_EXT usbstick_getmountpath(usbstick_getmountpath_struct *p)
 /*****************************************************/

 void CDECL CDECL_EXT usbstick_mount(usbstick_mount_struct *p)

 {

-    /* mount -o bind /mnt/test /mnt/usbstick

-     * Beide Ordner müssen existieren.

-     * ändert man nun was in /mnt/usbstick ändert man auch in /mnt/test.

-     * umount /mnt/usbstick

-     * /mnt/usbstick ist leer, /mnt/test ist verändert. */

-

-    int iRet;

-

-    /*********************************************/

-    /* Mount fuer Usbstick auf Media ausfuehren */

-    /*********************************************/

-    iRet = mount( "", acSettgUSBStickMountOrgPoint, "", MS_REMOUNT, "" );

-    if ( iRet != 0 )

-    {

-        p->USBStick_Mount = -1;

-        //No USB-Mount cancel,

-        return;

-    }

-

-    iRet = mount( acSettgUSBStickMountOrgPoint, acSettgUSBStickMountPoint, "", MS_BIND, "" );

-    if ( iRet == 0 ) {

-

-        /* Mountvorgang war erfolgleich */

-        //Log_Warning(COMPONENT_ID,"USB-Stick Device(%i) %s gemoutet\n", i, acSettgUSBStickDevice[i]);

-        p->USBStick_Mount = 0;

-        return;

-    }

-

-

-    /* Mountvorgang war nicht erfolgleich */

-    //Log_Warning(COMPONENT_ID,"Mountvorgang fehlgeschlagen\n");

-    p->USBStick_Mount = -1;

+	int ret;

+	ret = system("/sbin/eag_usbstick mount_writeable");

+	if (ret == -1)

+	{

+		perror("/sbin/eag_usbstick mount_writeable failed.");

+		p->USBStick_Mount = -1;

+		return;

+	}

 

+	p->USBStick_Mount = (ret == 0)?0:-1;

 }  /* eofn: usbstick_mount */

 

 void CDECL CDECL_EXT usbstick_umount(usbstick_umount_struct *p)

 {

+	int ret;

+	ret = system("/sbin/eag_usbstick mount_readonly");

+	if (ret == -1)

+	{

+		perror("/sbin/eag_usbstick mount_readonly failed.");

+		p->USBStick_Umount = -1;

+		return;

+	}

 

-    int iRet;

-

-    //Log_Warning(COMPONENT_ID,"usbstick_umount\n");

-    /************************************/

-    /* Unmount fuer Usbstick ausfuehren */

-    /************************************/

-    iRet = umount2( acSettgUSBStickMountPoint, MNT_DETACH );

-    if ( iRet != 0 ) {

-

-        /* Fehler beim Unmount */

-        p->USBStick_Umount = -1;

-        return;

-    }

-

-    /* Umount erfolgreich */

-    p->USBStick_Umount = 0;

-

-

+	p->USBStick_Umount = (ret == 0)?0:-1;

 }  /* eofn: usbstick_umount */

 

 void CDECL CDECL_EXT usbstick_status(usbstick_status_struct *p)

 {

+	int ret;

+	ret = system("/sbin/eag_usbstick is_stick_mounted_writeable");

+	if (ret == -1)

+	{

+		perror("/sbin/eag_usbstick is_stick_mounted_writeable failed.");

+		p->USBStick_Status = -1;

+		return;

+	}

 

-    int iRet;

-

-    /*******************************************************************************/

-    /* Remout mit gleichen Parameter auf Moutpoint ausfuehren um Status abzufragen */

-    /*******************************************************************************/

-    iRet = mount( "", acSettgUSBStickMountPoint, "", MS_REMOUNT | MS_BIND, "" );

-    if ( iRet != 0 ) {

-

-        /* Usbstick ist nicht gemountet */

-        p->USBStick_Status = -1;

-        return;

-    }

-

-    /* Usbstick ist bereits gemountet */

-    p->USBStick_Status = 0;

-

+	p->USBStick_Status = (ret == 0)?0:-1;

 }  /* eofn: usbstick_status */

 

 /*****************************************/

diff --git a/ptxdist/rules/usbmount.make b/ptxdist/rules/usbmount.make
index c7383b7..dce2d7a 100644
--- a/ptxdist/rules/usbmount.make
+++ b/ptxdist/rules/usbmount.make
@@ -125,6 +125,7 @@ endif
 
 	#/sbin
 	@$(call install_copy, usbmount, 0, 0, 0755, $(USBMOUNT_DIR)/root/sbin/udev-trigger-massstorage.sh, /sbin/udev-trigger-massstorage.sh)
+	@$(call install_copy, usbmount, 0, 0, 0755, $(USBMOUNT_DIR)/root/sbin/eag_usbstick, /sbin/eag_usbstick)
 
 	#/systemd unitfiles
 ifdef PTXCONF_USBMOUNT_SYSTEMD_UNIT