HAL won't mount USB storage with "flush" option.

Question

Trying to mount a 8G vfat USB stick automatically with HAL that using "flush" option to decrease the flushing time when unmounting it.
And I've consulted the wiki HAL entry and wrote this:
<match key="block.is_volume" bool="true">
<match key="@block.storage_device:storage.hotpluggable" bool="true">
<merge key="volume.policy.mount_option.flush" type="bool">true</merge>
</match>
<match key="@block.storage_device:storage.removable" bool="true">
<merge key="volume.policy.mount_option.flush" type="bool">true</merge>
</match>
</match>
put it in /usr/PolicyKit/PolicyKit.conf, and restart HAL.
But it's still not working. Can anyone tell me where I do wrong?

Answer 1

ok, thank you.
I've been putting my setting into /etc/hal/fdi/policy/20-usbvfat.fdi
Here's its content:
<?xml version="1.0" encoding="UTF-8"?>
<deviceinfo version="0.2">
<device>
<!--<merge key="volume.ignore" type="bool">false</merge>-->
<match key="volume.fstype" string="vfat">
<merge key="volume.policy.mount_option.utf8" type="bool">true</merge>
</match>
<match key="storage.hotpluggable" bool="true">
<merge key="volume.policy.mount_option.flush" type="bool">true</merge>
</match>
<match key="storage.removable" bool="true">
<merge key="volume.policy.mount_option.flush" type="bool">true</merge>
</match>
<match key="@block.storage_device:storage.hotpluggable" bool="true">
<merge key="volume.policy.mount_option.flush" type="bool">true</merge>
</match>
<match key="@block.storage_device:storage.removable" bool="true">
<merge key="volume.policy.mount_option.flush" type="bool">true</merge>
</match>
</device>
</deviceinfo>
(with every possible syntaxs i can find)
The fact is that I've tried putting them under /etc/hal/... and /usr/share/hal...
But none of them really work, I doubt if HAL is really reading this file or it has changed its variable names (idk...)