cat /usr/share/PolicyKit/policy/hal-storage.policy
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE policyconfig PUBLIC
 "-//freedesktop//DTD PolicyKit Policy Configuration 1.0//EN"
 "http://www.freedesktop.org/standards/PolicyKit/1.0/policyconfig.dtd">

<!-- 
Policy definitions for HAL's drives/media mechanims.

Copyright (c) 2007 David Zeuthen <david@fubar.dk>

HAL is licensed to you under your choice of the the Academic Free
License Version 2.1, or the GNU General Public License version 2. Some
individual source files may be under the GPL only. See COPYING for
details.
-->

<policyconfig>

  <action id="org.freedesktop.hal.storage.mount-fixed">
    <description>Mount file systems from internal drives.</description>
    <message>System policy prevents mounting internal media</message>
    <defaults>
      <allow_inactive>no</allow_inactive>
      <allow_active>auth_admin_keep_always</allow_active>
    </defaults>
  </action>
  
  <action id="org.freedesktop.hal.storage.mount-removable">
    <description>Mount file systems from removable drives.</description>
    <message>System policy prevents mounting removable media</message>
    <defaults>
      <allow_inactive>no</allow_inactive>
      <allow_active>yes</allow_active>
    </defaults>
  </action>
  
  <action id="org.freedesktop.hal.storage.unmount-others">
    <description>Unmount file systems mounted by other users.</description>
    <message>System policy prevents unmounting media mounted by other users</message>
    <defaults>
      <allow_inactive>no</allow_inactive>
      <allow_active>auth_admin_keep_always</allow_active>
    </defaults>
  </action>
  
  <action id="org.freedesktop.hal.storage.eject">
    <description>Eject removable media.</description>
    <message>System policy prevents ejecting removable media</message>
    <defaults>
      <allow_inactive>no</allow_inactive>
      <allow_active>yes</allow_active>
    </defaults>
  </action>
  
  <action id="org.freedesktop.hal.storage.crypto-setup-fixed">
    <description>Set up decryption for encrypted storage devices.</description>
    <message>System policy prevents accessing encrypted fixed media</message>
    <defaults>
      <allow_inactive>no</allow_inactive>
      <allow_active>auth_admin_keep_always</allow_active>
    </defaults>
  </action>

  <action id="org.freedesktop.hal.storage.crypto-setup-removable">
    <description>Set up decryption for encrypted storage devices.</description>
    <message>System policy prevents accessing encrypted removable media</message>
    <defaults>
      <allow_inactive>no</allow_inactive>
      <allow_active>yes</allow_active>
    </defaults>
  </action>

</policyconfig>

/usr/bin/gnome-mount -t --verbose --hal-udi=/org/freedesktop/Hal/devices/volume_uuid_2CA9_652C
gnome-mount 0.7
** (gnome-mount:31317): DEBUG: Mounting /org/freedesktop/Hal/devices/volume_uuid_2CA9_652C
** (gnome-mount:31317): DEBUG: read default option 'shortname=lower' from gconf strlist key /system/storage/default_options/vfat/mount_options
** (gnome-mount:31317): DEBUG: read default option 'uid=' from gconf strlist key /system/storage/default_options/vfat/mount_options
** (gnome-mount:31317): DEBUG: Mounting /org/freedesktop/Hal/devices/volume_uuid_2CA9_652C with mount_point='DONNEES', fstype='', num_options=2
** (gnome-mount:31317): DEBUG:   option='shortname=lower'
** (gnome-mount:31317): DEBUG:   option='uid=500'

** (gnome-mount:31317): WARNING **: Mount failed for /org/freedesktop/Hal/devices/volume_uuid_2CA9_652C
org.freedesktop.Hal.Device.PermissionDeniedByPolicy : org.freedesktop.hal.storage.mount-removable no <-- (action, result)

/usr/bin/gnome-mount --display-settings --hal-udi=/org/freedesktop/Hal/devices/volume_uuid_2CA9_652C
gnome-mount 0.7
Displaying settings for volume (overrides drive settings)
hal udi:      /org/freedesktop/Hal/devices/volume_uuid_2CA9_652C
There are no settings; you can use --write-settings

lshal -lu /org/freedesktop/Hal/devices/volume_uuid_2CA9_652C
udi = '/org/freedesktop/Hal/devices/volume_uuid_2CA9_652C'
  block.device = '/dev/sdc1'  (string)
  block.is_volume = true  (bool)
  block.major = 8  (0x8)  (int)
  block.minor = 33  (0x21)  (int)
  block.storage_device = '/org/freedesktop/Hal/devices/storage_serial_USB_DISK_FREEDIK_LWFORMAT_2005022614555102_0_0'  (string)
  info.capabilities = {'volume', 'block'} (string list)
  info.category = 'volume'  (string)
  info.interfaces = {'org.freedesktop.Hal.Device.Volume'} (string list)
  info.parent = '/org/freedesktop/Hal/devices/storage_serial_USB_DISK_FREEDIK_LWFORMAT_2005022614555102_0_0'  (string)
  info.product = 'DONNEES'  (string)
  info.udi = '/org/freedesktop/Hal/devices/volume_uuid_2CA9_652C'  (string)
  linux.hotplug_type = 3  (0x3)  (int)
  linux.sysfs_path = '/sys/block/sdc/sdc1'  (string)
  org.freedesktop.Hal.Device.Volume.method_argnames = {'mount_point fstype extra_options', 'extra_options', 'extra_options'} (string list)
  org.freedesktop.Hal.Device.Volume.method_execpaths = {'hal-storage-mount', 'hal-storage-unmount', 'hal-storage-eject'} (string list)
  org.freedesktop.Hal.Device.Volume.method_names = {'Mount', 'Unmount', 'Eject'} (string list)
  org.freedesktop.Hal.Device.Volume.method_signatures = {'ssas', 'as', 'as'} (string list)
  storage.model = ''  (string)
  volume.block_size = 512  (0x200)  (int)
  volume.fstype = 'vfat'  (string)
  volume.fsusage = 'filesystem'  (string)
  volume.fsversion = 'FAT16'  (string)
  volume.ignore = false  (bool)
  volume.is_disc = false  (bool)
  volume.is_mounted = false  (bool)
  volume.is_mounted_read_only = false  (bool)
  volume.is_partition = true  (bool)
  volume.label = 'DONNEES'  (string)
  volume.linux.is_device_mapper = false  (bool)
  volume.mount.valid_options = {'ro', 'sync', 'dirsync', 'noatime', 'nodiratime', 'noexec', 'quiet', 'remount', 'exec', 'utf8', 'shortname=', 'codepage=', 'iocharset=', 'umask=', 'dmask=', 'fmask=', 'uid=', 'flush'} (string list)
  volume.mount_point = ''  (string)
  volume.num_blocks = 130336  (0x1fd20)  (int)
  volume.partition.flags = {} (string list)
  volume.partition.label = ''  (string)
  volume.partition.media_size = 66764800  (0x3fac000)  (uint64)
  volume.partition.number = 1  (0x1)  (int)
  volume.partition.scheme = 'mbr'  (string)
  volume.partition.start = 32256  (0x7e00)  (uint64)
  volume.partition.type = '0x04'  (string)
  volume.partition.uuid = ''  (string)
  volume.size = 66732032  (0x3fa4000)  (uint64)
  volume.unmount.valid_options = {'lazy'} (string list)
  volume.uuid = '2CA9-652C'  (string)