Mapping USB Storage Media into RDP Sessions

How to configure USB Storage mapping so that users can access USB storage media attached to the IGEL LX Client within RDP sessions?

Solution

The mapping of USB storage devices is possible for "usb mass storage class" devices. The storage of smartphones and digital cameras is usually accessed via the MTP protocol. Mobile device access via MTP is available with IGEL Linux 10.04.100 or higher; for more information see the how-to Using Mobile Device Access.

Basic Configuration of the Client

setup_usb_storage_hotplug


Within the IGEL Setup or an UMS profile you basically need to configure these parameters:

Activate Devices > Storage Devices > USB Storage-Hotplug > Enable dynamic client drive mapping. This option activates dynamic client drive mapping, a new feature as of IGEL Linux 5.06.100. It automatically recognizes new storage media as they are connected to the thin client. The thin client beeps and shows a notification while it mounts the new device. The storage devices automatically become usable on the thin client and in Citrix ICA Sessions.


This makes the following settings relevant only to session types without dynamic client drive mapping.


Mounted devices need to be unmounted before they are removed to ensure data integrity. This can be done via the Disk Utility, the new Safely Remove Hardware Tool or a tray icon.


  • If the option Private drive letter for each USB storage drive is active a separate drive is shown for each USB storage device in the session:
    Devices > Storage Devices > USB Storage-Hotplug > Private drive letter for each USB storage drive
  • Number of drives  sets the value to the number of USB drives that should be usable simultaneously. Be aware that flash card readers with multiple slots are recognized like several USB Sticks, even if only one flash card is inserted. The mapped drives are shown in the session with "drive letter on terminal name", e.g. "A on IGEL-123456789". 
  • If the option Private drive letter for each USB storage drive is disabled, only one mapped drive is shown in the session. In this drive the contents of each USB storage device will be shown within a folder carrying the name of the respective drive label as soon as the medium is plugged in.
  • Under Start USB storage drives with the drive letter you define with which letter of the alphabet the drive mapping scheme starts.

Additional Parameters to Check

The following parameters are set by default, thus storage mapping will work, but maybe for some reason you have changed these and need to adjust them to allow the storage mapping:

  • Devices > USB access control > Enable (remove checkmark)
  • Sessions > RDP > RDP Global > Mapping > Drive Mapping > Enable Drive mapping (set checkmark)
  • Sessions > RDP > RDP Global > Native USB Redirection > Enable Native USB redirection (remove checkmark)
  • Sessions > RDP > RDP Global > Fabulatech USB Redirection > Enable Fabulatech USB redirection (remove checkmark)
  • Sessions > RDP > RDP Sessions > [session name] > USB Redirection > Enable Native USB Redirection (global setting)
  • Sessions > RDP > RDP Sessions > [session name] > Mapping > Enable Drive Mapping (global setting)

Assigning a Drive Letter within the Session (Optional)

In case you not only want to see the drive in the session as e.g. "A on IGEL-123456789", but want to address the drive with a real drive letter within the session, you may run one of these commands:
subst T: \\tsclient\t
or
net use T: \\tsclient\t

In this example "T on IGEL-123456789" is assigned to drive letter T: within the session. You may also assign the mapped drive to another drive letter than is used in its name.

Configuration on the Server Side

On the server side, e.g. with Windows Server 2008R2, a user in the group "Users" with access to the terminal server will have the mapping default. This is true for a newly installed server. But the mapping can be prevented by changing the policies:

Do not allow drive redirection Specifies whether to prevent the mapping of client drives in a Remote Desktop Services session (drive redirection). By default, an RD Session Host server maps client drives automatically upon connection. Mapped drives appear in the session folder tree in Windows Explorer or Computer in the format [driveletter] on [computername]. You can use this setting to override this behavior." Source: https://technet.microsoft.com/de-de/library/ee791794%28v=ws.10%29.aspx
Last update: May 6, 2019