• How do I change the Client Drive Remapping Letter from V to another Letter?

    August 12, 2011

    XenApp

    During the design phase of a XenApp server installation, a common question is whether to remap the server’s drive letters.  If a server has one hard drive partition and one CD-ROM drive the driver letters assigned by Windows are C and D respectively.  The Accidental Citrix Admin may find his users confused when they go to save files when they don’t see their local hard drive as Drive C.  The default behavior for Citrix XenApp is to remap the Client’s drives starting with the letter V.  The client’s local drive C becomes V, drive D becomes U and so on (Figure 1).

    Figure 1

     

    If you need to change the Client Remapped Drive letter from V to something else like Y, there is a simple server registry key to affect the change.

    Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following to view the article in the Microsoft Knowledge Base:

    How to back up and restore the registry in Windows

    On EVERY XenApp server, start Regedit and navigate to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Citrix (Figure 2).

    Figure 2

     

    Right-click in the right pane, select New, String Value (Figure 3).

    Figure 3

     

    A new value is created (Figure 4).

    Figure 4

     

    Name the new value, InitialClientDrive (Figure 5).

    Figure 5

     

    Enter the new client drive letter you want remapping to start with, Y: in this example (Figure 6).

    Figure 6

     

    Your registry key should now look like Figure 7.

    Figure 7

     

    This is an immediate change on the server.  All a logged in user needs to do to see the change is restart the published application they are running.  They will now see the drive letter change (Figure 8).

     

    Figure 8

     

    Remember, this registry change must be made to every XenApp server in the Farm.

    What happens if InitialClientDrive is set to C?  It appears the XenApp server gets confused and the user will not see the server’s drive or any of their local hard drives.  In the example below, all the user sees is the local CD-ROM drive.  Both local hard drive partitions are now missing (Figure 9).

    Figure 9

     

    This was tested using XenApp 5.0 on Server 2003 using Citrix XenApp Plugin for Hosted Apps Client 11.000.

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    About Carl Webster

    Webster is a Sr. Solutions Architect for Choice Solutions, LLC and specializes in Citrix, Active Directory and Technical Documentation. Webster has been working with Citrix products for many years starting with Multi-User OS/2 in 1990.

    View all posts by Carl Webster

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