Microsoft KB Archive/872949

= Multiple drive letters are assigned to a USB device in Windows 2000 =

Article ID: 872949

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Service Pack 4
 * Microsoft Windows 2000 Professional Edition

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SYMPTOMS
A Microsoft Windows 2000-based computer may incorrectly assign multiple drive letters to a universal serial bus (USB) device when you attach the device to the computer.

Note This problem typically occurs after you apply the hotfix that is described in Microsoft Knowledge Base article 832097, or after you apply the security update for Microsoft Windows that is described in Microsoft Knowledge Base article 835732.



CAUSE
Some original equipment manufacturers (OEMs) of removable media storage devices might want to hide the drive volume of a USB device and then reveal the drive volume later.

This problem occurs if the manufacturer of the USB device uses the IOCTL_MOUNTMGR_VOLUME_ARRIVAL_NOTIFICATION Input Output Control (IOCTL) to reveal the drive volume.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Restart requirement
You must restart your computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.    Date         Time   Version            Size    File name --  13-Aug-2004  17:20  5.0.2195.6968      30,384  Mountmgr.sys



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For additional information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:

816915 New file naming schema for Microsoft Windows software update packages

For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbtshoot kbbug kbfix kbwin2000presp5fix kbhotfixserver kbqfe KB872949

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