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

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Article ID: 872949 - View products that this article applies to.
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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.

RESOLUTION

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

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 "Applies to" 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

Properties

Article ID: 872949 - Last Review: October 26, 2006 - Revision: 2.5
APPLIES TO
  • Microsoft Windows 2000 Advanced Server SP4
  • Microsoft Windows 2000 Service Pack 4
  • Microsoft Windows 2000 Professional Edition
Keywords: 
kbautohotfix kbtshoot kbbug kbfix kbwin2000presp5fix kbhotfixserver kbqfe KB872949

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