Problems may occur when you try to transfer files to or from a device that is connected to a USB 2.0 hub in Microsoft Windows XP (908673)


The information in this article applies to:

  • Microsoft Windows XP Home Edition
  • Microsoft Windows XP Professional

SYMPTOMS

You may experience one or more of the following symptoms when you try to transfer files to or from a device that is connected to a universal serial bus (USB) 2.0 hub in Microsoft Windows XP:
  • When you try to transfer files, the file transfer fails. You may receive an error message about a delayed write failure. The error message that you receive may vary, depending on the device that you are using.
  • Other USB devices that are connected to the USB 2.0 hub may stop working. You may receive notification that the USB devices have been disconnected or reconnected.
  • Power may be disabled on USB devices. Then, the devices are reenumerated.
  • A USB keyboard may stop working correctly. For example, the behavior of keys may be irregular. When you press a key, the key entry may be repeated many times. Alternatively, when you press a key, nothing may occur at all.
Note Some computers have an internal USB 2.0 hub. For example, a portable computer may have a single USB bus and may use an internal USB hub to provide two or more available USB ports on the computer. Therefore, this issue may occur if the device is connected directly to a USB port on the computer. This issue may also occur if the device is internal and is connected internally to the internal USB 2.0 hub. For example, this problem might occur if you use a portable computer that has an internal Bluetooth radio that is connected to an internal USB 2.0 hub. When you use this Bluetooth device to transfer the files to another device, you may experience the symptoms that are described in the "Symptoms" section.

CAUSE

This problem may occur when there is lots of traffic on the USB 2.0 hub, and you transfer files to a low-speed or a full-speed USB device. The problem does not occur when you transfer files to a high-speed USB device.

For more information about USB 2.0 data transfer rates, see the "More Information" section.

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows XP service pack that contains this hotfix.

To resolve this problem immediately, 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.

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.
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Usbehci.sys5.1.2600.278327,26425-Oct-200523:39x86SP2SP2QFE
Usbport.sys5.1.2600.2783143,10425-Oct-200523:39x86SP2SP2QFE

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

Data transfer rates that USB 2.0 supports

USB 2.0 supports the following maximum data transfer rates, depending on the amount of bus bandwidth that a device requires:
  • 1.5 megabits per second (Mbps) for low-speed devices that do not require lots of bandwidth. These devices include mouse devices and keyboards.
  • 12 Mbps for full-speed, higher-performing devices. These devices include storage devices, speakers, scanners, and video cameras.
  • 480 Mbps for high-speed devices. These devices include mass storage devices and Hi-Speed CD or DVD recorders.
For more 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

Modification Type:MinorLast Reviewed:6/2/2006
Keywords:kbExpertiseBeginner kbQFE kbHotfixServer KB908673 kbAudEndUser
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