The Microsoft Storport driver (Storport.sys) is installed on a computer that is running Windows Server 2008 or Windows Vista. Then, you notice that the value of the DeviceType registry entry for storage devices is truncated to half of its length.

Note The DeviceType registry entry is located under the following registry subkey:For example, the value of the DeviceType registry entry may be truncated to "MediumChang" when the registry entry that is expected is "MediumChangerPeripheral."

Therefore, applications may function incorrectly when they retrieve the device type information from the DeviceType registry entry.

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This problem occurs because the Storport.sys driver incorrectly calculates the string size of the DeviceType registry entry.

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Hotfix information

Windows Server 2008

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. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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: 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.

Prerequisites

No prerequisites are required.

Restart requirement

You must restart the 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 item in Control Panel.

Windows Server 2008, 32-bit versions

File name	File version	File size	Date	Time	Platform
Storport.sys	6.0.6001.22190	123,960	30-May-2008	05:58	x86

Windows Server 2008, Itanium-based versions

File name	File version	File size	Date	Time	Platform
Storport.sys	6.0.6001.22190	377,912	30-May-2008	06:25	IA-64

Windows Server 2008, 64-bit versions

File name	File version	File size	Date	Time	Platform
Storport.sys	6.0.6001.22190	162,872	30-May-2008	06:42	x64

Windows Vista

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. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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: 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.

Prerequisites

No prerequisites are required.

Restart requirement

You must restart the 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 item in Control Panel.

Windows Vista, 32-bit versions

File name	File version	File size	Date	Time	Platform
Storport.sys	6.0.6000.20845	120,376	30-May-2008	05:51	x86

Windows Vista with Service Pack 1, 32-bit versions

File name	File version	File size	Date	Time	Platform
Storport.sys	6.0.6001.22190	123,960	30-May-2008	05:58	x86

Windows Vista, 64-bit versions

File name	File version	File size	Date	Time	Platform
Storport.sys	6.0.6000.20845	135,736	30-May-2008	06:07	x64

Windows Vista with Service Pack 1, 64-bit versions

File name	File version	File size	Date	Time	Platform
Storport.sys	6.0.6001.22190	162,872	30-May-2008	06:42	x64

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

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For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

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