Microsoft KB Archive/905565

= A different IRQ is displayed in the registry than is returned by system information tools for a device that uses the Storport.sys driver in Windows Server 2003, x64 Edition =

Article ID: 905565

Article Last Modified on 10/11/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Standard x64 Edition
 * Microsoft Windows Server 2003, Enterprise Edition
 * Microsoft Windows Server 2003, Enterprise x64 Edition

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Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry



SYMPTOMS
Consider the following scenario:
 * You have a computer that is running an x64-based or x86 version of Microsoft Windows Server 2003.
 * This computer has a storage device installed that uses the Storport.sys device driver.
 * You examine this device in Windows to determine the interrupt (IRQ) that is assigned to the device.

When you examine this device, you notice that a different interrupt is specified in the following registry location than is returned by other system information tools such as Device Manager:

HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\Scsi\Scsi Port

For example, if you view this registry subkey, you see information that is similar to the following information:

However, if you view this same device information by using a system tool such as Device Manager, you see information that is similar to the following information:

IRQ 48   QLogic QLA23xx PCI Fibre Channel Adapter    OK

Note Although  contains the wrong value, this configuration does not affect actual operations. The value in Device Manager is the right value.



CAUSE
This problem occurs because of a problem in the Storport.sys device driver that is included with the x64-based and x86 versions of Windows Server 2003.



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
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.

Keywords: kbtshoot kbbug kbprb kbpending kbwinservsetup KB905565

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