Microsoft KB Archive/923801

= No Microsoft Windows Server Multipath I/O (MPIO) disks or logical unit numbers (LUNs) are available when you use MPIO for disks that are presented by an iScsi Host Bus Adapter (HBA) in Microsoft Windows Server 2003 SP1 =

Article ID: 923801

Article Last Modified on 3/27/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition

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SYMPTOMS
When you use Microsoft Windows Server Multipath I/O (MPIO) for disks that are presented by an iScsi host bus adapter (HBA), no MPIO-managed disks or logical unit numbers (LUNs) are available.

Note This problem occurs when you use the Microsoft StorPort storage driver (StorPort.sys) in Microsoft Windows Server 2003 with Service Pack 1 (SP1).



CAUSE
This problem occurs because the StorPort storage driver provides the wrong bus type for disks that are available by an iScsi HBA. When this occurs, MPIO is unable determine whether pseudo-LUNs for these disks should be created. Therefore, MPIO does not create pseudo-LUNs for these disks.



Service pack information
To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

Prerequisites
The following list contains prerequisites for the hotfix:
 * Microsoft Windows Server 2003 with Service Pack 1

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 item in Control Panel.

Windows Server 2003, x86-based versions


STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was first corrected in Windows Server 2003 Service Pack 2.



MORE INFORMATION
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

