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A Tape Backup Medium Changer may not detect properly in the Device Manager

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Microsoft Knowledge Base Article

This article contents is Microsoft Copyrighted material.
©2005-©2007 Microsoft Corporation. All rights reserved. Terms of Use | Trademarks
Article ID: 967736 - Last Review: February 10, 2009 - Revision: 1.0

A Tape Backup Medium Changer may not detect properly in the Device Manager

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System TipThis article applies to a different version of Windows than the one you are using. Content in this article may not be relevant to you. Visit the Windows Vista Solution Center
Source: Microsoft Support
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RAPID PUBLISHING

RAPID PUBLISHING ARTICLES PROVIDE INFORMATION DIRECTLY FROM WITHIN THE MICROSOFT SUPPORT ORGANIZATION. THE INFORMATION CONTAINED HEREIN IS CREATED IN RESPONSE TO EMERGING OR UNIQUE TOPICS, OR IS INTENDED SUPPLEMENT OTHER KNOWLEDGE BASE INFORMATION.
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Action

When adding a Medium Changer Tape Backup device to a Windows Server 2003 or Server 2008 system, the system's device manager may not show all components of the device: the tape drive(s) or the changer (robotics). 
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Result

Portions of the device are not visible in the device manager.  As such, the Removable Storage service based applications, including Tape Backup software, may not be able to fully utilize the Medium Changer. 
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Cause



The HBA (host bus adapter) the Medium Changer is connected to is using Storport compatible drivers and the Medium Changer uses a non_hierarchical scsi REPORT_LUNS structure.  When a seemingly valid REPORT_LUNS structure is returned from the target device, it will be used to determine the LUNs available to the operating system. If the target uses a non-hierarchical REPORT_LUNS structure, storport will still use it to identify the LUNs, even though it does not understand the format. This can result in LUN 0 (the tape drive) being correctly identified , but not LUN 1 (the robotic changer device), so it does not show up in device manager or RSM (Removable Storage Manager).

This can be a PCI-E SCSI host bus adapter, or other slot  or interconnect technology.  For example: a Fibre-Channel HBA in a PCI slot. 

 

 

 

 
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Resolution

Install Scsiport drivers for the HBA rather then Storport. 
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APPLIES TO
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Small Business Server 2008 Standard
  • Windows Small Business Server 2008 Premium
  • Windows Server 2008 Standard
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 for Itanium-Based Systems
  • Windows Server 2008 Enterprise without Hyper-V
  • Microsoft Windows Server 2003 R2 Enterprise Edition KN
  • Microsoft Windows Server 2003, Enterprise x64 Edition
  • Microsoft Windows Server 2003 R2 Datacenter Edition (32-Bit x86)
  • Microsoft Windows Server 2003, Standard Edition (32-bit x86)
  • Microsoft Windows Server 2003, Standard x64 Edition
  • Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
  • Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
  • Microsoft Windows Server 2003 Service Pack 1
  • Microsoft Windows Server 2003 Service Pack 2
  • Microsoft Windows Server 2003 R2 Standard Edition KN
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Keywords: 
kbnomt kbrapidpub KB967736
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