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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Article ID: 967736 - Last Review: Feb 10, 2009 - Revision: 1