![]() ![]() If MPIO is enabled, a server may access data on a storage using multiple paths that makes access to a connected LUN faster and allows using multiple network or HBA adapters. If the OS supports MPIO, it will see each of the disks presented to it in one copy. The following screenshot shows that Windows without MPIO sees 2 drives with different paths, which are in fact the same LUN (the list of presented disks may be displayed using the Get-Disk PowerShell cmdlet). ![]() If a server can access a logical disk (LUN) using multiple iSCSI initiator adapter or multiple Fibre Channel ports, the Device/Disk Manager without the MPIO module will show more LUNs than there actually are (= the number of paths to a LUN * the number of presented LUNs) if an MPIO module is not installed.
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