Hard I/O failure with MPIO storage targets connected to Windows Server 2012 R2


This error occurs when a thin-provisioned volume is being accessed over multipath I/O (MPIO) with the round robin load balancing policy enabled, and the MPIO is using more than eight paths. When this issue occurs, an I/O packet fails, and a thin provisioning error (event ID 144, 145, 146, 147, 148, or 149) is logged in the Windows event log. 


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


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Article ID: 3142535 - Last Review: ಫೆಬ್ರ 14, 2017 - Revision: 1

Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Standard, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Foundation