Failed to promote vdisk version from remote PVS server due to error "DeviceIoControl error: A device attached to the system is not functioning."
And this vDisk Remote Mount error does not prevent Promotion of a vDisk Version, which will leave the vDisk in an unusable state.

Customer will encounter vDisk Load Balancing issues even version gets promoted.

[CDF trace]

==============
3099,0,2017/07/03 15:17:07:28127,8992,1864,-1,PVS_Dll_MAPI,_#dotNet#_,0,,4,Information,"vdisk lock successfully acquired!",""
3100,0,2017/07/03 15:17:07:28128,8992,1864,-1,PVS_Dll_MAPI,_#dotNet#_,0,,4,Information,"full disk path = <*********.avhd>",""  
3101,0,2017/07/03 15:17:07:28128,8992,1864,-1,PVS_Dll_MAPI,_#dotNet#_,0,,4,Information,"about to enumerate storage bus device",""
3102,0,2017/07/03 15:17:07:28166,8992,1864,-1,PVS_Dll_MAPI,_#dotNet#_,0,,4,Information,"disk is remote, about to try bnitdi iteratively for each ip address",""
3103,0,2017/07/03 15:17:07:28167,8992,1864,-1,PVS_Dll_MAPI,_#dotNet#_,0,,5,EntryExit,"in CommandRunWithReturnMapDisk2.PlugInViaTdi",""
3104,0,2017/07/03 15:17:07:28168,8992,1864,-1,PVS_Dll_MAPI,_#dotNet#_,0,,5,EntryExit,"arg 0: diskName=*********",""  
3105,0,2017/07/03 15:17:07:28168,8992,1864,-1,PVS_Dll_MAPI,_#dotNet#_,0,,5,EntryExit,"arg 1: ipAddress=*****",""
3106,0,2017/07/03 15:17:07:28169,8992,1864,-1,PVS_Dll_MAPI,_#dotNet#_,0,,5,EntryExit,"arg 2: port=*****",""
3107,0,2017/07/03 15:17:07:28169,8992,1864,-1,PVS_Dll_MAPI,_#dotNet#_,0,,5,EntryExit,"arg 3: diskId=***",""
3334,0,2017/07/03 15:17:13:29384,8992,1864,-1,PVS_Dll_MAPI,_#dotNet#_,0,,4,Information,"DeviceIoControl error: A device attached to the system is not functioning.",""    <----- Error
==============

[System event log]

==============
エラー,2017/07/03 15:17:13,BNITDI,8,0,サーバーのオープン: *.*.*.* - NO_RESPONSE
==============

Manage vDisks from a PVS Server that is providing the vDisk.

Problem Cause