SDW fails to create Snapshot by timeout while waiting for the LUNs to flush

Applies to

SnapDrive for Windows (SDW) 7.1.5

Issue

• Command sdcli snap create fails by the following error.

Unable to create a Snapshot of a LUN.
Error: SnapDrive Snapshot copy creation timed out while waiting for the LUNs to flush their file systems.

• Snpdrvdbg.log shows that waiting for all threads to finish flush is timed out in CVirtualDisk::FlushVolume.

Example:

PID:<PID>    TID:<TID>    SnapCreateHelper.cpp@1243        Resume 1 threads for disk flush
PID:<PID>    TID:<TID>    SnapCreateHelper.cpp@1253        Waiting for 120 seconds for all threads to finish flush
PID:<PID>    TID:<TID>    SnapCreateHelper.cpp@266        FlushVDiskThreadProcRemote - Begin, flushhost:cp2spdb2
PID:<PID>    TID:<TID>    VirtualDisk.cpp@7853        Entered CVirtualDisk::FlushVolume
PID:<PID>    TID:<TID>    VirtualDisk.cpp@7863        Open handle to '\\?\Volume{b6a2cb58-8f3b-474e-9e35-1ebb6cd92a91}' device for flush
PID:<PID>    TID:<TID>    VirtualDisk.cpp@7873        Start Flush for \\?\Volume{b6a2cb58-8f3b-474e-9e35-1ebb6cd92a91} device
PID:<PID>    TID:<TID>    SnapCreateHelper.cpp@1262        Timed out waiting for all threads to finish flush
PID:<PID>    TID:<TID>    EventLog.cpp@344        Start NeedMuteEvent(): dwEventID 251 dwNumStrings 3 enumEvtMuteGrp -1

PID:<PID>    TID:<TID>    EventLog.cpp@438        End NeedMuteEvent(): dwEventID 251 dwNumStrings 3 enumEvtMuteGrp -1 bRet=00

PID:<PID>    TID:<TID>    localerror.cpp@82        Is_VDS_ITF_Error(): false.
PID:<PID>    TID:<TID>    localerror.cpp@94        Is_WMI_ITF_Error(): false.
PID:<PID>    TID:<TID>    SnapCreateHelper.cpp@1297        SnapDrive Snapshot copy creation timed out while waiting for the LUNs to flush their file systems.
 HRESULT 0xc004028e.
PID:<PID>    TID:<TID>    localerror.cpp@82        Is_VDS_ITF_Error(): false.
PID:<PID>    TID:<TID>    localerror.cpp@94        Is_WMI_ITF_Error(): false.
PID:<PID>    TID:<TID>    SnapCreateHelper.cpp@1348        Flush disks initial status:0xC004028E Number drives to flush:1, actual drives flushed:0, drive flushes attempted:1 and total number drives to possibly snapshot:1
PID:<PID>    TID:<TID>    SnapCreateHelper.cpp@1370        FlushVDisks - end hr:0xC004028E
PID:<PID>    TID:<TID>    SnapShot.cpp@7337        SnapDrive Snapshot copy creation timed out while waiting for the LUNs to flush their file systems.
 HRESULT 0xc004028e.