Checking disablement of Data Path failover setting

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If you disabled the data path failover in device driver’s setting by double-clicking the DisableDPF.reg file and rebooting your system, you can go into the registry by issuing the Windows regedit command to confirm that DPF is disabled. Look for a line
  • On Windows Server 2016: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ibmtp2k16
  • On Windows Server 2019 and On Windows Server 2022: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ibmtp

This line indicates that DPF is disabled in the driver. This setting takes effect only after your system is rebooted.

If you enabled Persistent Reserve on DPF disabled, look for a line
  • On Windows Server 2016: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ibmtp2k16
  • On Windows Server 2019 and On Windows Server 2022: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ibmtp
If you use ReserveTypeRegular.reg, then the ReserveType value is set to 0.