Windows domu DRBD backend problem

[Kotán Attila <info@xxxxxxxx>]

    Hello, 
    
    I use many windows as xen domu and installed your winpv driver. I
    experience the problem in very special case, but not an unique. 
    The windows freeze when the disk backend of domu is DRBD and the the
    DRBD secondary node (DRBD status=secondary) goes to disconnect, for
    example i reboot the computer.  
    
    The problem is reproducible: 
          - Two DELL server with PERC RAID controller
          - RAID0,1,10 virtual disks boot side
          - DRBD backend is an RAID virtual disk
          - Primary side installed an Windows with XEN VBD driver
          
          If the secondary side goes to offline, the DRBD status change
          to disconencted, but working continuously, but the windows freeze.
          
          - No problem with linux domu
          - No problem until the winpv VBD install
          - No problem if the DRBD backend is not a RAID virtual disk
          (for example with M.2 NVME backend) 
          
          I tested the 
          - Winpv driver 9.0 (signed) 
          - Winpv driver latest (testsigned)
          - citrix xenserver driver (managementagent-9.4.0)
          and the problem is occurs in everyone. 
          
          Everyting workin fine until the secondary DRBD node goes to
          offline / disconnected. I think i tested many situation and
          finally left the WinPV driver what is caused the problem i
          mean. 
          
          Do you have any tipp, what can i set?
          How can i debugging this problem? 
          I try to see what happened on linux domu when the DRBD status
          change, but i can't find anything. 
          
          Have any ideas? 
          
          Thank you and best regards.
          Attila