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Re: [win-pv-devel] xen pv drivers 8.2 creating eventid 6 error on 2012 R1

Hi Paul,


I have not seen any issues yet but I have not started using the drivers in production on anything meaningful.  I've just been running it on test VPS.  I'm a stickler for clean logs and try to resolve any recurring errors as I can so I noticed this one which appears to be coming from the xen 8.2 drivers and wanted to report it.    Thanks for checking on it when you get time.




From: Paul Durrant [mailto:Paul.Durrant@xxxxxxxxxx]
Sent: Tuesday, August 01, 2017 1:21 AM
To: 'Brandon Shoemaker' <brandon.shoemaker@xxxxxxxxx>; win-pv-devel@xxxxxxxxxxxxxxxxxxxx
Subject: RE: [win-pv-devel] xen pv drivers 8.2 creating eventid 6 error on 2012 R1


Hi Brandon,


  It’s possible that we’re trying to delete a registry key too early in boot and that’s what’s causing the event. Does this event cause you any particular problem, or is it something that you just happened to notice? It seems like a very easy repro so I’ll check it out myself when I get a chance.






From: win-pv-devel [mailto:win-pv-devel-bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of Brandon Shoemaker
Sent: 31 July 2017 22:16
To: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
Subject: [win-pv-devel] xen pv drivers 8.2 creating eventid 6 error on 2012 R1


Hi list,


I wanted to report a recurring issue I see with the xen pv drivers 8.2.  I have clean installed a VPS three times to confirm this problem.  After installing Windows 2012 R1 and then the 8.2 drivers there is a recurring event id 6 error every reboot only after installing the drivers.


Event ID 6 error

"An I/O operation initiated by the Registry failed unrecoverably. The Registry could not flush hive (file): ''."


Steps to reproduce:


  1. Install Windows 2012 R1 (I added .net 3.5 and telnet client features right after install also)
  2. Fully update
  3. Check Event Viewer logs before installing drivers and you will not see any Event ID 6 error, clear logs
  4. Install Xen PV 8.2 Drivers
  5. Reboot
  6. Event ID 6 error will now recur every reboot


I do not know if the same error happens on 2012 R2 as I’m using R1 still for specific reasons.


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