3

Host Machine:

  • Intel Core i3 3120M @ 2,50Ghz 2,50Ghz
  • 12GB RAM
  • Windows 10 Enterprise 64Bit
  • 750GB HD
  • 250GB SSD

Virtual Machine:

  • Windows Server 2008 R2 Enterprise
  • 4 virtual processors
  • 8GB RAM

I'm having some problems to create checkpoints on my VM. When i try to do it, Hyper-V goes until 19% of the creating progress, and then this error screen appears:

Error1

I've analyzed Event Viewer's logs, and on the Hyper-V Worker > Admin section, it shows the following messages:

'PNSP2013' could not initiate a checkpoint operation: %%2147754996 (0x800423F4). (Virtual machine ID 69EAA8C6-E8E9-4585-97AE-5633F400BB89)[

And I also collected VSSDiag's log, which contains no relevant information (at least for me)

A VSS writer has rejected an event with error 0x800423f4, The writer experienced a non-transient error. If the backup process is retried, the error is likely to reoccur. Changes that the writer made to the writer components while handling the event will not be available to the requester. Check the event log for related events from the application hosting the VSS writer. Log:

Operation:    PostSnapshot  Event
Context:
Execution Context: Writer
Writer Class Id: {b2014c9e-8711-4c5c-a5a9-3cf384484757}
Writer Name: NTDS 
Writer Instance ID: {2b09511a-25fd-47cd-929f-4f1f60cc1594}
Command Line: C:\Windows\system32\lsass.exe
Process ID: 636NTDS

Some important points to consider:

  1. I have enough space on the SSD drive to store the checkpoint file.
  2. I've tried to stop all non-Microsoft services on the VM and restart it, but no success
  3. If i turn off the VM, the checkpoint can be created with no errors.
  4. According to this article, i've also checked the KB982018, and it's already installed on the VM.

I can't figure out what the hell is going on... Some help?

  • Is the Server VM a Domain Controller? If you run vssadmin list writers in the VM, what does it report for the NTDS VSS writer's 'State' and 'Last Error'? What does automount run from within diskpart report? – Ƭᴇcʜιᴇ007 Apr 27 '16 at 17:21
  • @Ƭᴇcʜιᴇ007 Yes, it is a Domain Controller. About the vssadmin, when i try to make the checkpoint, the NTDS says: Failed on the State and "Non retryable error" on the "Last Error". When i run diskpart then automount, it says: "automatic mounting of new volumes enabled" – Victor Alencar Santos Apr 27 '16 at 17:57
  • Just to make sure, have you tried rebooting the host? Also, in the registry at HKLM\Software\Microsoft\Windows NT\CurrentVersion\ProfileList do any of the listed profiles end with .bak? Also you say you have enough space to store the snapshot, but exactly how big is the VM and how much space do you actually have free on the host's system drive? – Ƭᴇcʜιᴇ007 Apr 27 '16 at 18:00
  • @Ƭᴇcʜιᴇ007 Yes, i've already rebooted, and no way. After rebooting, all VSS writers went to Stable state (including NTDS) but when i try to make the ckeckpoint, the error occurs again. About the registry key, no profiles are listed with .bak – Victor Alencar Santos Apr 27 '16 at 18:05
  • Have you got SQL server installed on there as well (helpfully not, it's a DC, but you never know ;) )? If you spin up a new VM, and install Server 2008 R2 (and nothing further). does it exhibit the same problem? – Ƭᴇcʜιᴇ007 Apr 27 '16 at 18:08
7

This is a known issue for pre-2016 DCs running in VMs on 2016/Win10 Hypervisors.

The problem is the new Production Checkpoint architecture. If you change the Checkpoint type to Standard in the VM's settings, the Checkpoint will succeed.

  • 1
    Damn dude, you're a freaking genius! Thank you SO much for this. – Victor Alencar Santos Apr 12 '17 at 18:06
  • @VictorAlencarSantos — Not really... I just happened to stumble onto the answer, that's all. And spent a day futzing with it. But thanks :-) – InteXX Apr 12 '17 at 18:31
  • You've just saved me hours of wasted time, thank you so much. – Basic Apr 27 '18 at 20:12
  • @Basic: How do you know it was hours if you didn't waste it? ;-) – InteXX Apr 27 '18 at 22:22
  • @InteXX Because I wouldn't have started looking there. I thought ti was an issue with Shadow Copy on the volume itself, eg a disk issue. – Basic Apr 28 '18 at 17:52

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