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nportalatin's avatar
nportalatin
Copper Contributor
Jul 22, 2022

Hyper V Duplicates recovery points

Hi,

 

We have a HyperV host in a Windows Server 2016 STD with 3 VM Servers

  1. Domain Controller (Windows Server 2019)
  2. APP Server (Windows Server 2019)
  3. DB Server (Sequel) (Windows Server 2016)

The host have 4 TB GB HHD

128 GB RAM

2 Processors 2.20GHz

We used Veeam backup tool for backups.

Suddenly with every backup run, HyperV creates a Veeam recovery Checkpoint.

The free disk space of the disk is shrinking considerably.

We also noticed that when every Veeam recovery point is created it creates a duplicate of the AVHDX, MRT and RCT files in the Virtual Hard Disks folder.

I disabled the Veeam backup jobs  until it can be fixed, because if we get out of disk space the VM Servers will not startup.

NOTE: This are the production Servers and no other environment for test exists.

 

Hope you can help me thorough this issue.

Hyper-V
storage
windows server

1 Reply

  • Jamony's avatar
    Jamony
    MCT
    Sep 18, 2026

    The .avhdx, .mrt and .rct files indicate checkpoint/backup activity that may not be getting fully merged or cleaned up.

     

    Check existing checkpoints:

     

    Get-VMSnapshot -VMName "<VMName>"

     

    Then check VSS:

     

    vssadmin list writers

     

    All relevant writers should show a stable state without errors.

     

    Also review the corresponding Veeam job/session logs.

     

    Most importantly: do not manually delete AVHDX files.

     

    When Hyper-V removes a checkpoint, the AVHDX contents are merged back into the parent disk. Manually deleting them can break the VHDX chain and cause data loss.