Error: "the virtual disk is either corrupted or not a supported format" during snapshot operation

Products

• VMware vCenter Server
• VMware vSphere ESXi

Issue/Introduction

Move all the CTK files to a temporary folder to resolve this issue.

• Committing snapshots, either from the GUI or the console, fails with an error:
  
  Remove all snapshots VM_NAME the virtual disk is either corrupted or not a supported format
   
• Creating snapshots, either from the GUI or the console, fails with an error:
  
  Create VM snapshot VM_NAME the virtual disk is either corrupted or not a supported format
   
• When the snapshots are committing, the CTK files are not accessible.
   
• The vmware.log file on the virtual machine contains entries similar to:
  
  [YYYY-MM-DDTHH:MM:SS]: vmx| SNAPSHOT: SnapshotConsolidateOpenDisks failed: Could not open/create change tracking file.
[YYYY-MM-DDTHH:MM:SS]: vmx| DISKLIB-CBT : Shutting down change tracking for untracked fid 307069440.
[YYYY-MM-DDTHH:MM:SS]: vmx| DISKLIB-CBT : Successfully disconnected CBT node.
[YYYY-MM-DDTHH:MM:SS]: vmx| DISKLIB-VMFS : "/vmfs/volumes/datastoreuuid/VMName/VMName-000023-delta.vmdk" : closed.
[YYYY-MM-DDTHH:MM:SS]: vmx| DISKLIB-VMFS : "/vmfs/volumes/datastoreuuid/VMName/VMName-000021-delta.vmdk" : closed.
[YYYY-MM-DDTHH:MM:SS]: vmx| DISK: Failed to open disk for consolidate '/vmfs/volumes/datastoreuuid/VMName/VMName-000023.vmdk' : Could not open/create change tracking file (2108) 4700
   
• Files in the virtual machine folder on the datastore appears to be locked or corrupt.

Cause

This issue is caused by corrupt CTK files in the virtual machine folder.

Resolution

To resolve this issue, move all of the CTK files into a temporary folder.

 

Note: In the virtual machine folder, the CTK file is associated with each delta disk and flat file for that virtual machine.

To move all of the CTK files into a temporary folder:

1. Shut down the virtual machine.
2. Create a temporary folder in the virtual machine folder.
3. Move all of the CTK files into the temporary folder.
4. Right-click the virtual machine and select Snapshot > Snapshot Manage to consolidate the snapshots for the virtual machine.
5. Click Delete All.
6. Click Close.