Error encountered trying to restore cpu state from file……

By | April 5, 2009

Today a one of my customers encountered an error when trying to revert to an snapshot.
They recived the following error:
“error encountered trying to restore cpu state from file /vmfs/volumes/…./xxxxx.vmsn”

After a bit of googleing if came up with the problem.
The error occures when a VM with snapshots (taken when VM is PoweredOn) is migrated or moved to a host with another CPU stepping – and the VM is reverted to ine of theise snapshots.

To correct the problem you have to complete the following steps:

  • Revert to the snapshot you want to use.
  • Make sure the VM is powered off.
  • Edit the VM’s .vmx file and remove the line “checkpoint.vmstate”
  • Power on the VM
  • Delete the snapshot

If you still want a snapshot of the VM in it’s current state

  • Shutdown the VM
  • When its powered off create a new snapshot
  • Power on the VM again to start work with it

This solution has to be applied to all VM’s with snapshots taken while the VM was powered on.

2 thoughts on “Error encountered trying to restore cpu state from file……

  1. rick montalvo

    I have been looking for a solution to this problem for months. I tried a number of things but none of them worked. This is the only one that saved the day for me.

    Thank you again,
    Rick Montalvo

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