35738: Acronis Backup & Recovery 11.5: Powering on an Imported Virtual Machine Fails with the Error “Unsupported and/or Invalid Disk Type”

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Last update: 13-07-2017

After converting a partition backup to VMware Workstation an adding it to an ESXi host, you get the error "Unsupported and/or Invalid Disk Type”. To solve the issue, you have to follow the way to import the machine correctly in order to start it on your virtual host environment.

This article applies to:

  • Acronis Backup & Recovery 11.5


  • You have created an partition backup with windows OS on it;
  • This backup was converted to VMware Workstation format:
  • This converted virtual machine is now added to the ESXi host datastore by uploading it;
  • You add the virtual machine to the inventory and boot it;
  • During boot you get an error similar to this:

An unexpected error was received from the ESX host while powering on VM vm-38863.
Module DevicePowerOn power on failed
Unable to create virtual SCSI device for scsi0:0, '/vmfs/volumes/4f9ea917-7e69304b-6191-0026b9506510/W2032PCCTH013/W2032PCCTH013_1.vmdk'
Failed to open disk scsi0:0: Unsupported or invalid disk type 7. Ensure that the disk has been imported."


The problem is a result by not importing the virtual machine correct into the ESXi host environment. The created virtual machine is compatible with VMware Workstation 6.5 and can be used by VMware Workstation 6.5 or higher or VMware Fusion.

The underlying format used to store virtual machines on VMware Hosted products differs from the format used to store virtual machines on VMware ESXi hosts.


To run your VMware Workstation compatible virtual machine on your ESXi host, please follow these instructions Importing the Converted Virtual Machine Files to VMware ESX Server.

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