Disaster Recovery: INACCESSIBLE BOOT DEVICE or 0x0000007B STOP error after Image Export



A virtual machine created from the image export process boots to an "Inaccessible Boot Device" or "0x0000007B STOP" error screen regardless of the virtual storage controller selected.


  • Datto ALTO
  • Datto SIRIS
  • VMware
  • Microsoft Hyper-V


Attempt to boot the VM using all available virtual storage controllers before following these steps. 
The following instructions apply to VMs running on both VMWare and also Hyper-V.

If the Hypervisor is VMware:

1. Mount a Windows Recovery or install disk using VMware Player.

2. Boot the VM into the recovery environment.

3. At the first screen (Language Selection), type Shift + F10 for a command prompt, then type regedit to open the registry editor.

4. In the registry, highlight HKEY_LOCAL_MACHINE.

5. Click File Load Hive.

6. In the virtual machine's registry, expand the following key: HKEY_LOCAL_MACHINE\fix\ControlSet001\Services\intelide

7. Change the data for the Start value to 0.

If the Hypervisor is Hyper-V:

Right-click the C.vhd or C.vhdx disk image within your datastore, and choose Mount.  Verify that you can navigate to the location of the SYSTEM registry hive: C:\Windows\System32\config\SYSTEM.

Edit the registry hive

In the Registry hive, the vmbus START key and the LSI keys must be set to 0 to allow bootability.

1. Open regedit.

2. In the registry, highlight HKEY_LOCAL_MACHINE.

3. Click FileLoad Hive.

4. In the window that opens, select the virtual machine's OS (or C:) volume, then navigate to the following file and select it:


5. It will ask you for a name to use for the loaded hive.  For this example, name it as: fix

6. In the virtual machine's registry, expand the following key: 


7. Change the data for the Start value to 0.

The following two steps are for Hyper-V only:

8. In the virtual machine's registry, expand the following key: 


9. Change the data for the Start value to 0.

10. Make sure the following keys also have start values set to 0:


The following steps are for both Hyper-V and VMware

1. In the registry window, Highlight the following key:


Then select File->Unload Hive to unload the hive.

2. Exit regedit.

3. For Hyper-V: right-click the C.vhdx virtual disk under This PC or My Computer and choose Eject.

4. Reboot the VM.

If the issue persists, contact Datto Technical Support.

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