Unable to boot KVM VPS in SolusVM: Only a single IDE controller is supported for this machine type

Symptoms 

• Unable to boot KVM VPS with IDE driver in SolusVM

• Upon pushing the SolusVM > Virtual Servers > VPS > Reboot (Debug) button the following error is shown:

  SVM_ERROR: error: Failed to create domain from /home/kvm/kvm101/kvm101.xml
  error: unsupported configuration: Only a single IDE controller is supported for this machine type

• Three or more secondary disks are added to a VPS 

Cause

There is a KVM limitation for the IDE devices - it is limited to a maximum of four virtualized (emulated) IDE devices per guest virtual machine: the main disk, CD-Rom, and two additional disks. 

Resolution

1. Log in to the SolusVM admin panel.
2. Enable the Virtio Driver instead of IDE in SolusVM > Virtual Servers > VPS > Settings > General > Disk Driver > Virtio:
   

Note: for Windows VPSs make sure the Virtio Driver is installed inside the VPS.