I have been trying to change the disks on a vm cloned from a template to be thin provisioned.
final List<VirtualDeviceConfigSpec> deviceChange = new ArrayList<VirtualDeviceConfigSpec>();
final VirtualMachineConfigInfo templateConfig = (VirtualMachineConfigInfo) template .getConfig();
final VirtualDevice[] vds = templateConfig.getHardware().getDevice();
for (int k = 0; k < vds.length; k++) { if (vds[k].getDeviceInfo().getLabel() .contains("Hard disk")) { final VirtualDeviceConfigSpec spec = new VirtualDeviceConfigSpec(); spec.setOperation(VirtualDeviceConfigSpecOperation.edit); VirtualDiskFlatVer2BackingInfo backing = (VirtualDiskFlatVer2BackingInfo) vds[k].getBacking(); backing.setThinProvisioned(true); vds[k].setBacking(backing); spec.setDevice(vds[k]); deviceChange.add(spec); }deviceChange is then added to a VirtualMachineConfigSpec which is added to a VirtualMachineCloneSpec which is then used to get a storagePod recommendation. Using this code I can successfully clone the template and change any of the other disk attributes but the disks on the cloned vm are always thick. I am running vijava 5.1 on VMFS5 datastores organized into a storagePod. Any help would be greatly appreciated.