Adding more than 15 disks to a VM fails

Hi,

I'm attempting to attach disks to a blank VM. I can add up to 16 disks just fine, but adding any more returns the vSphere error "The device '0' is referring to a nonexisting controller '1,001".

I was getting a similar error when I was attempting to overcome a lower disk limit (I think it was 4 or 5) as I was forcefully adding SCSI controllers to the VM, however I found if you add disks in batches of 4 this automatically adds SCSI controllers.

When I look at the VM in vSphere, I can see the final thing it does is a new SCSI controller (as all LUNs on SCSI 0 are full) and adds a new disk to that, but adding any more produces the above error.

My question is: Can anybody else reproduce this, and if not, how are you adding more than 16 disks to a VM through the vCloud SDK? I do not have this problem going through the vSphere Web Services SDK.

My code for adding disks is as below:

  private static VirtualDisk assignDisk(int parentID)

  {

    VirtualDisk d;

    int id = parentID + 10;

    System.out.println("Adding new disk(" + id + ") to SCSI controller " + parentID + " on LUN " + id);

    CimString cimString = new CimString();

    Map<QName, String> cimAttributes = cimString.getOtherAttributes();

    cimAttributes.put(new QName("http://www.vmware.com/vcloud/v1.5",

            "busSubType", "vcloud"), "lsilogic");

    cimAttributes.put(new QName("http://www.vmware.com/vcloud/v1.5",

            "busType", "vcloud"), "6"); // 6 is SCSI bus type

    cimAttributes.put(new QName("http://www.vmware.com/vcloud/v1.5",

            "capacity", "vcloud"), String.valueOf(1024));

    CimString elementName = new CimString();

    elementName.setValue("Hard Disk " + id);

    CimString instanceID = new CimString();

    instanceID.setValue(String.valueOf(id));

    //Need a unique instance ID for every piece of virtual hardware in the system

    com.vmware.vcloud.api.rest.schema.ovf.ResourceType resType =

            new com.vmware.vcloud.api.rest.schema.ovf.ResourceType();

    resType.setValue("17"); // 17 is SCSI disk

    RASDType diskItemType = new RASDType();

    diskItemType.setElementName(elementName);

    diskItemType.setInstanceID(instanceID);

    diskItemType.setResourceType(resType);

    List<CimString> diskAttributes = diskItemType.getHostResource();

    diskAttributes.add(cimString);

    d = new VirtualDisk(diskItemType);

    return d;

  }