"volume": "volumeValue",
              "readOnly": true,
              "user": "userValue",
              "group": "groupValue",
              "tenant": "tenantValue"
            },
            "azureDisk": {
              "diskName": "diskNameValue",
              "diskURI": "diskURIValue",
              "cachingMode": "cachingModeValue",
              "fsType": "fsTypeValue",
              "readOnly": true,

              "volume": "volumeValue",
              "readOnly": true,
              "user": "userValue",
              "group": "groupValue",
              "tenant": "tenantValue"
            },
            "azureDisk": {
              "diskName": "diskNameValue",
              "diskURI": "diskURIValue",
              "cachingMode": "cachingModeValue",
              "fsType": "fsTypeValue",
              "readOnly": true,

    whenUnsatisfiable: whenUnsatisfiableValue
  volumes:
  - awsElasticBlockStore:
      fsType: fsTypeValue
      partition: 3
      readOnly: true
      volumeID: volumeIDValue
    azureDisk:
      cachingMode: cachingModeValue
      diskName: diskNameValue
      diskURI: diskURIValue
      fsType: fsTypeValue
      kind: kindValue
      readOnly: true
    azureFile:
      readOnly: true

          "volume": "volumeValue",
          "readOnly": true,
          "user": "userValue",
          "group": "groupValue",
          "tenant": "tenantValue"
        },
        "azureDisk": {
          "diskName": "diskNameValue",
          "diskURI": "diskURIValue",
          "cachingMode": "cachingModeValue",
          "fsType": "fsTypeValue",
          "readOnly": true,

              "volume": "volumeValue",
              "readOnly": true,
              "user": "userValue",
              "group": "groupValue",
              "tenant": "tenantValue"
            },
            "azureDisk": {
              "diskName": "diskNameValue",
              "diskURI": "diskURIValue",
              "cachingMode": "cachingModeValue",
              "fsType": "fsTypeValue",
              "readOnly": true,

              "volume": "volumeValue",
              "readOnly": true,
              "user": "userValue",
              "group": "groupValue",
              "tenant": "tenantValue"
            },
            "azureDisk": {
              "diskName": "diskNameValue",
              "diskURI": "diskURIValue",
              "cachingMode": "cachingModeValue",
              "fsType": "fsTypeValue",
              "readOnly": true,

	}
	if in.VsphereVolume != nil {
		in, out := &in.VsphereVolume, &out.VsphereVolume
		*out = new(VsphereVirtualDiskVolumeSource)
		**out = **in
	}
	if in.AzureDisk != nil {
		in, out := &in.AzureDisk, &out.AzureDisk
		*out = new(AzureDiskVolumeSource)
		(*in).DeepCopyInto(*out)
	}
	if in.PhotonPersistentDisk != nil {
		in, out := &in.PhotonPersistentDisk, &out.PhotonPersistentDisk

		**out = **in
	}
	if in.Quobyte != nil {
		in, out := &in.Quobyte, &out.Quobyte
		*out = new(QuobyteVolumeSource)
		**out = **in
	}
	if in.AzureDisk != nil {
		in, out := &in.AzureDisk, &out.AzureDisk
		*out = new(AzureDiskVolumeSource)
		(*in).DeepCopyInto(*out)
	}
	if in.PhotonPersistentDisk != nil {
		in, out := &in.PhotonPersistentDisk, &out.PhotonPersistentDisk

		return true
	}

	if volumeSpec.Volume != nil {
		// Check for volume types which are known to fail slow or cause trouble when trying to multi-attach
		if volumeSpec.Volume.AzureDisk != nil ||
			volumeSpec.Volume.Cinder != nil {
			return false
		}
	}

	// Only if this volume is a persistent volume, we have reliable information on whether it's allowed or not to

		}
	}
	if source.AzureDisk != nil {
		if numVolumes > 0 {
			allErrs = append(allErrs, field.Forbidden(fldPath.Child("azureDisk"), "may not specify more than 1 volume type"))
		} else {
			numVolumes++
			allErrs = append(allErrs, validateAzureDisk(source.AzureDisk, fldPath.Child("azureDisk"))...)
		}
	}
	if source.StorageOS != nil {
		if numVolumes > 0 {