// cachingMode is the Host Caching mode: None, Read Only, Read Write.
  // +optional
  optional string cachingMode = 3;

  // fsType is Filesystem type to mount.
  // Must be a filesystem type supported by the host operating system.
  // Ex. "ext4", "xfs", "ntfs". Implicitly inferred to be "ext4" if unspecified.
  // +optional
  optional string fsType = 4;

  // readOnly Defaults to false (read/write). ReadOnly here will force