### Requirements and Considerations

This topic includes important pre-installation information. Read this information carefully before beginning the driver installation.

- The Digi HP-UX driver supports versions 10.20 or later of the operating system. It will not work with earlier versions.

- The following operating system patches may be required if you have a multiprocessing computer. Contact HP technical support if you need help determining whether these patches are necessary on your system:

  PHNE_20008

  PHKL_16209