You should also have established the appropriate level of cross-platform interoperability for your site if both Windows and non-Windows computers are in use as Rational ClearCase hosts. All the requirements described in the Administrator's Guide for user and group accounts on both Windows, the UNIX system, and Linux must be met if you are using a NAS device to host Rational ClearCase data that is accessed from Windows and non-Windows computers. NAS devices often provide their own implementation of cross-platform file-access solutions, such as NFS and CIFS (SMB), but these implementations usually require that any user who must access files on the NAS device can be authenticated using the same user name and group name regardless of the host platform being used. Verify that Rational ClearCase users at your site can create and delete files and directories on the NAS device from computers running the UNIX system, Linux, or Windows before proceeding with more NAS device configuration steps.