Auto Mirror - Version 2.52 A real time mirroring and backup tool, designed for Windows NT 4.0. It keeps mirrored data up to date with the original data.. Some advantages: access any files on the system, NT registry, files opened with exclusive access; back up data to a directory on local drive and/or on the network; mirroring huge files without copying entire file - important for database mirroring; runs as a service - able to run on servers; NT undelete capability is coming soon.