What is DRD?
Dynamic Root Disk (DRD) is an HP-UX system administration toolset that lets you create and modify an inactive system image without shutting down the system. To do this, you can clone the active system image and modify the cloned (inactive) system image while the system is running. When ready, you can boot the cloned image. Usually, the only downtime required is the rebooting process. System administrators use DRD to manage system images on HP PA-RISC and Itanium® -based systems. DRD complements other parts of your total HP solution by reducing system downtime required to install and update patches and other software.
