Our website provided a free download of Apple Xserve Remote Diagnostics 1.0 for Mac. The application lies within System Tools, more precisely General.
From the developer:
This version is required if Mac OS X Server 10.4 (Tiger) is being used on a Xserve G5 that will be diagnosed. This version is required if a Xserve G5 that will be diagnosed uses 2GB memory DIMMs. This version adds additional memory tests, and other improvements. This software will only install onto Mac OS X client version 10.3 and later boot volumes, or onto Mac OS X Server version 10.3.3 or later boot volumes.
You may want to check out more Mac applications, such as Xserve RAID Admin Tools, Apple Remote Desktop or Apple Configurator, which might be related to Apple Xserve Remote Diagnostics.
Device Assistants
Remote Computing