High Availability IP Failover may not work as expected in Mac OS X Server 10.4.7 (Universal) or later.
IP failover does not work with Intel-based Macs and Mac OS X Server 10.4.7 - 10.4.10
With Mac OS X Server 10.4.7 (Universal) or 10.4.10, IP failover does not work with Intel-based Macs. Update to Mac OS X Server 10.4.11 or later to use IP failover with Intel-based Macs.
Do not use mixed architectures in failover pairs
Do not mix Intel and PowerPC architectures in failover pairs. For example, if the master server is a Xserve Quad Xeon, do not use a Xserve G5 as failover. Conversely, a Mac Pro (Intel-based) should not be used as failover for a Xserve G5 (PowerPC-based).
Important: If you do not follow this guideline, data loss may occur.
Location of the failover scripts
The scripts are located in:
/Library/IPFailover
This folder is not present by default; you must create it yourself.
Note: The High Availability Administration guide incorrectly states the (/Library/Failover) directory is the location of the user-defined failover scripts.