Fail Safe is a Windows-only product. To get similar functionality on Solaris, you'll need to purchase and configure a failover clustering product suchas SunCluster or Veritas Cluster Server.The documentation for standby databases is incorporated into the standard server documentation for 8.1.7 in the book titled "Oracle8i Standby Database Concepts and Administration". Data Guard was present in late versions of 8i, but wasn't really fully implemented until 9i. If you're planning to use standby databases, you shouldn't have any problems in 8i, but the features available in 22.214.171.124 and higher may make it worth upgrading.
This was first published in December 2004