For ORACLE fail safe is concerned You need a NT cluster.
You have to ask the NT system administartor about this.Oracle has to installed on both nodes.Where oracle files are there those disks should be common to both the nodes.



But with oracle fail safe if the oracle fails in one node (A).It will start up and running in the Node B.So for databases which has 24*7 requirements they can go for this.I have worked on this for a year and it worked with any problem.Even oracle 7.3 can be used on this.You do not need to about ORACLE parallel server concepts and all.

For me it worked Wonderful.