Dear Experts,
We are trying to install the below system landscape and have some doubt about it.
It's a distributed environment, SCS we already installed in windows OS. For database we are trying to install in a high availability environment of linux. So my doubt is when we install SCS instance I choose
SAP Netweaver 7.4 SR 2
Oracle
SAP Systems
Application server Java
Distributed system
SCS Instance
As it is shown in the diagram. Let me know how we install the database instance on high availability. 
Regards,
Jituda