Hi
A) Database to be needs to be installed separately or it will instal silently while installation
During the SAP installation Database instance is separate and also Kindly follow the below steps of HA environment
1. Central services instance for ABAP installation.
2 Central services instance for JAVA installation.
3 First MSCS node installation
4 Database Instance Installation using backup restore method
5 Additional MSCS node installation
6 Enqueue replication server installation for ABAP in Node I
7 Enqueue replication server installation for JAVA in Node I
8 Enqueue replication server installation for ABAP in Node II
9 Enqueue replication server installation for JAVA in Node II
10 Central Instance Installation in Node I
11 Secound node installation as per the installation guide
12 Post processing steps after system copy
B) we need to database clustering as well?
Kindly go the Sybase database installation details
Thanks & Regards
Sriram