I currently have 2 clusters A & B on 2 sites. The 2 Clusters have 2 instances (Inst1 & Inst2) of SQL 2008 R2 Standard on Windows 2008 R2 Ent each. After changes to SAN, I now have synchronously replicated disks between sites/rooms. All nodes are in the same subnet.
My question is what is the best way to create Node AND/OR Disk Majority Single Cluster so one SQL instance (Inst1 needs HA no DR) is not failed over to second site and the other (Inst2 needs HA & DR) can be recovered from DR site. HA is must within each site for both instance. But can live with no Automatic Start-up after fail over to second site.
Don't plan to use expensive Cluster Enabler Software. I have to perform this carefully without too much downtime. I am thinking along the lines of Migrating all instances(applications) to Cluster A and then trashing Cluster B. Is that possible? Any suggestions much appreciated.