MSSQL2012 active/passive cluster convert to active/active cluster

Good day.
We have 2-node active/passive MSSQL2012 cluster (on Win 2008 R2). One "default" instance.
We want convert to active-active, (multi-instance).
As I understand, one SQL instance (existing) will run on 1 cluster node and the second (new) instance on the 2 cluster node.
I have some questions:
- we have cluster virtual name and ip address for existing MSSQL instance, for the second MSSQL instance we need to create another name and ip ?
- for second MSSQL instance we can create 2 separate cluster disks (for DB and LOGS) ?
- for second MSSQL instance we can create another DTC instance and bind it to the second MSSQL instance ?
- we can use existing physical LAN connectors on our servers (data and heartbeat) or we need to add new LAN adaptors ?
- quorum disk is the same for all instances ?
Sorry for my bad English.

I have some questions:
- we have cluster virtual name and ip address for existing MSSQL instance, for the second MSSQL instance we need to create another name and ip ?
Yes that would be required.
- for second MSSQL instance we can create 2 separate cluster disks (for DB and LOGS) ?
Yes it will be in different resource group and you can have different disk for them.
- for second MSSQL instance we can create another DTC instance and bind it to the second MSSQL instance ?
Same MSDTC can be used for multiple instance.
http://blogs.technet.com/b/askcore/archive/2009/02/18/how-to-configure-multiple-instances-of-distributed-transaction-coordinator-dtc-on-a-windows-server-failover-cluster-2008.aspx
- we can use existing physical LAN connectors on our servers (data and heartbeat) or we need to add new LAN adaptors ?
Best to ask network team
- quorum disk is the same for all instances ?
Quorum is for windows cluster not for SQL server so Yes its same for all instances
Sorry for my bad English.
Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers

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