MS SQL Server 2012 Multi Site Clustering

Scenario

I have  2 sites on 2 different subnets.  I have Windows 2012 and SQL 2012 Enterprise edition.

There is a SAN on  the primary site and one on the DR Site.

If a cluster is configured on 1 site I know how the storage would be configured.  

How does this work across the 2 sites how do you configure the shared disks?.

How does the failover work?

I have seen so many conflicting articles on this.  rather than point to others if you could simply comment that would be great.

Thanks.
ProjNetAsked:
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DBAduck - Ben MillerConnect With a Mentor Principal ConsultantCommented:
Here is a great document about exactly what you are talking about:
http://download.microsoft.com/download/D/2/0/D20E1C5F-72EA-4505-9F26-FEF9550EFD44/SQLServer2012_MultisiteFailoverCluster%20(2).docx

The major hurdle and key to multi-site failover is the storage devices. The SANs need to replicate to each other and have the ability to support failover to the other device.

This is key because you would not normally have a DR site that reaches back to the Primary site, since in a disaster, there is not going to be a Primary site any longer. So Storage replication is important and this is handled by the SAN.
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