Server Failover

I have 2 physically identical servers that will be running Server 2012 R2.  Is there a functional way that would allow me to configure server 1 (AD/DNS/DHCP/File) and have it mirror 1-1 to server 2?  What I am looking to do is have a things failover to server 2 if server 1 goes down so that everything continues to work seamlessly to the user.  Can this be done?
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Cliff GaliherCommented:
Not in a full 1:1 fashion as you describe. AD redundancy is simple. Have more DCs. They are multimaster and so it isn't a "failover" per se. DNS can similarly be done with AD integrated zones or secondary zones. DHCP has native failover capabilities in 2012. A true HA setup for file services requires a cluster, which requires shared storage. So each role is unique And requires its own planning.
JFizzleAuthor Commented:
I am familiar with and we have AD/DNS/DHCP redundancy.  I was familiar with the file cluster even though we have not set one up.  If I had both servers pointing at shared storage, wouldn't that still leave a single point of failure?
Cliff GaliherCommented:
Not if the shared storage is also redundant. SAS disks inherently have two separate paths. Connect two controllers and use some sort of resiliency for a disk failure (Raid, ZFS, storage spaces, IBM HACMP, etc) and there is no single point of failure. Many SANs are loosely architected this way already in-box.

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David Johnson, CD, MVPOwnerCommented:
no matter what you do you will always have a single point of failure somewhere down the line.  What you do is spend your money protecting the singe point of failure as much as possible.
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Windows Server 2012

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