This may be a dumb question but I am looking to determine whether or not windows server 2012R2 naitively supports Mirroring of CSV's.  We have a client using Datacore who has two P2000 SAN's.  The Datacore boxes are set up in a cluster like configuration and handle the storage layer all the virtual machine live on. Datacore is configured to mirror one SAN to the other and should allow for resources to function normally in the event one SAN dies.  They would like to move away from Datacore and use native windows server capabilities. The ideal scenario I am trying to achieve is converting the two Datacore boxes into scale out file servers, connecting each SOFS to each SAN and creating two CSV's (One for Each SAN), lastly serving the storage to the hyper-v servers and VMM through a continuously available SMB3 share.  I have done this in a lab network but i can't seem to figure out how to, or if its even possible to, provide the client with the same level of redundancy they are achieving now.  In order to do this I would need to then mirror one CSV (Or SAN) to the other CSV to protect again enclosure failure (Keep in mind i cannot use storage spaces and would need to allow the P2000's to handle the RAID configuration as i have not found a way to remove the layer of abstraction for the physical disks through the P2000's to the scale out file servers). Is this achievable through Failover Cluster manager and if it is, in the event of a CSV failure will the failover to the replication CSV be automatic or manual.  Lastly if this is not achievable through failover cluster manager can it be coupled with another native feature like Hyper-V replica, or Storage replica (though it seems this is only available in server 2016).  Any guidance or recommendations would be great, I will continue digging to determine if i can convert the P2000's is to SAS connected JBOD's (If i am able to do this can storage spaces support the functionality i am looking for?). I would be happy to provide any follow up information as this is a rather complex scenario. Have a lot of clients using storage spaces with Scale out files servers but i haven't yet gone beyond directly connecting a single SAS JBOD.  In this scenario i can't really recommend they ditch their SAN's and buy JBOD's. 

I am looking to determine whether or not windows server 2012R2 naitively supports Mirroring of CSV's.

- No. There is no CSV mirroring feature in Hyper-V.

As you mention you have to use native Hyper-V features. It could be either Hyper-V replica (in case of long distance, e.g. another datacenter) or Live/Storage migrations. Also you can use mirroring feature of your SAN that I believe brings more complexity in your project since it wasn't planned before your infrastructure deployment.

• Proposed as answer by Alex LvMicrosoft contingent staff, Moderator 4 hours 24 minutes ago

Hi Diggity747,

Additional, we can design the storage HA by SAS HBA and we recommend that you use simple host bus adapters (HBAs) that do not support RAID functionality. If RAID capable, HBAs must be in non-RAID mode with all RAID functionality disabled. Adapters must not abstract the physical disks, cache data, or obscure any attached devices.

The related information:

How to Configure a Clustered Storage Space in Windows Server 2012

http://blogs.msdn.com/b/clustering/archive/2012/06/02/10314262.aspx

Deploy Clustered Storage Spaces

https://technet.microsoft.com/en-us/library/JJ822937.aspx?f=255&MSPPError=-2147217396

Im glad to be of help to you!