Dear whom reed my questions
I will explain you my servers environment and I what in mind to do and if you can help me in details please
I have four servers with windows server 2012 standard edition one is primary domain controller and the seconed is additional domain controller and all in the same local network in a single site and I make the last two other servers in failover cluster node1 and node 2 as well as for my four servers I have two NAS storage server type Qnap ts869 each of them have 21 targets
in my failover cluster I configured role file server resource manager and through the ISCSI initiator I got 42 volume (21 for each NAS storage) I maked folder in each volume of one of the storage (21) in another word just I use one NAS storage
if one of my server failed (node 1 or node 2) the user will not feel what happen and the data will be high availability
until this moment I think every thing is clear OK?
now I want to make a copy for my 21 volumes of one my storages and put it in the other 21 volume in another NAS storage
you may be will ask why I want to do this ? cause if one of my NAS storage failed for any reason the seconed NAS storage which is have a copy for the failed storage will continue to provide end users with data
and in this case I make high availabilty for both case failed one of my node servers or one NAS storage servers
so how I can do this aim in a professinal manner or can I make a combination in my failover cluster between two different role (file server resource manager and DFS)
I can make my aim in a a basic way or as begginer so I make a copy for each volume and save it in the volume of the other NAS manually and when one om my NAS storage failed I will make share for the folders which I copied and put them in the volumes in the another NAS storage
but this manner I see it not practical or ineffective it give us what we need may be in 95% but it difficult and the hard time which we spend in copying ass well as we can not support real replication
the senario that I want and what I explained above find it with a technology called DRBD but for sorry it work with LINUX systems not windows it take a mirroe for whole storage block and but in another so any storage failed the other will be work directly instand
my senario that I try to make as a failover for the NAS storage so I I can do more than this by making them in load balance so in the same time users use some data stored in some volumes of one NAS and other data stored in the volumes of the other NAS
I hope if every thing is clear to you and please if you have solution for this case I wish the answer be in details not in wide line
thank you again for your time and help