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shared storage for Microsoft cluster

Posted on 2013-10-31
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Last Modified: 2013-11-12
Experts

I've been playing with 2 virtual servers on a test Microsoft SQL cluster scenario. I am a bit confused about  the shared storage where both nodes will watch ( databases , etc ).

I tried to connect both servers to the same iSCSI LUN , they connect but files from server 1 cannot be seen by server 2 and viceversa.

it seems many other people are confused over Internet and many have their own understanding of storage protocols and file systems.

It looks like that iSCSI cannot be used for shared storage between 2 servers since it's being mapped as a local drive .

Also , it looks like that NTFS is not the right FS for such scenario.

I tried to share a drive and just use mapped drives ; but  Microsoft cluster service cannot see mapped drives.

So .. I am confused .. please ONLY reply if you have a definite answer .

Thanks
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Question by:akhalighi
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Expert Comment

by:andyalder
ID: 39615508
You have not set up clustering. Presumably you want to use active/passive Windows clustering, if so once you configure the MS clustering service and add the shared iSCSI disk as resource it will allow the active node to access the disk while the passive node sits there ready to take over when required. The problem you are seeing of files written by one server not being seen by the other server is due to the master file table being cached in RAM. You will not have that problem once clustering is configured because it only allows the standby node to mount the resource after the active node has failed, the cluster service will block normal access to the volume one it is a cluster resource.

http://technet.microsoft.com/en-us/library/ms179410%28v=sql.105%29.aspx is a good starting point for setting your SQL cluster up.
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by:akhalighi
ID: 39616606
@andyalder : Good point ; the problem is that iSCSI disk doesn't show up in Microsoft Cluster when I try to add disks. I am using windows 2012 . it only shows local  partitions and if I add them , it fails since they are not shared storage.
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andyalder earned 2000 total points
ID: 39617707
All MS FAQ says is that you should use dedicated adapters for iSCSI, so in a virtual environment you may have to add a second virtual NIC. Strange the cluster management shows local partitions but not partitions on the iSCSI target when you can see them in disk administrator.
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