I've come across a really odd problem this week.
We run Cisco UCS (B200M3) with Hyper-V 2012 R2 and are trying to connect in our new NetApp CDOT solution.
Our problem is that when Failover Clustering is installed, disk enumeration starts hanging and the machine falls apart. To narrow down the problem we've tried connecting in from a 2012R2 VM on VMware with FCM installed and that's fine. But we can't connect from our 2008R2 or 2012R2 Hyper-V hosts which both sit on UCS.
I've tried a completely vanilla install to the node and just connected the iSCSI NICs and targets on the host. All is fine. The very next step is I add the FCM role and bang.... all stops working (no configuration - just adding the role!). If I then uninstall the role it comes back to life.
These hosts successfully talk fine with our older Metrocluster solution, it's just with the CDOT. Need to understand what the differences are and why there's a problem with the UCS nodes only.
Any thoughts very welcome!!