Hello.
I have a hyperV cluster of 4 servers hosting about 20 virtual servers. Throughout the week, the virtual guests are balanced between the 4 servers. These servers run Server 2008 R2. In recent weeks, we have been seeing something happening where when we come in Monday morning, the virtual servers have been migrated to the last HyperV in the array and some of the guests did not start back up (most likely due to resource allocation). I have applied all critical Microsoft updates as well as updated the agent from SCVMM (that is running server 2012 R2). This last weekend, at least the guests were split between the last 2 HyperV servers, and only 3 of the guests were not up and running.
In looking at the event logs, there are a number of iSCSI errors, that seem to happen all day not just Saturday morning which is when we get email alerts that some of the servers are down, and the errors (event ID 129, 39 and 9 in that order) say the details are in the dump data. How do I get the details of what is going on? and would these errors cause the machines to migrate to other servers and not migrate back?