I am talking about clustered SQL instances here... and of course they are running on top a ESX cluster.
Referring to this...
"The SnapInfo LUN must be a cluster disk resource in the same cluster group as the SQL Server instance being backed up by SnapManager"
Does it mean that ONLY ONE cluster disk resource (i.e. one shared disk) is enough for SnapInfo? Think of scenario where there is a two node cluster running two SQL instances on each of them individually. In case of a failure to one node, the remaining node take over the resources held by the failed node and operate both SQL instances.
In the above case, how SnapInfo should be allocated? Two separate iSCSI LUNs to individual nodes as cluster resources (i.e. both nodes can see the disks but one node held the ownership) OR a single iSCSI LUN as a cluster resource?