Can someone please point me to right direction why I can't see igroups in Snapdrive for Windows (SDW) which have WWN of all nodes of a cluster.
Currently I am using SDW 6.3 and Ontap 7.3.2 and if I create an igroup which has WWN of a single node only then I can see in SDW however when I have an igroup having all nodes of cluster then SDW doesn't list it at all.
Do we know why this limitation is in effect as looking at 256 igroups limit across filer cluster we are little worried that we may hit the wall very soon.
We are using NetApp MPIO and everything is correct, looks like I wasn't clear enough on my question.
Actually when I create a LUN from SDW and use automatic mapping than SDW creates 4 igroups on filer for 2 node windows cluster (2 FC port/host), however going this way soon we will hit max igroup limit of filer which we don't want.
Now if we manually create an igroup on filer which has all 4 WWN then we can't create luns from SDW as on mapping screen SDW doesn't lists igroup which we have created manually because it has WWN of other windows cluster node as well, however if we create one igroup per host which has both the ports of host then it lists correctly in igroup window.
So my question is why SDW can't list an igroup which has WWN of other node of cluster?
Guidelines for mapping LUNs to igroups There are several important guidelines you must follow when mapping LUNs to an igroup. • You can map two different LUNs with the same LUN ID to two different igroups without having a conflict, provided that the igroups do not share any initiators or only one of the LUNs is online at a given time. • Make sure the LUNs are online before mapping them to an igroup. Do not map LUNs that are in the offline state. • You can map a LUN only once to an igroup or a specific initiator. • You can add a single initiator to multiple igroups. but the initiator can be mapped to a LUN only once. You cannot map a LUN to multiple igroups that contain the same initiator. • You cannot use the same LUN ID for two LUNs mapped to the same igroup. • You cannot map a LUN to both FC and iSCSI igroups if ALUA is enabled on one of the igroups. Run the lun config_check command to determine if any such conflicts exist.