Hello Folks,
I am a bit confused. I have my storage (EMC CX) set to failover mode 4, rebooted host and now see they are set as VMW_SATP_ALUA_CX. I believe now, I can go to each datastore and change the path selection to "Round Robin (VMware)". I do a lot of MSCS, and noticed that Round Robin is not supported with MCSC. I found the below from VMware. It states Round Robin PSP is not supported for luns mapped by RDM, but then there is a "note" that says with NMP, clustering is not supported when set to Round Robin. This is my confusion, isnt the the note repeating exactly what it says right above it, or am I not getting something? Also, I'm running 5.0, is there any other changes I need to make in order to get this to work?
Path Selection Policy (PSP)
Round Robin PSP is not supported for LUNs mapped by RDMs used with shared storage clustering. If you chose to use Round Robin PSP with your storage arrays, or if the vSphere version in use defaults to Round Robin PSP for the array in use, you may change the PSP claiming the above RDM LUNs to another PSP. For more information, see Changing a LUN to use a different Path Selection Policy (PSP) (1036189).
Note: With native multipathing (NMP), clustering is not supported when the path policy is set to Round Robin. For more information, see vSphere MSCS Setup Limitations in the Setup for Failover Clustering and Microsoft Cluster Service guide for ESXi/ESX 4.x or ESXi 5.x.
Any help would be great. This confuses me
-MN