thanks for the response. We are looking to use a storage group per ESX Host and we will pre-provision as much of the storage and hosts as possbile to ensure the LUNs are added to all storage groups at the same time and recieve the same Host ID's but we are concerned that future additions may be difficult to ensure the Host IDs match up. From all of our testing it appears that if Datastores do not have the same Host ID accross ESX Host all cluster functionailty seems to be in tact, so we are just trying to find out if there other any other issues outside of RDM's that we should be concerned of regarding mis matched Host ID's for some LUNs.
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