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user2024102 wrote:You can't add a server running OCFS v1.6 to a cluster with v1.2 nodes. You'd have to bring those nodes up to 1.4 at least, I believe. From the OCFS2 manual:
I want to add my new server (ocfs2 1.6) to the cluster (other 2 servers are 1.2) as well.
"OCFS2 1.4 is fully compatible with the 1.2 on-disk format. The newer version can mount volumes from the older version as-is. However, the network protocol is not compatible between the two versions. Concurrent mounts from nodes running the different versions are not supported."
This is true for 1.6 -> 1.2 as well. So you'd need to upgrade to 1.4 to get the new network protocol. However, from 1.4 we've made changes so that newer versions will be protocol compatible.