Upgrading a NetWare 6.5 SP8 cluster to Open Enterprise Server (OES) 2015 SP1 is a multi-phase process referred to as a rolling cluster conversion. This approach lets you keep your cluster up and running and lets your users continue to access cluster resources while the conversion is in progress. During a rolling cluster conversion, one server is converted to OES while the other servers in the cluster continue running NetWare. Then another server can be converted to OES, and then another, until all servers in the cluster have been converted. During the conversion, you can also add OES servers to the cluster, and remove NetWare servers from the cluster.
Before you begin a conversion, ensure that your system meets the requirements and caveats described in this section. In addition, your OES nodes and network environment must meet the cluster requirements as described in Planning for OES Cluster Services
in the OES 2018 SP2: OES Cluster Services for Linux Administration Guide.
Converting Nodes that Contain the eDirectory Master Replica or Certificate Authority
Failing Over Service Cluster Resources in Mixed-Mode Clusters
Using Novell Remote Manager to Manage the Cluster Is Not Supported in Mixed-Mode Clusters
Using ConsoleOne to Manage the Cluster Is Not Supported in Mixed-Mode Clusters
Using the Monitoring Function Is Not Supported in Mixed-Mode Clusters