96 OES 2 SP2: Upgrading to OES—Planning and Implementation Guidenovdocx (en) 7 January 2010 High-speed Fibre Channel cards, cables, and switch or SCSI cards and cables need to beinstalled to connect the servers to the shared disk subsystem. If you are using a fibre channel SAN, the host bus adapters (HBAs) for each cluster nodeshould be identical. If you are using iSCSI for shared disk system access, make sure you have configurediSCSI initiators and targets prior to installing Novell Cluster Services. Novell Cluster Services software must be running on the OES server (SLES 10 and OES mustbe installed on every OES 2 SP2 server added to a cluster). You can install Novell ClusterServices and create a new cluster, or add a server to an existing cluster either during the SLES10/OES installation or afterwards, using YaST.See “Installing Novell Cluster Services during a OES 2 Linux Installation” and “InstallingNovell Cluster Services on an Existing OES 2 Linux Server” in the OES 2 SP2: Novell ClusterServices 1.8.7 for Linux Administration Guide."10.4 CaveatsThere are several caveats that you need to be aware of: Resources created on OES cannot run on NetWare. You cannot add additional NetWare nodes to your cluster after adding a new OES node orchanging an existing NetWare cluster node to an OES cluster node. If you want to addNetWare cluster nodes after converting part of your cluster to OES, you must first remove theOES nodes from the cluster. The server that holds the master eDirectory replica needs to be converted last, at the end of therolling cluster conversion, not first. You can't change existing shared pools or volumes (storage reconfiguration) in a mixedNetWare/OES cluster. If you need to make changes to existing pools or volumes, you musttemporarily bring down either all OES cluster nodes or all NetWare cluster nodes prior tomaking changes. Attempting to reconfigure shared pools or volumes in a mixed cluster cancause data loss.10.5 Rolling Cluster ConversionsPerforming a rolling cluster conversion from NetWare 6.5 to OES is one of the easier ways toupgrade Cluster Services to OES and keep your cluster up and running during the process.In this method, one server is converted to OES while the other servers in the cluster continuerunning NetWare 6.5. Then, as needed, other nodes can be converted to OES incrementally until allservers in the cluster have been converted. Although it is feasible to use a mixed NetWare and OEScluster temporarily as an upgrade strategy, Novell does not recommend it as a permanent productionimplementation.Refer to “Converting NetWare Cluster Nodes to OES 2 Linux (Rolling Cluster Conversion)” in theOES 2 SP2: Novell Cluster Services 1.8.7 for Linux Administration Guide for instructions onperforming a rolling cluster upgrade.
