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Operating Systems AIX Normal VG to Enhanced Concurrent VG Post 302898894 by bakunin on Thursday 24th of April 2014 07:56:17 PM
Old 04-24-2014
What ibmtech told you is correct, just two things to add:

1. When you make changes to the VGs on one node you need to do a "learning import" of the respective VG on the other node:

Code:
importvg -L <vgname> <hdisk>

This needs to be done to synchronize VG information across nodes. Otherwise the next takeover might just fail.

2. For your VG to support ECC you need to have a storage underneath which supports concurrent access to the disks. Our old Clariion, for instance, did not.

I hope this helps.

bakunin
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cmrunnode(1m)															     cmrunnode(1m)

NAME
cmrunnode - run a node in a high availability cluster SYNOPSIS
cmrunnode [-v] [node_name...] [-t | -w none] DESCRIPTION
cmrunnode causes a node to start its cluster daemon to join the existing cluster. This command verifies the network configuration before causing the node to start its cluster daemon. To start a cluster on one of its nodes, a user must either be superuser(UID=0), or have an access policy of FULL_ADMIN allowed in the clus- ter configuration file. See access policy in cmquerycl(1m). Starting a node will not cause any active packages to be moved to the new node. However, if a package is DOWN, has its switching enabled, and is able to run on the new node, that package will automatically run there. If node_name is not specified, the cluster daemon will be started on the local node and will join the existing cluster. Options cmrunnode supports the following options: -v Verbose output will be displayed. -t Test only. Provide an assessment of the package placement without affecting the current state of the nodes or packages. The -w option is not required with the -t option as -t does not validate network connectivity, but assumes that all the nodes can meet any external dependencies such as EMS resources, package subnets, and storage. node_name... Start the cluster daemon on the specified node(s). -w none By default network probing is performed to check that the network connectivity is the same as when the cluster was configured. Any anomalies are reported before the cluster daemons are started. The -w none option disables this probing. The option should only be used if this network configuration is known to be correct from a recent check. RETURN VALUE
cmrunnode returns the following value: 0 Successful completion. 1 Command failed. EXAMPLES
Run the cluster daemon on the current node: cmrunnode Run the cluster daemons on node1 and node2: cmrunnode node1 node2 AUTHOR
cmrunnode was developed by HP. SEE ALSO
cmquerycl(1m), cmhaltcl(1m), cmhaltnode(1m), cmruncl(1m), cmviewcl(1m), cmeval(1m). Requires Optional Serviceguard Software cmrunnode(1m)
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