Mark, without guarantee ;-) I believe that the following method should work: 1. make sure that all 3 nodes are running and part of the cluster 2. stop qdiskd on all nodes (#service qdiskd stop) 3. create new quorum disk (#mkqdisk ...) 4. modify cluster.conf 5. #ccs_tool update /etc/cluster/cluster.conf 6. start qdiskd on all nodes (#service qdiskd start) Kind regards, Mark ----- bergman@xxxxxxxxxxxx wrote: > I've got a 3-node RHCS cluster and the quorum device is on a SAN disk > array that needs to be replaced. The relevent versions are: > > CentOS 5.6 (2.6.18-238.9.1.el5) > openais-0.80.6-28.el5_6.1 > cman-2.0.115-68.el5_6.3 > rgmanager-2.0.52-9.el5.centos.1 > > > Currently the cluster is configured with each node having one vote > and > the quorum device having 2 votes, to allow operation in the event of > multiple node failures. > > I'd like to know if there's any recommended method for changing the > quorum disk "in place", without shutting down the cluster. > > The following approaches come to mind: > > 1. Create a new quorum device (multipath, mkqdisk). > > Ensure that at least 2 of the 3 nodes are up. > > Change the cluster configuration to use the new path to > the new device instead of the old device. > > Commit the change to the cluster. > > 2. Create a new quorum device (multipath, mkqdisk). > > Ensure that at least 2 of the 3 nodes are up. > > Change the cluster configuration to not use any quorum > device. > > Commit the change to the cluster. > > Change the cluster configuration to use the new quorum > device. > > Commit the change to the cluster. > > 3. Create a new quorum device (multipath, mkqdisk). > > Change the cluster configuration to use both quorum > devices. > > Commit the change to the cluster. > > -------------------------------------------------- > Note: the 'mkqdisk' manual page (dated July 2006) > states: > using multiple different devices is currently > not supported > Is that still accurate? > -------------------------------------------------- > > Change the cluster configuration to use just the > new quorum device instead of the old device. > > Commit the change to the cluster. > > Thanks for any suggestions. > > Mark > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster -- Mark Hlawatschek ATIX Informationstechnologie und Consulting AG | Einsteinstrasse 10 | 85716 Unterschleissheim | www.atix.de http://www.linux-subscriptions.com -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
