MC/SG Clusterlock disk

[JOHN TURNER_2]

Morning, we are having trouble with the cluster lock disk on a three node servicenode cluster, Does anyone know how to change the clusterlock disk to a different disk. At present the system is reporting c16t0d0 and we want to change the clusterdisk to c3t0d0.

Any help would be appreciated

Cheers
John

[RAC_1]

There is tool that hp provides for this. Something as cminitlock or similar. another method would be shutdown cluster, update config file and pushing the changes to all nodes.

[Bernhard Mueller · Accepted solution]

John,

you cannot *move* the lock disk while the cluster is up and running. the cminitlock utility is only used for re-initializing a prevoiusly failed lock disk.

to change the lock disk and its vg you need to stop the whole cluster.

Regards
Bernhard

[Geoff Wild]

You need to re-apply the cluster config if you are changing the cluster lock.

cmgetconf cluster.ascii

vi cluster.ascii and set the cluster lock disk.

cmapplyconf -C cluster.ascii

Rgds...Geoff

[simon_164]

John,
same answer over here, shutdown the cluster and make the configuration then rebuild it.
try to run the packages on the third node. build the cluster with a different lock disk then readd the packages to the whole nodes. correct me if i'm wrong!! and submit me points if i'm right.

[Marco Santerre]

Thogh not completely helpful for this matter, I thought that a cluster lock disk had to be defined in the case where you had a two-node cluster, that any cluster with more than two-node could do without the cluster lock disk?

[Scott Dunkley]

your right but what happens if one node fails? He then has a two node cluster.

[Geoff Wild]

cluster lock supported up to 4 nodes....cluster quorom server needed for more then 4 nodes but also can be used for less then 4 node clusters.

Rgds...Geoff