Showing posts with label Lock disk. Show all posts
Showing posts with label Lock disk. Show all posts

Wednesday, 23 November 2011

LOCK disk Initialization in MC service Guard

To find a LOCK disk /LOCK VG in cluster:

#grep LOCK /etc/cmcluster/cmclconfig.ascii

FIRST_CLUSTER_LOCK_VG /dev/vgcllock
FIRST_CLUSTER_LOCK_PV /dev/dsk/c2t0d1

(OR)

Run the below command

# cmviewconf | grep –e "Node name" –e lock

flags: 12 (single cluster lock)
first lock vg name: /dev/vglock
second lock vg name: (not configured)
Node name: node1
first lock pv name: /dev/dsk/c0t4d4
first lock disk interface type: c720
Node name: node2
first lock pv name: /dev/dsk/c0t5d4
first lock disk interface type: c720

====================================================

IF you dont have the vgcfgbackup then how to initialize the lock disk again in cluster
(or)

How to reinitialize the cluster lock disk(s) using cmapplyconf:

• Halt the entire cluster.
# cmhaltcl –f


• Perform the following command from all nodes in the cluster to remove the cluster
flag from cluster lock VG(s).
# vgchange –c n


• Activate cluster lock VG(s) on one node only:
# vgchange –a y

• Perform cmapplyconf on the node where you activated the cluster lock VG(s). The
cluster flag is added back to the VG automatically.
# cmapplyconf –C

• Perform vgcfgbackup to backup the cluster lock information:
# vgcfgbackup

• Deactivate cluster lock VG(s):
# vgchange –a n

• Run vgcfgbackup on all other cluster nodes also:
# vgchange –a r
# vgcfgbackup
# vgchange –a n

• Restart the cluster:
# cmruncl