Using Serviceguard Extension for RAC, 6th Edition, April 2008

6. Prior to making configuration changes, activate the volume group in normal
(non-shared) mode:
# vgchange -a y /dev/vg_ops
7. Use normal LVM commands to make the needed changes. Be sure to set the raw
logical volume device file's owner to oracle and group to dba, with a mode of
660.
8. Next, still from node 1, deactivate the volume group:
# vgchange -a n /dev/vg_ops
9. Use the vgexport command with the options shown in the example to create a
new map file:
# vgexport -p -m /tmp/vg_ops.map /dev/vg_ops
Make a copy of /etc/lvmpvg in /tmp/lvmpvg, then copy the file to
/tmp/lvmpvg on node 2. Copy the file /tmp/vg_ops.map to node 2.
10. Use the following command to make the volume group shareable by the entire
cluster again:
# vgchange -S y -c y /dev/vg_ops
11. On node 2, issue the following command:
# mkdir /dev/vg_ops
12. Create a control file named group in the directory /dev/vg_ops, as in the
following:
# mknod /dev/vg_ops/group c 64 0xhh0000
The major number is always 64, and the hexadecimal minor number has the format:
0xhh0000
where hh must be unique to the volume group you are creating. Use the next
hexadecimal number that is available on your system, after the volume groups
that are already configured.
13. Use the vgimport command, specifying the map file you copied from the
configuration node. In the following example, the vgimport command is issued
on the second node for the same volume group that was modified on the first node:
# vgimport -v -m /tmp/vg_ops.map /dev/vg_ops /dev/dsk/c0t2d0/dev/dsk/c1t2d0
14. Activate the volume group in shared mode by issuing the following command on
both nodes:
# vgchange -a s -p /dev/vg_ops
Skip this step if you use a package control script to activate and deactivate the
shared volume group as a part of RAC startup and shutdown.
154 Maintenance and Troubleshooting