Using Serviceguard Extension for RAC, 3rd Edition, May 2006

Maintenance and Troubleshooting
Managing the Shared Storage
Chapter 4 189
4. From node 1, use the vgchange command to deactivate the volume
group:
# vgchange -a n /dev/vg_ops
5. Use the vgchange command to mark the volume group as
unshareable:
# vgchange -S n -c n /dev/vg_ops
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.