Managing HP Serviceguard A.12.00.00 for Linux, June 2014

5.1.12.6 Testing the Shared Configuration
When you have finished the shared volume group configuration, you can test that the storage is
correctly sharable as follows:
1. On ftsys9, activate the volume group, mount the file system that was built on it, write a file
in the shared file system and look at the result:
vgchange --addtag $(uname -n) vgpkgB
NOTE: If you are using the volume-group activation protection feature of Serviceguard for
Linux, you must use vgchange --addtag to add a tag when you manually activate a volume
group. Similarly, you must remove the tag when you deactivate a volume group that will be
used in a package (as shown at the end of each step).
Use vgchange --addtag and vgchange --deltag only if you are implementing
volume-group activation protection. Remember that volume-group activation protection, if used,
must be implemented on each node.
Serviceguard adds a tag matching the uname -n value of the owning node to each volume
group defined for a package when the package runs; the tag is deleted when the package
is halted. The command vgs -o +tags vgname will display any tags that are set for a
volume group.
vgchange -a y vgpkgB
mount /dev/vgpkgB/lvol1 /extra
echo ‘Written by’ ‘hostname‘ ‘on’ ‘date‘ > /extra/datestamp
cat /extra/datestamp
You should see something like the following, showing the date stamp written by the other
node:
Written by ftsys9.mydomain on Mon Jan 22 14:23:44 PST 2006
Now unmount the volume group again:
umount /extra
vgchange -a n vgpkgB
vgchange --deltag $(uname -n) vgpkgB
5.1 Preparing Your Systems 159