After creating volumes in rootdg to be used as additional swap and adding these to the /etc/vfstab file, an error message is displayed at boot time complaining about overlapping swap volumes.
Change the names of these volumes to read swap1, swap2, etc...
If you still get this message after making the above change, edit the /sbin/swapadd script. Find the line:
c=`$SWAP -l | grep -c '\\<'${special}'\>'`and change it to
=`$SWAP -l | grep -c ''${special}''`Also see bug number 1215062 for more information on this behavior.