Logical volumes not available on reboot.

Quick fix to bring logical volumes back online:
The "lvdisplay" command will show the status as "not available" to change the status you need to issue:

#lvchange -a y /dev/<volgroupname>

This will bring them back online.

I'm currently testing this workaround to fix the problem and make the lv's available at reboot:

http://www.linuxquestions.org/questions/linux-server-73/logical-volumes-not-available-on-reboot-724093/