If you download the Debian lvm tool package, an initscript should be installed for you.
If you are installing LVM from source, you will still need to build your own initscript:
Create a startup script in /etc/init.d/lvm containing the following:
| 
#!/bin/sh
case "$1" in
  start)
	/sbin/vgscan
	/sbin/vgchange -ay
        ;;
  stop)
	/sbin/vgchange -an
        ;;
  restart|force-reload)
	;;
esac
exit 0
             | 
Then execute the commands
| 
 # chmod 0755 /etc/init.d/lvm
 # update-rc.d lvm start 26 S . stop 82 1 .
             |