WARNING: failed to detect canonical device of /dev/sda7

[forsubhi]

I have the following warning after execute this command

WARNING: failed to detect canonical device of /dev/sda7

http://img6.imagebanana.com/img/r12mxcum/Selection_021.png

and this is my /etc/fstab

http://img6.imagebanana.com/img/kzuinz5k/subhisudo_022.png


please help me cos I cannot do hibernate and I use kubuntu 11.10 !