Unable to spin down CD-ROM

I have an interesting issues today. My CD-ROM fail to spin down and there is a faulty disk inside the CD-ROM.

Inside the /var/log/messages

Buffer I/O error on device sr0, logical block 0 Error

There is no way you can un-mount the CDROM by the tradtional umount /dev/sr0. If you do a

# ps -afe|grep sr0
user1   11061  9280  0 12:43 pts/0 /sbin/blkid -o udev -p -u noraid /dev/sr0

To do a quick resolve, you can kill the process ID associated with /sbin/blkid -o udev -u noraid /dev/sr0

# kill -9 11061

The CD-ROM should stop spinning