mount again

[coolcode]mount xxx.xxx.xxx.xx:/home/user/data /mnt/nfs -o nolock
umount -f /mnt/nfs[/coolcode]

1. create .iso from cdrom

cp /dev/cdrom /home/user/aaa.iso

2. create .iso from directory

mkisofs -r -J -V mylabel -o /home/user/aaa.iso /home/user/data

3. mount .iso

mkdir /mnt/vcdrom

mount -o loop -t iso9660 /home/user/aaa.iso /mnt/vcdrom