# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda1 during installation
UUID=----------------- / ext4 errors=remount-ro 0 1
# swap was on /dev/sda5 during installation
UUID=------------------ none swap sw 0 0
/dev/sr0 /media/cdrom0 udf,iso9660 user,noauto 0 0
/var/lib/tftpboot/iso/win7/win7.iso /var/lib/tftpboot/iso-seven udf,iso9660 user,loop 0 0
/var/lib/tftpboot/iso/Mint/linuxmint-18.1-mate-32bit.iso /var/lib/tftpboot/images/mint/linuxmint-18.1-mate-32bit udf,iso9660 user,loop 0 0
/var/lib/tftpboot/iso/Mint/linuxmint-18.1-cinnamon-64bit.iso /var/lib/tftpboot/images/mint/linuxmint-18.1-cinnamon-64bit udf,iso9660 user,loop 0 0
/var/lib/tftpboot/iso/Mint/linuxmint-18.1-mate-64bit.iso /var/lib/tftpboot/images/mint/linuxmint-18.1-mate-64bit udf,iso9660 user,loop 0 0
/var/lib/tftpboot/iso/Mint/linuxmint-18.2-cinnamon-64bit.iso /var/lib/tftpboot/images/mint/linuxmint-test-cin4 udf,iso9660 user,loop 0 0
После 4 правила все последующие не монтируются, что не так?