tefano@stefano-Aspire-1640Z:~$ sudo eject -t /dev/sr0 
[sudo] password for stefano: 
stefano@stefano-Aspire-1640Z:~$ dmesg | tail && mount
[   26.085024] sr 4:0:0:0: Attached scsi CD-ROM sr1
[   26.085136] sr 4:0:0:0: Attached scsi generic sg2 type 5
[   26.085452] sd 5:0:0:0: Attached scsi generic sg3 type 0
[   26.087215] sd 5:0:0:0: [sdb] Attached SCSI removable disk
[   45.138698] type=1400 audit(1441488417.253:49): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=2025 comm="apparmor_parser"
[   45.138716] type=1400 audit(1441488417.253:50): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=2025 comm="apparmor_parser"
[   45.139546] type=1400 audit(1441488417.253:51): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=2025 comm="apparmor_parser"
[   81.198315] PPP BSD Compression module registered
[   81.235877] PPP Deflate Compression module registered
[ 1023.326753] perf samples too long (2502 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
/dev/sda10 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/cgroup type tmpfs (rw)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755)
none on /sys/fs/pstore type pstore (rw)
systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,user=stefano)