digitando:
tail -f /var/log/message
compare:
Feb 1 14:27:58 localhost -- MARK --
Feb 1 14:47:58 localhost -- MARK --
Feb 1 15:07:59 localhost -- MARK --
Feb 1 15:27:59 localhost -- MARK --
Feb 1 15:47:59 localhost -- MARK --
Feb 1 16:07:59 localhost -- MARK --
Feb 1 16:27:59 localhost -- MARK --
Feb 1 16:47:59 localhost -- MARK --
Feb 1 17:07:59 localhost -- MARK --
Feb 1 17:27:59 localhost -- MARK --

dopodichè accendendo l'alimentazione del mio Hard Disk esterno USB, automaticamente su schermo si aggiungono le seguenti scritte:

Feb 1 17:40:05 localhost kernel: usb 4-1: new high speed USB device using address 2
Feb 1 17:40:06 localhost kernel: Initializing USB Mass Storage driver...
Feb 1 17:40:06 localhost kernel: scsi0 : SCSI emulation for USB Mass Storage devices
Feb 1 17:40:09 localhost kernel: Vendor: Maxtor 6 Model: Y080L0 Rev: 0 0
Feb 1 17:40:09 localhost kernel: Type: Direct-Access ANSI SCSI revision: 02
Feb 1 17:40:09 localhost kernel: SCSI device sda: 160086528 512-byte hdwr sectors (81964 MB)
Feb 1 17:40:09 localhost kernel: /dev/scsi/host0/bus0/target0/lun0: p1
Feb 1 17:40:09 localhost kernel: Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
Feb 1 17:40:09 localhost kernel: usbcore: registered new driver usb-storage
Feb 1 17:40:09 localhost kernel: USB Mass Storage support registered.
Feb 1 17:40:09 localhost usb.agent[6508]: usb-storage: loaded successfully
Feb 1 17:40:10 localhost scsi.agent[6557]: sd_mod: loaded sucessfully (for disk)

secondo te, cosa devo aggiungere nel file /etc/fstab ?
Te lo chiedo perchè ancora non ho ben chiaro il significato o l'uso di quest'ultimo.