// Come si effettua un backup su cassetta in Linux

#!/bin/sh
# Script salvataggio dati

PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:.:~/batch
STATUS='mt -f /dev/st0 status'
BACKUP='tar czf /dev/st0 -b 8192'
N=0

while test $N -lt 10
do
	$STATUS | grep -q ONLINE
	if test $? = 0
	then
		echo ONLINE
		$BACKUP /etc /mnt/disk 
		echo COMPLETATO
		exit 0
	else
		echo ATTESA $N
		sleep 10
		N=`expr $N + 1`
	fi
done
echo TROPPA ATTESA BACKUP FALLITO
$STATUS
exit 1