NUMSLOTS=5
FIRSTSLOT=2

CHANGER=/dev/pass0
TAPEDRIVE=/dev/sa1
TAPE=1 # Tapelaufwerk (0-1 hier) 

MTXCHANGER=/usr/local/sbin/mtx
MT=/usr/bin/mt

SLOTS=`jot ${NUMSLOTS} ${FIRSTSLOT} ${NUMSLOTS}`

# or you could this: provided by Marcin Haba
# SLOTS=`${MTXCHANGER} ${CHANGER} list | awk -F ':' '{print $1}'`

# unload any existing tape


for slot in ${SLOTS}
do
  echo ${slot}
  # load
 ${MTXCHANGER} -f ${CHANGER} load ${slot} ${TAPE}

  # erase
  ${MT} -f ${TAPEDRIVE} erase
  ${MT} -f ${TAPEDRIVE} offline

  # unload
  ${MTXCHANGER} -f ${CHANGER} unload ${slot} ${TAPE}
done