tar -tf /dev/sr0

cpio -ivtB </dev/sr0

restore -if /dev/st0

# mt -f /dev/nst0 setblk 0

dd if=/dev/nst0 of=./testfile bs=128k count=1

# dd if=/dev/nst0 of=./testfile bs=128k count=1
1+0 records read
1+0 records written
32768 bytes (32 kiB) copied, 236 kiB/s

# dd if=/dev/nst0 of=./testtape.img bs=32k count=100
100+0 records read
100+0 records written
3276800 bytes (3 MiB) copied, 160 kiB/s
# file ./testtape.img
testtape.img: POSIX tar archive (GNU)