# ./tape-src/amtapetype -f /dev/tape -e 300g
Writing 256 Mbyte   compresseable data:  29 sec
Writing 256 Mbyte uncompresseable data:  29 sec
Estimated time to write 2 * 307200 Mbyte: 69600 sec = 19 h 20 min
wrote 9830400 32Kb blocks in 100 files in 34297 seconds (short write)
wrote 9830400 32Kb blocks in 200 files in 34381 seconds (short write)
define tapetype unknown-tapetype {
    comment "just produced by tapetype prog (hardware compression off)"
    length 307200 mbytes
    filemark 0 kbytes
    speed 9160 kps
}