[root@aee2 bin]# ./clear-some-important-data.sh /dev/sdb1 1
dd: error writing '/dev/sdb1': No space left on device
977661+0 records in
977660+0 records out
4004495360 bytes (4.0 GB, 3.7 GiB) copied, 409.491 s, 9.8 MB/s