我发出 dd 命令将我的硬盘清零。命令成功完成，但只有部分硬盘驱动器被覆盖：
mint@mint ~ $ sudo dd if=/dev/zero of=/dev/sda
dd: writing to ‘/dev/sda’: Input/output error
258416001+0 records in
258416000+0 records out
132308992000 bytes (132 GB) copied, 3741.09 s, 35.4 MB/s
下图显示了硬盘的配置：
mint@mint ~ $ sudo fdisk -l /dev/sda
Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes …