上周做了个很乌龙的事情，我本来是想bash dd if=debian-xxx.iso of=/dev/sdb bs=1 count=1024 结果敲成成```bash
dd if=debian-xxx.iso of=/dev/sda bs=1 count=1024
/dev/sda appears to contain a iso9660 filesystem which isn’t known to reserve space for DOS-style boot. Installing GRUB there could result in FILESYSTEM DESTRUCTION if valuable data is overwritten by grub-setup (–skip-fs-probe disables this check, use at your own risk)