A DESTRUCTIVE command to render a drive unbootable

dd if=/dev/zero of=/dev/fd0 bs=512 count=1
Overwrites the boot sector. Since this doesn't overwrite any data, you can usually recover by re-creating the partition table exactly the same as before you zeroed it. This can also help sometimes if you install a new drive in a Windows machine which can't read it.

2
2009-09-09 23:43:22
dd

1 Alternatives + Submit Alt

  • THIS COMMAND IS DESTRUCTIVE. That said, lets assume you want to render your boot drive unbootable and reboot your machine. Maybe you want it to boot off the network and kickstart from a boot server for a fresh OS install. Replace /dev/fd0 with the device name of your boot drive and this DESTRUCTIVE command will render your drive unbootable. Your BIOS boot priority should be set to boot from HD first, then LAN.


    1
    badblocks -vfw /dev/fd0 10000 ; reboot
    SuperFly · 2009-09-04 16:57:51 0

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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