LinuxQuestions.org - dd command for disk wipe

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fiosu

12-27-2012 02:07 AM

dd command for disk wipe

I would like to completely wipe all partitions and the master boot record and to make sure that the disk is zeroed out. I was looking around and see different variations of the dd command.

1. Is this the correct command to run?

Code:

sudo dd if=/dev/zero of=/dev/sda bs=1M

2. Will this erase the Master Boot Record?
3. What does each part of the command mean?
4. Would this command erase all of the drives on the PC?

Code:

sudo dd if=/dev/zero of=/dev/ bs=1M

Thanks!

syg00

12-27-2012 02:35 AM

There is an exceedingly long thread on the "dd" command - here. Skip down a page or so to "Linux DD".
Should answer all your questions, or at least fill in some blanks. Post back if still (or more ... :p) confused.

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