View Source: ddNotes - Waikato Linux Users Group

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!! Erase a Harddrive (zero fill)
This command attempts to write a zero at every writable location on your hard drive.
Before using the command, I recommend triple checking that you are indeed erasing the correct harddrive!

*dd if=/dev/zero of=/dev/hda bs=1M

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!! Clone a Harddrive

Lets say that ''/dev/sda'' is the hdd we wish to clone, and that ''/dev/sdb'' is an empty drive that is to be used as the target.

* dd if=/dev/sda of=/dev/sdb bs=1M

Note : the destination harddrive should be equal or larger in size to the source harddrive.

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!! Clone a CD/DVD

* dd if=/dev/cdrom of=/here/is/a/path/mycdrom.iso

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!! How to backup and restore your [MBR]

!Including the partition table.

<verbatim>
Backup : dd if=/dev/sda of=/backup/mbr.bkp bs=512 count=1
Restore : dd if=/backup/mbr.bkp of=/dev/sda bs=512 count=1
</verbatim>

!Excluding the partition table (only the executable code area)

<verbatim>
Backup : dd if=/dev/sda of=/backup/mbr.bkp bs=446 count=1
Restore : dd if=/backup/mbr.bkp of=/dev/sda bs=446 count=1
</verbatim>

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Last edited on Saturday, June 9, 2007 11:34:10 am by BenStaz

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