Erasing a Hard Drive

Hi,

1. Insert the Mac OS X Install disc that came with your computer, then restart the computer while holding the C key.

2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)

*Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*

3. Click the Erase tab.

4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.

5. Select your Mac OS X volume.

6. Highlight the drive, select Partition Tab, then Format type... MacOS Extended Journalled, select the Security Options button, choose Zero Out Data, Erase... after completion do a new install.

How to format your disks...

http://www.kenstone.net/fcp_homepage/partitioning_tiger.html

Thanks to Pondini, Formatting, Partitioning, Verifying, and Repairing Disks...

http://Pondini.org/OSX/DU.html

If it is not the volume with your OS on it you can select it in Disk Utility and erase it.

That's true I've done this method in the past.