dave79 said:
Thanks for that.
But how do I format the drive once I'm in Disk Utility?
This deals with zeroing a drive but formating is the same procedure
You cannot erase the startup disk. To zero what is normally the startup disk, start up from a Mac OS X 10.2.3 or later CD, or from a second hard drive.
Note: This refers to a full Mac OS X 10.2.3 or later CD included with a computer, not to the update-only 10.2.3 CD.
If you do not have access to an appropriate CD or to another hard drive, there are other alternatives. If you have a Mac OS 9 CD with a System Folder and a computer that can start up from it, you may use Drive Setup on that CD. When in Drive Setup, choose Functions > Initialization Options to locate the zero all data option. If the computer to be erased can go into target disk mode, you may connect it in that state to another computer and zero it as a non-startup drive.
Steps for zeroing data
These steps assume you have a Mac OS X 10.2.3 or later CD:
1. Insert the Mac OS X CD.
2. Restart the computer.
3. Immediately after the startup sound, press and hold the "C" key to start up from CD.
4. When the Installer screen appears, do not click Continue. Instead, choose Installer > Open Disk Utilities.
5. Select the hard drive to erase.
6. Click the Erase tab. Click the format instead
7. Select the volume format from the Volume Format pop-up menu.
8. Click Options.
9. Select the checkbox for "Zero all data".
10. Click OK.
11. Click Erase.