Wiping Old HD

I'm trying to "wipe clean" my old G4 HD before selling it. I reboot from Disc 1, original installation disc. Select language. Go to Disk Utility. Select Erase and options are greyed out. Help! What do I do. I know just Erase won't do it.....

Select the Drive in the SideBar, at the right level...

Thanks for the reply.. The computer is sitting next to me...The Macintosh HD IS selected/highlighted but the options button is still grayed out.

Its a bit hard for me to see;-)
Sorry but I don't have an old G4 to give an exact instruction, and they have changed Disk Utility.

One entry is the Drive and within that is the Partition, if you've selected the Partition i.e. the one named Macintosh HD, then try the Drive which has the name "like" 1 TB ST31000528ASQ Media. See if that helps.

Also the Format needs to be OS X.

You could also try re-partitioning it and see if that enables the Security Settings...

If its older than that then check the Menus for more options.

Wow...you lost me there! You certainly know a lot..I've heard about partitions..but don't know anything about them. Does all that mean finishing the install and going into the HD to do something? You're dealing with a 71 yr old lady that was proud to have gotten this far! I know I don't want to go to Restore or First Aid. The Volume Format is Mac OS Extended(Journaled) and the Name is Macintosh HD. From what I read beforehand I think that is correct. The original system was 10. I do have the Tiger disk. Can I boot from that and get the Disk Utility? or do I need to get an application to wipe the computer of senesitvie data at this point?

You're doing fine!
Lets go back to the start, You Restarted the Mac with the DVD in the drive and held down the C key, right?

I restarted with the initial installation Disc 1 and held down the C key. I selected English as the language. Then I went to the menu bar and opened the Disk Utility. On DU I went to erase. There were 2 things to do Erase and Options. In the left hand column I selected Mac HD (other option was the install disc and two numbers that I think go with those) At that point only the Erase button was available. The other button that said options was grayed out...is all this making sense. I'm a novice at this....

PS When I select the Erase button which I cancel it says "Erasing a volume will destroy all information on the volume. It will not erase information on other volumes on the same disk. Are you sure you wish to erase the volume "Macintosh HD"?

Spot on!
Lets just click Erase, next.

Did that and it's spinning. I'm enamored with my new MacBook Pro and Lion! It beeps at me when I have an email. It's been a long way with me..I started out with system 6. something!