[redeye78]

I recently bought a Rev.B dual 2.0 G5 and I found that Tech Tool Pro does not startup from the disk (Version 4.0.2). So I partitoned my external LaCie drive with a bare bones 10.3.5 with Tech Tool Pro and Disk Warrior on it to do repairs from. I want to be able to have that vlume unmount at startup when not using it. Does annyone know how to do this?

[reader50]

Try this. Open a Terminal window, the Terminal application is in /Applications/Utilities/

type:
crontab -e (this opens the cron schedule for editing)
i (no Return key, this command puts you in Insert mode)
@reboot cd /Volumes ; umount -f volumename

Substitute the volume's real name for volumename. Remember to be case sensitive if this is under Panther or Tiger. Then type:
Escape key (this exits Insert mode)
:wq (saves the edited crontab and exits the editor)

You can quit Terminal now.

It should unmount the volume on each startup or reboot. Use at your own risk, it will forcibly unmount the volume even if something is writing to it at the time. If something is, you could end up with some disk damage to the volume in question. Check it after a few tries, see if it has any damage.

Edited for clarity

[redeye78]

I wanted to be sure how to get the exact volume name for the drive. Also, is there a way to undo this comand if it does not work the way I want it to?

[Turnpike]

to undo it, simply edit the crontab again and remove the line you added

[reader50]

The Finder already displays the volume's real name. Select a volume's name (not the icon, the name below the volume's icon) in the Finder, then choose Copy from the Edit menu.

To remove the crontab, you follow much the same steps.

Open a Terminal window.

type:
crontab -e (this opens the cron schedule for editing)
i (no Return key, this command puts you in Insert mode)

(now move to the end of the line and Delete it all away)

Then type:
Escape key (this exits Insert mode)
:wq (saves the edited crontab and exits the editor)

You can quit Terminal now.