Finished with the backup, now I have to remove it...

The backup was finished tonight at 02:00 so it only took 12 hours instead of the projected 36. When I earlier today tried to install Tiger I noticed that the computer wouldn't boot from the DVD that I was given. It wasn't able to start the install icon from the mounted image under Leopard either.

To make this post a bit shorter the problem was:

1. Unable to boot from the DVD.
2. Unable to run the installation from the mounted file.
3. Unable to boot from my previous setup external hard drive.

The first of the problem I haven't found a way around, but fixing problem two removes the need to boot from the DVD:

After a dozen of forum pages I came across the solution in the middle of this post: http://forums.macrumors.com/showthread.php?t=443017 look for the post from Melee. I didn't manage to figure out how to insert the MacBook4,1 string and where he where refering to the GoodHardware but this post http://www.macosxhints.com/article.php?story=20071203051319476 made me try to run the OSInstall.mpkg directly and it worked.

Now the problem was however that I was unable to use my external hard drive as an installation drive since it was not using the GUID Partition Table scheme, which apparently wasn't the default when I split the drive into two partitions yesterday.

To fix this problem here are a short bullet list of what I did after I accepted that my previous backup would be lost:

1. Remove all partitions using the minus sign, using the erase option will create a new partition still hiding the option button.
2. Press the option button and select GUID Partition Table.
3. Partition as you like.
4. Ignore that the information at the bottom shows Apple Partition Table, what is in the Option dialog will be used once you accept the changes.
5. Press Accept and the drive is ready to use.
   

I have now installed Tiger onto the drive so it's time to restart and see if it works...