Booting from external: GUID partitioned, HFS+ (with FAT32 neighbor)

[k7lim]

hi all,

I can't seem to boot from the backup partition i just made on my external.

I'm on a Macbook Pro, and I partitioned using GUID. I have one 75GB HFS+ Partition (which I use SuperDuper to back up into), and allocate the remaining 220GB to a FAT32 so I can share files with my Windows machine.

http://secretdomainname.com/du1.png
http://secretdomainname.com/du2.png
http://secretdomainname.com/du3.png
http://secretdomainname.com/du4.png

I boot up with the drive plugged in, and nothing happens.
What am I doing wrong?

[dnanian]

What kind of drive is this? When you say "you boot with the drive plugged in", have you tried Option+Booting to see if it shows up as a choice?

[k7lim]

it's a Maxtor 320GB external USB2 drive.

oh i see, do i have to hold option to boot from an external? :)

[dnanian]

Yeah, hold down Option and then select the external from the list that appears. :)