booting from an external

[topgun072003]

Okay guys helps me out pleeease... Alright so I have an external hard drive and I was booting an os from there fine for about a week. Then I tried installing Tiger to this external drive, (in a different partition), but it won't boot up from it. I have gone to system pre> startup disk and selected it, but when I hit restart it shows this really small picture that looks like a finder then it just restarts from my internal hd. When I hold down option at startup it only shows my internal drive. Help me please!

 

[balamw]

More details. USB/FW? What's the partitioning, what's the other OS?

B

 

[topgun072003]

well its a g-drive q. I'm using a firewire 800. It worked great with the first operating system that I was booting from. That os is still in beta form btw. Anyway the other day I tried to put tiger on a different partition and since then it doesn't work. I can see the drives from the start up disk, but when I select them and hit restart it shows a finder with a question mark, and only boots up my internal.

 

[balamw]

You're not providing enough information for anyone to be able to help you by being coy about anything, and if you had Vista or Leopard on the external that might be part of the problem that could provide essential clues to solving the problem. (And also folks might like to know how you got Vista booting on an external )

Most likely the partition table you've got doesn't support booting OS X. I don't think Intel Macs support booting from MBR partitions. Only GPT.

B

 

[topgun072003]

Oh okay. I had Leopard running from one partition and it was working fine. Then the other day I tried to put tiger on another partition and since then neither has worked. I see each os when I go to sys pre> startup disk, but when I select any one it just shows a finder picture and then a question mark at start up. Then it just boots up from my internal drive. Sorry about not being specific. If there's anything else just ask. I just want to get this to work again.

oh I have a powerbook G4 1.67 Ghz.

 

[topgun072003]

does anyone know anything about this?