[X4U] Booting from external drive

[Jens Selvig]

Thanks to all who responded as many lights and bells went off in my  
head. I'll try the reformatting of the hard drive and see if that helps.

Jens


Jens Selvig
...lost in Montana...





On Aug 14, 2007, at 8:57 PM, Michael Elliott wrote:

> Jens
>
> Perhaps the drives aren't formatted correctly? Hard drives must be  
> formatted in a particular partitioning scheme, I believe called  
> GUID, to be used as boot drives on Intel Macs.  If you go into Disk  
> Utility and select your drive, you can then find the option in the  
> window (I can't remember where, but it's under the Erase or perhaps  
> reformat? tab/button--I'm typing on my MacBook, so it's not showing  
> up for my built-in hard drive, and I don't have an external hooked  
> up).  There are multiple partitioning schemes, one for PPC  
> machines.  That is why you can't use the hard drives you've been  
> using unless you repartition them using GUID.
>
> Once you do that, the hard drive will show up in the OSX installer  
> as a valid startup disk.
>
> Remember to back up all of your data from the external drive, as  
> the process of changing the partition scheme will erase it.
>
> Let us know if that works.
>
> Michael
>
>
> On Aug 14, 2007, at 6:02 PM, Jens Selvig wrote:
>
>> I decided I wanted to be able to make a bootable external hard  
>> drive for my MacPro. When I boot from the install CD, The  
>> Installer software says I am not allowed to install on any of the  
>> Firewire drives that are attached or the USB drive, either! I  
>> could install OSX on the second internal SATA drive.
>
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