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Message from discussion Creating a bootable Firewire disk - how many bootable partitions?
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Mike Lindsay  
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 More options Oct 31 2007, 1:20 pm
Newsgroups: comp.sys.mac.system
From: Mike Lindsay <h...@possibly.net>
Date: Wed, 31 Oct 2007 12:20:33 -0500
Local: Wed, Oct 31 2007 1:20 pm
Subject: Re: Creating a bootable Firewire disk - how many bootable partitions?
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Here's a snippet of the  MacFixit article. It's hidden behind their
paywall but Google's cache revealed it as I was searching for info.

Quoting MacFixit

> Use Disk Utility (you can do this with Tiger) to repartition the drive.
> As you do the repartitioning, take great care to specify the correct
> partition scheme! If you're using a PPC machine, you want the Apple
> Partition Map (the default). If you're using an Intel machine (because
> you have no PPC machines), you want the GUID partition scheme; it is
> easy to neglect this step, and if you do, and you accidentally use APM,
> you won't be able to make a Leopard bootable disk. We suggest three
> partitions:
>           o A 10 GB partition to hold the clone of the Leopard DVD.
>           o A 30 GB partition to hold the Leopard system.
>           o All the rest to hold Time Machine backups.
>     *

>       As described in the earlier tutorial, insert your Leopard
> installer DVD into the computer and make an image file from it. Now
> "restore" (clone) the image file to the first partition on the external
> firewire drive.
>     *

>       The first partition on the external firewire drive is now
> bootable: it is a clone of the installer DVD. So boot from it! The
> effect is just as if you had booted from the installer DVD: the
> installer will offer to install Leopard. Do an erase-and-install onto
> the second partition of the external firewire drive.

> At the end of the installation process, the installer will
> automatically reboot the computer from the Leopard system it just
> installed on the second partition of the external drive. You will have
> to go through the usual kerfuffle about creating an initial admin user,
> declining the opportunity to subscribe to .Mac, etc. When you're all
> done, you'll be running Leopard from an external drive.

I think that I'll just install the 10G partition, leaving the rest of
the drive for Time Machine. As Warren Oates pointed out, there are
sound reasons to have the installer DVD on a bootable partition.
(Faster installs on new internal drives?) I just can't rationalize the
30G partition given that I have two bootable internal drives - one
Leopard, one Tiger.

 
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