On 26/08/2009, at 4:34 PM, James Devenish wrote:
Hi Peter,
2009/8/26 Peter Tomlinson <[email protected]>:
Regarding the formatting of drives does that include all external
drives?
Snow Leopard will continue to read and write external disks (and thumb
drives, etc.). The GUID partition issue is only relevant for disks
onto which you are installing Snow Leopard. This is because GUID
enables an Intel computer to boot using Snow Leopard. Since you are
using Time Machine for backups, this is not considered Installing Snow
Leopard for GUID purposes. If you ever needed to restore your
computer, you'd most likely to do so by booting from a Mac OS X
installation DVD, hence you don't need to reformat your Time Machine
disk. If on the other hand you were making a "live backup" directly
onto your external disk for booting in an emergency, the GUID rule
would presumably apply. (?)
James
Hi Peter & James,
My original post with the comment.
" !!! VERY IMPORTANT !!!
The computer you are going to install Snow Leopard on MUST be setup
with the GUID partitioning scheme."
Only refers to the Installation of Snow Leopard, nothing to do with
Time Machine.
Peter's Time Machine backup will still work in Snow Leopard.
You can't boot from a Time Machine backup, but if you boot from the
install DVD, you can restore your backup to another disk.
So, the only thing Peter cannot do is boot from the External Drive
that he has formatted in "Apple Partition Map" Scheme.
If he wanted a Bootable backup, he would need to use another External
Firewire Drive & format it "Mac OS Extended (Journaled)"
and "GUID Partition Table" Partition Map Scheme.
Then use either SuperDuper or Carbon Copy Cloner and create a bootable
backup of his system.
Well, that is how I understand how it works. Please correct me if I am
wrong in my understanding of Snow Leopard & Time Machine.
Cheers,
Ronni
17" MacBook Pro Intel Core 2 Duo
2.4 GHz / 4GB / 800MHz / 500GB
OS X 10.5.8 ... almost OS X 10.6
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