[rescue] Mac Disk bootable
md.benson at gmail.com
Sat May 24 11:34:42 CDT 2008
On 24 May 2008, at 17:06, Joshua Boyd wrote:
> On May 24, 2008, at 2:55 AM, Jonathan C. Patschke wrote:
>> On Sat, 24 May 2008, Joshua Boyd wrote:
>>> Is it possible to run the bless command when booted from another
>>> harddrive? The name of the new disk is DA G4. I'm trying this
>>> command in Terminal.app while booted from another disk:
>> Is the disk partitioned with an Apple_Partition_Map as opposed to a
>> partition table or MBR?
> Since the drive was a pull from an iMac G5, I would have thought it
> would have had a Apple_Partition_Map (unless they stopped using that
> when they went to G5s).
PPC = APM
x86 = GUID
That's how partition maps pan out on Apple machines. I'm a bit fuzzy
about booting across platforms though, AFAIK Intel machines only
*boot* GUID and PPC only *boot* APM, because of what the firmwares are
setup to recognise. They will both *mount* both types once booted into
OS X however.
> I couldn't figure out how to check that, but I did figure out how to
> use diskutil to force that. The drive is now being copied over
> again, then I will try running bless again (although it still seems
> odd to me that CCC would state the copy will be bootable if I still
> have to run bless manuall), followed by actually retrying to boot
> from the drive.
In the OS X Disk Utility.app (accessible from either the boot DVD or
the OS) you can see at the bottom of the window when you select a
drive what partition map it has installed. A G5 iMac should have been
using APM. A friend of mine had issues, however, taking an APM
partitioned drive from another Mac and trying to use it as a boot
drive on a PowerMac G5, so there may be some voodoo between G5s and
other machines? Dunno for sure.
My advice would be if possible erase the entire drive, preferably
changing the partition map at the same time, in the G4 you are using
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