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Does Lion use GUID's for doing disk detectiong/file system mounting?

H

houkouonchi

macrumors regular
Original poster
Oct 31, 2005
134
0
I know they use the GPT partition table but I was curious how it does the mount process.

The main thing I am asking about is. If I get a new macbook and do a machine -> machine clone over the network (dd + netcat over the network) will the other machine boot? Normally this would be a yes but if they are using GUID's then those will actually change even when block level mirroring the drive to a new machine.
 
wrldwzrd89

wrldwzrd89

macrumors G5
Jun 6, 2003
12,110
77
Solon, OH
houkouonchi said:
I know they use the GPT partition table but I was curious how it does the mount process.

The main thing I am asking about is. If I get a new macbook and do a machine -> machine clone over the network (dd + netcat over the network) will the other machine boot? Normally this would be a yes but if they are using GUID's then those will actually change even when block level mirroring the drive to a new machine.
Click to expand...
You're only guaranteed to boot via a network clone, regardless of GUID issues, in the following circumstances, for Macs:
  • Both Macs have the same build of (Mac) OS X on them
  • Both OS X versions are newer than the ones each Mac came with
  • Both Macs are CPU compatible (Intel vs PPC) and thus boot disk compatible (GPT vs APM)
If all 3 conditions are satisfied, you're highly likely to have success. An example situation which all 3 conditions are satisfied would be something like this:
  • Source Mac came with Leopard
  • Target Mac came with Snow Leopard
  • Both Macs are Intel
  • Both Macs are currently running Lion 10.7.4
 
H

houkouonchi

macrumors regular
Original poster
Oct 31, 2005
134
0
I guess I don't quite get why the OS version really matters (totally get the hardware though) cause you are writing the new OS on the clone.

Anyway these will be identical macbooks that I will be doing just from a linux boot disk + dd (so the OS won't be running at the time).
 
wrldwzrd89

wrldwzrd89

macrumors G5
Jun 6, 2003
12,110
77
Solon, OH
houkouonchi said:
I guess I don't quite get why the OS version really matters (totally get the hardware though) cause you are writing the new OS on the clone.

Anyway these will be identical macbooks that I will be doing just from a linux boot disk + dd (so the OS won't be running at the time).
Click to expand...
The OS version only makes a difference when one of the Macs comes with a custom build.
 
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