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

Discussion in 'Mac OS X Lion (10.7)' started by houkouonchi, Jun 22, 2012.

  1. houkouonchi macrumors regular

    Joined:
    Oct 31, 2005
    #1
    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.
     
  2. wrldwzrd89 macrumors G5

    wrldwzrd89

    Joined:
    Jun 6, 2003
    Location:
    Solon, OH
    #2
    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
     
  3. houkouonchi thread starter macrumors regular

    Joined:
    Oct 31, 2005
    #3
    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).
     
  4. wrldwzrd89 macrumors G5

    wrldwzrd89

    Joined:
    Jun 6, 2003
    Location:
    Solon, OH
    #4
    The OS version only makes a difference when one of the Macs comes with a custom build.
     

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