When to use "no partition map"?

Discussion in 'Mac Basics and Help' started by ArthurDaley, Jun 5, 2008.

  1. ArthurDaley macrumors regular

    Joined:
    Feb 29, 2008
    #1
    I am creating a sparse disk image with disk utility. It offers various "partitions" - I am stuck between choosing "no partition map" and "Single Partition - GUID Partition MAP". Any idea what the former is used for?
     
  2. ArthurDaley thread starter macrumors regular

    Joined:
    Feb 29, 2008
  3. ArthurDaley thread starter macrumors regular

    Joined:
    Feb 29, 2008
    #3
  4. wrldwzrd89 macrumors G5

    wrldwzrd89

    Joined:
    Jun 6, 2003
    Location:
    Solon, OH
    #4
    A disk image is basically a virtual disk. Therefore, it has all the same capabilities a real disk has - including the ability to be partitioned. Therefore, no partition map should be used only if:
    1. You do not intend to partition the sparse image
    2. The sparse image is not intended to be used with Mac OS X Server for NetBoot purposes
    If either of the two cases (or both) are true, use GUID.
     
  5. ArthurDaley thread starter macrumors regular

    Joined:
    Feb 29, 2008
    #5
    Would it make sense (or even be possible) to partition a sparse image?
     
  6. wrldwzrd89 macrumors G5

    wrldwzrd89

    Joined:
    Jun 6, 2003
    Location:
    Solon, OH
    #6
    Yes, and yes - but most of the time there's little point in doing so.
     

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