3 Replies Latest reply: Jun 25, 2006 10:30 AM by Kappy
captainbrendo Level 1 Level 1 (50 points)
I'm wondering what the Options button in the disk utility actually does.

When I click on a hard drive then click on partition, and the press the options button, I am presented with three options: GUID partition table, apple partition map and master boot record.

What do each of these do? I am trying to put to format my new eSATA enclosure work fast with my MBP in OSX as well as windows. Ideally I'd like to format it with HFS+ and NTFS.

MacBook Pro 2.0 GHz 2GB RAM 100GB 7200 RPM, Mac OS X (10.4.6)
  • Kappy Level 10 Level 10 (255,715 points)
    In order to make a bootable disk for an Intel Mac you must select the GUID partition map option. Once partitioned you format the drive using Mac OS Extended (Journaled.) If you intend to install Boot Camp, then you should use the Boot Camp software to create the Windows partition. If you make the Windows partition with Disk Utility, then you can not remove the partition without re-partitioning the drive with Disk Utility. If you use the Boot Camp software then you can also use it to remove the Windows partition if you decide to at a later date.

    Most if not all this info is available if you read the MBP User Guide and the user guide PDF that accompanies the Boot Camp software. Use Disk Utility Help from the DU Help menu to find out about all of DU's options. This is what documentation is for. Consult the documentation before you post questions here.
  • rpMac Level 1 Level 1 (0 points)
    ...Use Disk Utility Help from the DU Help menu to find out about all of DU's options. This is what documentation is for. Consult the documentation before you post questions here...

    Kappy,
    Where can we find the updates for the help files?

    I searched through the Disk Utility Help and Mac Help, however could not find any information about the format types and options available through the Disk Utility.

    The documentation on your system must be more detailed than the one on my system.
  • Kappy Level 10 Level 10 (255,715 points)
    Open DU help from DU's Help menu. Search on "partition" and select the first option in the list. In the blue box of steps look at Step 7. It states that to make a bootable disk for Intel Macs you must select the GUID option.

    More detailed info is in this KB article: http://docs.info.apple.com/article.html?artnum=303220.