Reading a partitioned drive with OS X Journaled file format

Discussion in 'Windows, Linux & Others on the Mac' started by LastLine, Sep 4, 2011.

  1. LastLine macrumors 65816

    Aug 24, 2005
    Hey all,

    I've got a flash drive with Lion installed on one partition set as OS X Journaled, and the second partition just as general storage (FAT) OS X reads the drive fine allowing access to both, but Windows 7 won't show either partition.

    Anyone got any ideas how to solve this? Obviously it'll never read the journaled partition but I would have expected it to read the FAT partition...
  2. AdrianK macrumors 68020

    Feb 19, 2011
    You may need to assign it a drive letter. Try this:

    • Right click on Computer, click manage
    • Chose the disk management snap-in
    • Find the partition in the diagram at the bottom
    • Right click, assign drive letter, click ok

    It should now appear in Computer.
  3. LastLine thread starter macrumors 65816

    Aug 24, 2005
    I'll try that in a bit - but this is consistent across a number of machines - would I have to do this on each machine?
  4. Quad5Ny macrumors 6502a

    Sep 13, 2009
    Are you using Windows XP or earlier? If so, it's possible your flash drive is using a GUID Partition Table and if it is WinXP cannot read that.

    • What you need to do is copy everything off the drive
    • Open Disk Utility
    • Remove and re-create all your partitions with a MBR Partition Table (Partition Tab>Options>MBR)
    • Copy your data back
    Also for flash drives I would used "Mac OS X Extended" instead of "Mac OS X Extended (Journaled)".


    If this doesn't work post back and well mess around with diskpart in Windows.
  5. LastLine thread starter macrumors 65816

    Aug 24, 2005
    Windows 7. Can't avoid the GUID and Journaled as I want to be able to boot from it - it's only a pet project on a spare flash drive so worst case I don't boot from it...just be nice if I could :)
  6. Quad5Ny macrumors 6502a

    Sep 13, 2009
    Ah, your running Windows 7. That's very odd you can't see any of the volumes when plugging it in.

    Did you try what AdrianK said, are all your partitions listed for the drive in question?

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