Disk utility shows formatted drive as half full

Discussion in 'Mac OS X Lion (10.7)' started by ArmanUV, Aug 30, 2011.

  1. ArmanUV macrumors member

    Joined:
    Jul 15, 2010
    #1
    I wanted to add a partition to my 16GB USB flash drive today and I ran into a problem. Disk utility shows my just formatted drive as half full:

    [​IMG]

    The "Data" volume is completely empty in Finder. I tried deleting the volume and readding it but Disk utility still shows half of the drive in blue shade. Earasing free space also didn't work.
    When I try to add a new partition, it doesn't allow the original volume to shrink less than the presumed used space:
    [​IMG]

    Ideas?
     
  2. Peace macrumors Core

    Peace

    Joined:
    Apr 1, 2005
    Location:
    Space--The ONLY Frontier
    #2
    Are you putting Lion on it ?

    If so the "data" may well be the recovery partition.
     
  3. gr8tfly macrumors 603

    gr8tfly

    Joined:
    Oct 29, 2006
    Location:
    ~119W 34N
    #3
    I've noticed it with a USB flash drive too. It's just the blue graphic that seems off - the actual used vs. free numbers are correct.

    ----------

    The recovery partition won't be added until after Lion is installed, and then, only if it's actually installed on the drive - vs. restoring the installer DMG to it. It would also be invisible to Disk Utility (the partition won't show up at all - it's only about 650MB at that).
     
  4. ubergoober macrumors newbie

    Joined:
    Jul 24, 2011
    #4
    everythings fine. your wrong, its actually half empty.
     
  5. ArmanUV thread starter macrumors member

    Joined:
    Jul 15, 2010
    #5
    What flash drive are you using? the fact that I couldn't find similar reports on the net means that this is not a widespread issue.
     
  6. gr8tfly macrumors 603

    gr8tfly

    Joined:
    Oct 29, 2006
    Location:
    ~119W 34N
    #6
    They are Lexar Firefly 8GB.

    Sometimes, Disk Utility shows partitions and space used, out of proportion to their actual sizes. You can see this even on a HD if you have very small partitions on a large device.
     

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