Can't format usb flash drive - "permission denied"

Discussion in 'Mac Accessories' started by yarjarrar, Jul 28, 2009.

  1. yarjarrar macrumors member

    Joined:
    Jul 2, 2008
    Location:
    California
    #1
    The problem is when I put my 4gb flash drive in, the computer doesn't recognize it and doesn't show up on the desktop. So I go into Disk Utility and try to format it to maybe fix it that way, but when I try to, it says format failed, permission denied. Please help
     
  2. MisterMe macrumors G4

    MisterMe

    Joined:
    Jul 17, 2002
    Location:
    USA
    #2
    Thank you for not giving a clue which brand USB drive you are using. Information will only confuse our attempt to give you a wild guess.

    When I buy a new USB drive, I take it to a Windows computer and delete the U3 partition. If I want Windows-compatibility, then I reformat it as FAT32. If not, then I take it to my Mac and reformat it as HFS+.
     
  3. yarjarrar thread starter macrumors member

    Joined:
    Jul 2, 2008
    Location:
    California
    #3
    Well it's happened to two of my flash drives and they don't have any brand on them. One was a 16gb the other 8gb.
     
  4. geoffreak macrumors 68020

    geoffreak

    Joined:
    Feb 8, 2008
    #4
    We can't help you without knowing which flash drive you are using.
     
  5. yarjarrar thread starter macrumors member

    Joined:
    Jul 2, 2008
    Location:
    California
    #5
    In the information, it says:

    Name : USB 2.0 Flash Disk Media
    Type : Disk

    Partition Map Scheme : Unformatted
    Disk Identifier : disk1
    Media Name : USB 2.0 Flash Disk Media
    Media Type : Generic
    Connection Bus : USB
    USB Serial Number : 2008080814470981
    Device Tree : IODeviceTree:/PCI0/EHC1@1D,7
    Writable : Yes
    Ejectable : Yes
    Mac OS 9 Drivers Installed : No
    Location : External
    Total Capacity : 7.9 GB (8,493,465,600 Bytes)
    S.M.A.R.T. Status : Not Supported
    Disk Number : 1
    Partition Number : 0
     
  6. geoffreak macrumors 68020

    geoffreak

    Joined:
    Feb 8, 2008
    #6
    I picture would offer more help in identification than that list. There is nothing in there that could identify the drive.

    The drive is writable, so it appears as if it has been corrupted. Have you tried using another Mac or maybe a PC?
     
  7. yarjarrar thread starter macrumors member

    Joined:
    Jul 2, 2008
    Location:
    California

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