formatting a usb drive

Discussion in 'Mac Basics and Help' started by metalmini, Mar 24, 2010.

  1. metalmini macrumors newbie

    Joined:
    Mar 24, 2010
    #1
    Hi there guys.

    I am having the biggest trouble with a usb drive.

    A while ago i needed to format a usb drive to have a bootable linux image on it because a server at work didnt have a optical drive. So i had a big fight with my usb drive to make it bootable and at the end it all worked fine.

    Anyway now i need the usb drive and i cant write to it because its read only and diskutil doesnt let me do anything to it...

    Diskutil is telling me this about the drive:

    Format : ISO 9660 (Rockridge)

    How do i make my drive usable again? I googled the interweb but i cant seem to get a decent anwer on this topic, so i hope that you guys can help me out on this one :)

    Thanks in advance!
     
  2. MacDawg macrumors P6

    MacDawg

    Joined:
    Mar 20, 2004
    Location:
    "Between the Hedges"
    #2
    Can you post a screen capture of what it looks like when you select it in Disk Utility?
     
  3. bmcgonag macrumors 65816

    bmcgonag

    Joined:
    Mar 20, 2007
    Location:
    Texas
    #3
    Have you first tried teh 'Erase' function in DiskUtil? If not, try that, and set the format type to HFS+.

    Then go tot the Partition tab and change the dropdown from 'Current' to '1'... I know this seems redundant, but do it anyway...then Name the Partition to whatever you want, make sure the HFS+ is still selected, then Partition.

    If you want it to be writeable by Windows and Mac then use MS-DOS Fat.

    Brian
     
  4. metalmini thread starter macrumors newbie

    Joined:
    Mar 24, 2010
    #4
    The partition options are also all grey, i cant do anything :-(

    [​IMG]

    [​IMG]
     

    Attached Files:

  5. pcman2000 macrumors newbie

    Joined:
    Feb 21, 2010
    #5
    You can't write to it as it's read only. THis is strange as
    [​IMG]
    _______________________________It says "Unformatted" and "Read-Only"^^^^^^^^^^^^^

    BUt it is formatted...! (according to the sidebar...)

    I have no idea. :(
     
  6. metalmini thread starter macrumors newbie

    Joined:
    Mar 24, 2010
    #6
    And another thing, there is n hardware button to keep it read-only...
     
  7. xpected_one macrumors regular

    xpected_one

    Joined:
    Sep 23, 2008
    Location:
    Texas
    #7
    Does the USB stick have a lock/unlock toggle on the outside?? Some do? Just a thought?
     
  8. cderalow macrumors 6502

    cderalow

    #8
    obviously, set the hardware button to unlock, then repartition & format using diskutil
     
  9. metalmini thread starter macrumors newbie

    Joined:
    Mar 24, 2010
    #9
    Im sorry, n was no...

    So NO hardware buttons on this drive.
     
  10. bmcgonag macrumors 65816

    bmcgonag

    Joined:
    Mar 20, 2007
    Location:
    Texas
    #10
    Do you have access to a windows pc? If so, then try and use the Disk management tool on that to re-format the drive to Fat32, then do with it as you will.

    If not, then download gparted and burn the image as a live cd. boot from it with the stick installed in USB port already, then try to re-format / partition to Fat32. gParted is a great tool.

    Brian
     
  11. metalmini thread starter macrumors newbie

    Joined:
    Mar 24, 2010
    #11
    Ok you are saying that i need windows? Haha never thought i would hear that.

    So euhm.. Yea its all Mac over here, i will have to make a couple of calls, but i will try.

    Thanks man, i let you guys know after the weekend.
     
  12. bmcgonag macrumors 65816

    bmcgonag

    Joined:
    Mar 20, 2007
    Location:
    Texas
    #12
    Honestly, I don't know if Windows will work, but you could give it a try. I would recommnd Gparted over windows honestly, and you mac may boot of the live cd.
     
  13. metalmini thread starter macrumors newbie

    Joined:
    Mar 24, 2010
    #13
    Damn... Windows just made my day... but thank god, it crashed right after while doing all kinds of scans and stuff...

    So all is well and my usb drive is ready for operation again :)

    Thanks guys!!
     

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