Getting Read Only File System errors on SD Card

Discussion in 'Mac Basics and Help' started by globalnerds, Jan 14, 2011.

  1. globalnerds macrumors newbie

    Joined:
    Jan 14, 2011
    #1
    I copied a bunch of images onto and SD card (on my Mac), then used the SD card in a digital photo frame. I wanted to add some more pictures and received and error that the volume was read only. I am running a Power Book OS Version 10.6.5. The card is not locked. Here is everything I have tried so far - nothing below has worked:

    I have tried the following: Disk Utility - Restore button was greyed out. Then I tried the following commands:

    sudo chmod -RN /Volumes/....
    I received the following error messages (one per file in the volume):

    chmod: Failed to clear ACL on file IMG_0010.jpg: Read-only file system

    I then tried
    sudo chown -R USERNAME /Volumes/....
    I received the following error messages (one per file in the volume):

    chown: /volumes/Untitled/IMG_0011.jpg: Read-only file system

    It is an SD card where I put a bunch of images onto it for a digital picture frame. After putting it in the frame I wanted to add files to the SD card and this is what I get. No, the SD card is not locked.

    Any ideas???
     
  2. DewGuy1999 macrumors 68040

    DewGuy1999

    Joined:
    Jan 25, 2009
    #2
    What does Disk Utility say the format is on it?
     
  3. globalnerds thread starter macrumors newbie

    Joined:
    Jan 14, 2011
    #3
    MS DOS FAT - which is odd as the first time I used the SD card was on my mac. I don't care if I have to reformat it as I have all of the pictures that were on SD card on my mac.

    Thanks for your help.
     
  4. DewGuy1999 macrumors 68040

    DewGuy1999

    Joined:
    Jan 25, 2009
    #4
    Okay, FAT should be read/write on a Mac. NTFS is read only without using a 3rd party app.

    I don't use Terminal so most of the commands you posted above are "greek to me" but I did notice mention of "ACL" so, I Googled it to see what that was (I thought it was something to do with MS Windows) anyway, I found this, maybe it will make some sense to you and help out with this problem:

    OS X ACL usage

    P.S.: You mentioned you have a PowerBook and that you're running OS X 10.6.5 (Snow Leopard) that's not possible as a PowerBook is a PowerPC based Mac and Snow Leopard only runs on Intel based Macs.
     
  5. Dalton63841 macrumors 65816

    Dalton63841

    Joined:
    Nov 27, 2010
    Location:
    SEMO, USA
    #5
    For something like an SD card you should right click on the SD card drive, Get Info, and check ignore ownership.
     

    Attached Files:

  6. globalnerds thread starter macrumors newbie

    Joined:
    Jan 14, 2011
    #6
    Sorry, it is a Mac Book Pro not a power book. It is about 1 year old

    I have attached the info on the SD card.
     

    Attached Files:

  7. Knoodles macrumors 6502

    Knoodles

    Joined:
    Feb 2, 2003
    Location:
    Gone to the Beach
    #7
    Is there by any chance a very small slider switch on the SD card?
     
  8. globalnerds thread starter macrumors newbie

    Joined:
    Jan 14, 2011
    #8
    Yes there is, and it is not in the "locked" position.
     
  9. DewGuy1999 macrumors 68040

    DewGuy1999

    Joined:
    Jan 25, 2009
    #9
    Have you tried toggling the switch to the other position (irregardless of what it says) and trying it in your MBP? Can you change it from read only to read/write in the photo frame? Can you format it in the photo frame?
     
  10. globalnerds thread starter macrumors newbie

    Joined:
    Jan 14, 2011
    #10
    I have toggled the switch on the SD card. I cannot format it with the photo frame. It is odd, because before putting it in the photo frame (it was new) I was able to add pics, once I put it in the photo frame it became read only.
     
  11. DewGuy1999 macrumors 68040

    DewGuy1999

    Joined:
    Jan 25, 2009
    #11
    Are you using the MBP's built in SD card reader to read the card? Can you try it in another device that uses/reads SD cards?
     
  12. gatepc macrumors 6502

    gatepc

    Joined:
    Apr 11, 2008
    Location:
    Pittsburgh PA
    #12
    Had this happen to one of my SD cards it ended up being a precursor to a failing SD card. About a week after this started the card completely failed. I would back up your data that is on it now!
     
  13. usellis macrumors newbie

    Joined:
    Mar 30, 2011
    #13
    I finally figured it out, guys. Go to System Preferences / Sharing

    Select "File Sharing"

    The pane that appears will show "Shared Folders" and "Users"

    Click on the plus sign under "Shared Folders"

    A new window will appear, allowing you to add the SD card to the list.
     

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