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Getting Read Only File System errors on SD Card

4789 Views 13 Replies Latest reply: May 21, 2011 2:05 PM by eduardo84 RSS
roseytoys Calculating status...
Currently Being Moderated
Jan 16, 2011 12:55 PM
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 - I have tried to flip the switch a few times and there is no change. It is not the SD card as I purchased another new one - same thing happened.



Any ideas???
Mac OS X, Mac OS X (10.6.5)
  • Allan Eckert Level 8 Level 8 (39,485 points)
    Currently Being Moderated
    Jan 16, 2011 2:19 PM (in response to roseytoys)
    There is no PowerBook version of 10.6.5.

    10.6 id Snow Leopard and it runs in Intel processors. So if you have a laptop that is running 10.6.5, it must be a MacBook Pro and not a PowerBook since the pOwerBook had the PowerPC processor. Please correct your system information so that we can consider your problem.

    ___________________

    Allan
    tiger

    ___________________
    MacBook Pro, Mac Pro,, Mac OS X (10.6.6), 3.5 TB, iPhone 4, Nikon N80, D70 and D300 Nikon Coolscan 5000ED
  • Allan Eckert Level 8 Level 8 (39,485 points)
    Currently Being Moderated
    Jan 16, 2011 3:10 PM (in response to roseytoys)
    If you are referring to how to display an image as I do with my dancing Hobbes, I put it into my account on MobileMe with Apple and then use HTML to display it.

    ___________________

    Allan
    tiger

    ___________________

    Message was edited by: Allan Eckert
    MacBook Pro, Mac Pro,, Mac OS X (10.6.6), 3.5 TB, iPhone 4, Nikon N80, D70 and D300 Nikon Coolscan 5000ED
  • Allan Eckert Level 8 Level 8 (39,485 points)
    Currently Being Moderated
    Jan 16, 2011 8:10 PM (in response to roseytoys)
    The bottom line of the information pane for your SD card states that you only have read permission on the card. So as far I am concerned that explains why you can only read the card.

    If you want to write to you are probably going to have to reformat the card, which of course will wipe all data from the card.


    ___________________

    Allan
    tiger

    ___________________

    Message was edited by: Allan Eckert
    MacBook Pro, Mac Pro,, Mac OS X (10.6.6), 3.5 TB, iPhone 4, Nikon N80, D70 and D300 Nikon Coolscan 5000ED
  • ajduguid Level 3 Level 3 (650 points)
    Currently Being Moderated
    Jan 17, 2011 12:40 PM (in response to roseytoys)
    Okay, you're clearly comfortable at a Terminal so how about trying the following?

    diskutil list to get the list of devices

    after finding which one is the SD card (the previous command before and after insertion will give it away if the size of the device doesn't) you can use

    diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command)

    then the bit that I'm wondering about is

    sudo dd if=/dev/zero of=/dev/diskN bs=1m

    That, if the system will allow you, would wipe the SD card. I'm wondering if after you've unmounted the device if this read only quirk will vanish and allow you to wipe it.

    By the way, when you say it happened to a second card, was it the exact same sequence? you could write to the card before using it in the picture frame and then after that you couldn't?
    2.26GHz 13" MacBook Pro and Mac Mini, Mac OS X (10.6.5)
  • ajduguid Level 3 Level 3 (650 points)
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    Jan 17, 2011 1:27 PM (in response to roseytoys)
    So if cards are writeable in other devices then I can only assume some sort of hardware issue with the SD card reader on your mac, maybe some dust or something is getting in the way of however the machine reads the write switch? Do you have an Apple store nearby that you could take the machine in for them to look at?
    2.26GHz 13" MacBook Pro and Mac Mini, Mac OS X (10.6.5)
  • Morbidou Calculating status...
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    Feb 6, 2011 2:16 PM (in response to ajduguid)
    I do have the same problem until fewdays ago I could use my card reader to read and write on SD cards used in and formatted by different high end Canon and Nikon DSLR camera. But today all the SD cards that I put in the reader of my MacBook Pro works on a Read only status. I can write and reformat the cards only if I use a Card Reader via USB. And even that card formatted with disk utility cannot be reformatted or modified with the internal car reader. I just did and update to OS 10.6.6 on the 3rd of Feb. Could it be a problem with the uppdate?
    MacBook Pro, Mac OS X (10.6.6)
  • miketech1 Level 1 Level 1 (0 points)
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    Feb 12, 2011 9:39 AM (in response to roseytoys)
    same problem here. updated to 10.6.6 and no access to any sd cards. they are all read only. I am so tired of apple updates. They seem to break more than they fix.
    2010 Macbook Pro i7 15, Mac OS X (10.6.6), iMac iPhone
  • Peter Lorraine Level 1 Level 1 (15 points)
    Currently Being Moderated
    Mar 29, 2011 11:16 AM (in response to miketech1)
    I encountered this very same problem and later identified the problem as my own stupidity. The sd card holder I was using had a little slide switch on the side that serves as a write protect. I at first assumed I needed sudo - didn't work - then searched and found this thread. Then I pulled the card, saw the tiny slide switch on the side - flipped it - and problem solved. I hope the fix is as easy as this for you.

    Peter
    Macbook Air, Mac OS X (10.6.7)
  • eduardo84 Calculating status...
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    May 21, 2011 2:05 PM (in response to roseytoys)

    Unfortunately, this does not seem to be an isolated problem. I have an 8GB SD card that I was normally using on my iMac 27 (late 2009) and I decided to start using it on my Nikon D90 camera. After formatting the card in the camera and taking some pictures, it started to be recognized on my MacOS as read only.

     

    Since the problem also appeared on a digital photo frame, I think it has to do with MacOS interpreting that the photos are only to be copied from the card, so the user does not change the file system and ruin the card, making it unreadable to the camera later.

     

    Any suggestions? Have you seen something like that in the system?

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