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Thread: Brand new MicroSD protected from writing

  1. #1
    Join Date
    Oct 2008
    Beans
    75
    Distro
    Ubuntu 12.04 Precise Pangolin

    Brand new MicroSD protected from writing

    Hi, I saw a few other threads on the subject, but none have a solution, so I decided to start from scratch.

    So, I have a MicroSD that works fine here. Then I decided to buy a new one, a SanDisk, and found out it was write-protected. I thought it was something of the manufacturer, so I bought another Kingston(just as the one I have and works fine), but it's also write-protected.

    This one that works is accessed through an SD adapter, and both others accuse protection, even though they're both new. I even tried them on Vista, but they can't be formatted either. And, yes, I've checked the "Lock" switch on the adapter.

    Here's the line on fstab for the SD cards:

    Code:
    /dev/mmcblk0p1	/media/sd	auto	user,exec,rw			0	0
    And here's what I got on dmesg for my working card and the two cards that don't work

    Code:
    [246217.464749] mmc0: new SDHC card at address 7f73
    [246217.466355] mmcblk0: mmc0:7f73 SD04G 3932160KiB 
    [246217.466755]  mmcblk0: p1
    [246242.240132] mmc0: card 7f73 removed
    [246267.275170] mmc0: new SD card at address 1234
    [246267.276535] mmcblk0: mmc0:1234 SA02G 1927168KiB (ro)
    [246267.285772]  mmcblk0: p1
    [246289.736124] mmc0: card 1234 removed
    [246339.929843] mmc0: new SD card at address 8fe4
    [246339.932760] mmcblk0: mmc0:8fe4 SU02G 1931264KiB (ro)
    [246339.933691]  mmcblk0: p1
    [246351.372138] mmc0: card 8fe4 removed
    In case you're wondering: card 7f73 is the working Kingston, card 1234 is the write-protected Kingston, and card 8fe4 is the SanDisk(also write-protected). Any attempts to writing or mkfs give me some error like "this filesystem is protected for writing", even if I do it as root. I also tried to change the user perissions to 777 after mounted, still no use.

    Any ideas?

  2. #2
    Join Date
    Oct 2008
    Beans
    75
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Brand new MicroSD protected from writing

    Bumping...

    Any ideas on how to bypass this weird protection?

  3. #3
    Join Date
    Oct 2008
    Beans
    75
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Brand new MicroSD protected from writing

    'Nother bump.

    Last time I had this problem, I used a USB adaptor and it worked. The problem, of course, is that I don't have a USB adaptor now, so I need a way to bypass this protection...

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