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I made gold card by this guide from my Samsung EVO plus SDHC. I formatted my card to FAT32. Then I inserted it into my Android Phone and through GoldCard Helper I got mmc2 reversed CID (SD Card Serial). Then, I downloaded my own gold card image (iso) by this website. Next, I launched HxD hex editor. I replaced/rewrote lines 00000000-00000170 (I think it is MBR, see this thread) on my SD card by all data in gold card image (iso).

Unfortunatelly, I probably made a mistake and the card is not working anymore on any OS. When I open diskmgmt.msc, it says "no media". Diskpart says same. Bootice says "ReadFile error". ReadFile error". TestDisk says "Read error" when running Quick Scan Analyse and can't found any partition. Minitool Partition Wizard Free says "bad disk" and show 2048 GB capacity (SD Card has 32 GB). Linux can't mount it. dmesg throw

error mmc0: error -110 whilst initialising sd card.

Android phone can't recognize the card too. My adapter is working fine when I insert other SD card.

I don't need data recovery, but I want access the card and use it. Is there a hope?

Thank you for help :).

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    Nope. But fortunately EVO cards have a ten-year warranty.
    – Ignacio Vazquez-Abrams
    Commented Dec 30, 2017 at 6:43
  • Rather than "this guide" you should describe what you actually did here. We prefer not to rely on external links as their contents may change or be removed. What did you actually do? Where did it fail? What happened? What is a "gold card"? Chances are though that the card is simply dead.
    – Mokubai ♦
    Commented Dec 30, 2017 at 7:09
  • Ok. I added details. I also searched about my problem and I think that SD card has corrupt MBR. Do you think it is possible?
    – Milan Pospíšil
    Commented Dec 30, 2017 at 8:30

1 Answer 1

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I'm guessing you have a badly mangled file system. The good news is you can't break it any more than you have. Any tool you use needs to ignore the filesystem you are using. Windows is a bit naff about stuff like that.

The SD card error smells like a red herring (yay!). Annoyingly it seems to be an obscure bug

Assuming its the filesystem, and you want to play it safe, consider trying to use DD to image the drive, just to see if it actually reads. dd dosen't care about the filesystem.

I'd try zeroing out the drive - dd or shred run on the device does the job. I've also found in a few situations, the official SD association SD card formatting tool might do the trick

If all else fails. contact Samsung and get it swapped under warranty as Ignacio's mentioned.

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  • Thanks for response. But Linux (Ubuntu) can't recognize my SD card. I can't see it with commands like lsblk or fdisk -l (there isn't any /dev/mmcblk0). Dmesg return "mmc0: error -110 whilst initialising SD card. Cannot verify signal voltage switch. lspci return for my SD card reader "Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0a). So, neither dd nor shred works :(
    – Milan Pospíšil
    Commented Dec 30, 2017 at 9:14
  • ehh. mmcblk was for embedded ones no? Coulda sworn the last time I trashed a card it was sdX
    – Journeyman Geek ♦
    Commented Dec 30, 2017 at 9:29
  • I assume that USB card readers are mounted as /dev/sd* and PCI card readers are mounted to /dev/mmcblk*. But I don't know it certainly.
    – Milan Pospíšil
    Commented Dec 30, 2017 at 10:35
  • From the error in dmesg, it would be mmc.... however it's utterly screwed.
    – djsmiley2kStaysInside
    Commented Dec 30, 2017 at 14:55

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