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You have overwritten the card's partition table. Most consumer embedded devices require a BIOS (PC) partition table, and I'll guess that your phone is such a device. My experience is with cameras; I guess that a phone is probably similar. I'll also assume, that unlike my cameras, the phone doesn't have a 'reformat memory card' action hidden in its menus ...


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I'm using Kubuntu 15.04, VirtualBox 4.3.26 This assumes that the sd card device is /dev/mmcbl0 , and the output .vdk will be sd-card.vmk : sudo VBoxManage internalcommands createrawvmdk -filename ./sd-card.vmdk -rawdisk /dev/mmcblk0 Not sure this is the best way to fix permissions, but it worked: sudo chmod 777 /dev/mmcblk0 sudo chmod 777 ./sd-card.vmdk ...


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This SD card is directly formatted as a single filesystem and does not actually have a partition table. What you are seeing is ordinary filesystem data where fdisk is expecting the master boot record to be and it's being confused by it. That's why the partition info you are seeing is nonsensical, yet the card still works. To wipe the card, type the ...


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If you want to wipe the disk, try this, either as root or preceded by sudo: sgdisk -Z /dev/sdb You should then be able to repartition the disk. If you can't, check the disk to see if it's got a read-only tab on it, as some (all?) SD cards do. If it's got such a tab, slide it to the other position and try again. If that fails, then my hunch is that the ...


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That's because Windows isn't able to read the filesystem on the card. Windows can only read FAT, NTFS, exFAT, Live File System filesystems. Linux, on the other hand, is able to read your card's filesystem, Windows filesystems and other just fine (Linux ftw). I assume that the filesystem on your card is ext*, so you can use this to install a driver for ...


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Just in case, I had the exact same problem (phone and devices could format but it didnt do anything) and it also didn't work with my usb adapter for windows. BUT it worked with another card reader on windows. With that device I was able to remove files and format.


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Run DISKPART from the Run menu or a command prompt. Use list disk to show the available disks. You should see the SD card listed. Pay attention to the size reported. If it shows the full size of the drive, then continue. If it only shows 30MB, then be warned, this procedure is not likely to erase the whole card, and physical destruction may be your only ...


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I'm not sure if an SD card cut in half would qualify for a refund/replacement. A more gentle way is to use a piezoelectric element from an old cigarette lighter. Click it a couple of times on each pin of the SD card, then put the card back to the card reader to verify its death. Repeat if the card is still detected.


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If you use Linux, you could try dd if=/dev/sdX of=/dev/null without mounting the card, where sdX is your SD card. This should just read the card itself without copying any actual data (/dev/null is a void device, a black hole of some sort), hence "refreshing" the bits inside the cells.



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