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How come my SD and USB are mixed up?

Former Member

I have a 32 GB USB dongle and 32 GB SD.  My 32 GB SDHC does not show up but my USB 32GB shows as  32 GB but does not seem to influence the board, if you get my drift?

  • First helpful Info would be what OS you´re using.
    Android or Linux?

     

    Also do you insert them on the fly or do you reboot the board?

     

    For Linux I can say the SD Card won´t come up as /dev/sda1 or similar like the USB device but as /dev/mmcblk1.

     

    Also in Android I don´t think the card will come up without additional configuration.

     

    You may have to find out how to mount the card in Android or if the card is detected and you have an entry in the devices list.

  • Android or Linux ?? which OS ur using .

     

    In Linux it shows SD card as mmcblk device (ex: /dev/mmcblk0).

    below is snapshot of SDCARD device from /dev folder.

    image

     

    similarly USB would have shown as some ttyUSB device.

    below is snapshot of USB device from /dev folder.

    image

     

    The above entries must be there for the mounting to proceed.

     

     

    NOTE:

    Also check there is a Lock switch on the SD card. Make sure the slid is away from Lock.


    Thanks

    Tushar

  • If the device nodes are visible but not mounting automatically, try below manually procedure.

    type  df -T | grep mmc   in terminal

     

    it will show the SDCARD partitions as below .

    image

    From above we got the partitions file system type.

     

    so we can manually mount it using below commands:

    mount -t vfat  /dev/mmcblk0p1 /mnt/dir1

    mount -t ext4 /dev/mmcblk0p2 /mnt/dir2

     

    If no partitions are available use fdisk manually format and create partitions.

     

    plz check if the kernel must be compiled with CONFIG_MMC based options, just to make sure MMC block drivers are available.