1 year, 8 months ago.

Mbed filesystem mount fails


I am using the platform Nucleo-f207zg, and currently trying to use an SD card.

I am running the https://github.com/ARMmbed/mbed-os-example-sd-driver example and it works with one of my SD cards which I have been using for a long time with my codes and even this example.

The first time I tried using this SD card I had a bad time, and now that I am trying with new SD cards, again a lot of problems. I already formatted the new cards with Mac OS disk utility and with Windows using the guide on https://github.com/ARMmbed/mbed-os-example-sd-driver.

The programs always deliver the same error

--- Mbed OS filesystem example ---
Mounting the filesystem... Fail :(
No filesystem found, formatting... Fail :(
error: Unknown error (-5005)

Does anyone have any suggestion?

1 Answer

1 year, 8 months ago.

Hello Jose,

    "config": {
        "UART_RX": "D0",
        "UART_TX": "D1",
        "DIO_0": "D0",
        "DIO_1": "D1",
        "DIO_2": "D2",
        "DIO_3": "D3",
        "DIO_4": "D4",
        "DIO_5": "D5",
        "DIO_6": "D6",
        "DIO_7": "D7",
        "DIO_8": "D8",
        "DIO_9": "D9",
        "SPI_CS": "D10",
        "SPI_MOSI": "D11",
        "SPI_MISO": "D12",
        "SPI_CLK": "D13",
        "I2C_SDA": "D14",
        "I2C_SCL": "D15",
        "AIN_0": "A0",
        "AIN_1": "A1",
        "AIN_2": "A2",
        "AIN_3": "A3",
        "AIN_4": "A4",
        "AIN_5": "A5",
        "AOUT" : "A5",
        "PWM_0": "D3",
        "PWM_1": "D5",
        "PWM_2": "D6",
        "PWM_3": "D9",
        "DEBUG_MSG": 0,
        "DEVICE_SPI": 1,
    "target_overrides": {
        "*": {
            "target.components_add": ["SD"],
            "sd.INIT_FREQUENCY": 350000

Hello Zoltan,

I already did as suggested and now it just stays forever mounting the fileSystem. I do have two 16GB Class 10 SD cards working, and the one that is not working is a default 8GB Kingston SD Card. I don't know if this has something to do...

Thank you for your time answering! I wonder what is wrong?

posted by Jose Marquez 28 Jun 2019