warning message related to emmc

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warning message related to emmc

Unread postby bzb » Tue Jun 12, 2018 5:29 am

I using odroid xu4. connected with usb-uart to view odroid messages on host pc. I found the following warning message during odroid startup and would like to know if there is something wrong with my hardware...

minicom output...

U-Boot 2017.05 (Dec 11 2017 - 16:20:56 +0900) for ODROID-XU4

CPU: Exynos5422 @ 800 MHz
Model: Odroid XU4 based on EXYNOS5422
Board: Odroid XU4 based on EXYNOS5422
Type: xu4
DRAM: 2 GiB
MMC: EXYNOS DWMMC: 0, EXYNOS DWMMC: 1
MMC Device 0 (eMMC): 29.1 GiB
Info eMMC rst_n_func status = enabled
Card did not respond to voltage select!
mmc_init: -95, time 12
*** Warning - bad CRC, using default environment

In: serial
Out: serial
Err: serial
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Re: warning message related to emmc

Unread postby tobetter » Tue Jun 12, 2018 7:55 am

Can you attach your eMMC module to USB card reader and insert to your desktop to see if your eMMC shows a file system. If so, your eMMC would be fine. Or you could also reconnect eMMC module carefully.
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Re: warning message related to emmc

Unread postby odroid » Tue Jun 12, 2018 4:07 pm

I've seen the exactly same message with my Yellow eMMC modules.
Simply ignore the warning message.
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Re: warning message related to emmc

Unread postby crashoverride » Wed Jun 13, 2018 5:55 pm

The warning message in question comes from uboot:
https://github.com/hardkernel/u-boot/blob/88af53fbcef8386cb4d5f04c19f4b2bcb69e90ca/tools/env/fw_env.c#L1182
It means that the u-boot environment variable storage space is not initialized. This is normal unless the environment has been saved in uboot using the "saveenv" command. It does not indicate any kind of hardware failure.
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