eMMC or SD card how to distinguish My Ubuntu system has both an eMMC and a SD-card. Heres how to find out which one is which: $ dmesg | grep -e "mmc.*address" [ 7.185283] mmc0: new HS200 MMC card at address 0001 [ 7.989843] mmc1: new ultra high speed SDR50 SDHC card at address 0001 So mmc0 is a MMC / eMMC drive, and mmc1 is a SD / SDHC card. A bit nicer formatting: $ dmesg | grep -e "mmc.*address" | awk { print $3 " " $(NF-4) " " $(NF-5) } mmc0: MMC HS200 mmc1: SDHC SDR50 More details are in the linux kernel file bindings/mmc/mmc.txt: $ curl -s https://raw.githubusercontent.com/torvalds/linux/master/Documentation/devicetree/bindings/mmc/mmc.txt | grep "is supported" > mmc-supported.txt $ cat mmc-supported.txt - cap-sd-highspeed: SD high-speed timing is supported - cap-mmc-highspeed: MMC high-speed timing is supported - sd-uhs-sdr12: SD UHS SDR12 speed is supported - sd-uhs-sdr25: SD UHS SDR25 speed is supported - sd-uhs-sdr5...