Android系统启动时，用dmesg命令查看，  dmesg  > sd.txt


里面可以找到mmcblk1


<6> mmc1: slot status change detected (0 -> 1), GPIO_ACTIVE_HIGH
<6> mmc1: new high speed SDHC card at address 1234
<6> mmcblk1: mmc1:1234 SA08G 7.28 GiB 
<6>  mmcblk1: p1


mmcblk0是内置的emmc存储设备