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