如题，下面是代码
dev_mount sdcard /storage/extSdCard auto /devices/platform/sprd-sdhci.0/mmc_host/mmc1
#dev_mount internal /storage/sdcard0 19 /devices/platform/sprd-sdhci.3/mmc_host/mmc0
#dev_mount sdcard /storage/sdcard1 auto /devices/platform/sprd-sdhci.0/mmc_host/mmc1
