vold.fstab怎么修改让他支持OTG？

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#dev_mount sdcard /storage/sdcard1 auto /devices/platform/msm_sdcc.3/mmc_host
# modified by songxh For UMS Partiton begain
dev_mount sdcard /storage/sdcard0 29
/devices/platform/msm_sdcc.1/mmc_host/mmc0/mmc0:0001/block/mmcblk0
dev_mount sda /storage/UDiskA auto /devices/platform/msm_hsusb_host/usb2
dev_mount sdb /storage/UDiskB auto /devices/platform/msm_hsusb_host/usb2
dev_mount sdc /storage/UDiskC auto /devices/platform/msm_hsusb_host/usb2
dev_mount sdd /storage/UDiskD auto /devices/platform/msm_hsusb_host/usb2
dev_mount sde /storage/UDiskE auto /devices/platform/msm_hsusb_host/usb2
dev_mount sdf /storage/UDiskF auto /devices/platform/msm_hsusb_host/usb2
# modified by songxh For UMS Partiton end

在vold.fstab的末尾添加如下代码：

# usb otg diskdev_mount usbotg /mnt/usbotg auto /devices/platform/mt_usb /devices/platform/musbfsh_hdrc

①您可以尝试在所有系统盘目录下搜索此文件或者类似名称的文件。 ②您也可以尝试到百度贴吧此机型吧向其他root了手机的大神和机友求助分享此文件。 ③您还可以尝试使用其他相似配置的安卓机的此文件。（有一定的变砖风险）