仅安装系统存储 我想启用并设置默认的手机存储：/ emmc @ fat 但是：
/devices/platform/mtk-msdc.0/mmc_host auto vfat defaults voldmanaged=sdcard0:emmc@fat,noemulatedsd
......无效：
init.mt6592.rc是：
on init
export LD_PRELOAD /system/lib/libxlog.so
export EXTERNAL_STORAGE /storage/emulated/legacy
export SECONDARY_STORAGE /storage/sdcard1
mkdir /mnt/shell 0700 shell shell
chmod 0750 /mnt/shell
chown shell sdcard_r /mnt/shell
mkdir /mnt/shell/emulated 0700 shell shell
mkdir /mnt/shell/emulated/0 0700 shell shell
mkdir /storage/emulated 0555 root root
mkdir /mnt/media_rw/sdcard1 0700 media_rw media_rw
mkdir /storage/sdcard1 0700 root root
export EXTERNAL_STORAGE /storage/emulated/legacy
export SECONDARY_STORAGE /storage/sdcard1
export EMULATED_STORAGE_SOURCE /mnt/shell/emulated
export EMULATED_STORAGE_TARGET /storage/emulated
# Support legacy paths
symlink /storage/emulated/legacy /sdcard
symlink /storage/emulated/legacy /mnt/sdcard
symlink /storage/emulated/legacy /storage/sdcard0
symlink /mnt/shell/emulated/0 /storage/emulated/legacy
[...]
# virtual sdcard daemon running as media_rw (1023)
service sdcard /system/bin/sdcard -u 1023 -g 1023 -l /data/media /mnt/shell/emulated
class late_start
service fuse_sdcard1 /system/bin/sdcard -u 1023 -g 1023 -w 1023 -d /mnt/media_rw/sdcard1 /storage/sdcard1
class late_start
disabled
service fuse_usbotg /system/bin/sdcard -u 1023 -g 1023 -d /mnt/media_rw/usbotg /storage/usbotg
class late_start
disabled
自定义rom的fstab.mt6592是：
# Android fstab file.
#<src> <mnt_point> <type> <mnt_flags and options> <fs_mgr_flags>
# The filesystem that contains the filesystem checker binary (typically /system) cannot
# specify MF_CHECK, and must come before any filesystems that do specify MF_CHECK
/emmc@android /system ext4 ro,commit=1,noauto_da_alloc wait
/emmc@usrdata /data ext4 noatime,nosuid,nodev,noauto_da_alloc,discard wait,check
/emmc@cache /cache ext4 noatime,nosuid,nodev,noauto_da_alloc,discard wait,check
/emmc@protect_f /protect_f ext4 noatime,nosuid,nodev,noauto_da_alloc,discard wait,check
/emmc@protect_s /protect_s ext4 noatime,nosuid,nodev,noauto_da_alloc,discard wait,check
/devices/platform/mtk-msdc.1/mmc_host auto auto defaults voldmanaged=sdcard1:auto
/devices/platform/mt_usb auto auto defaults voldmanaged=usbotg:auto
股票的fstab：
# Android fstab file.
#<src> <mnt_point> <type> <mnt_flags and options> <fs_mgr_flags>
# The filesystem that contains the filesystem checker binary (typically /system) cannot
# specify MF_CHECK, and must come before any filesystems that do specify MF_CHECK
/emmc@usrdata /data ext4 noatime,nosuid,nodev,noauto_da_alloc wait,check,encryptable=footer
/emmc@protect_f /protect_f ext4 noatime,nosuid,nodev,noauto_da_alloc wait,check
/emmc@protect_s /protect_s ext4 noatime,nosuid,nodev,noauto_da_alloc wait,check
/devices/platform/mtk-msdc.0/mmc_host auto ext4 noatime,nosuid,nodev,noauto_da_alloc voldmanaged=sdcard0:emmc@fat,noemulatedsd
/devices/platform/mtk-msdc.1/mmc_host auto vfat defaults voldmanaged=sdcard1:auto
/devices/platform/mt_usb auto vfat defaults voldmanaged=usbotg:auto
我可以使用这些东西安装/ emmc（手机存储）：
# Android fstab file.
#<src> <mnt_point> <type> <mnt_flags and options> <fs_mgr_flags>
# The filesystem that contains the filesystem checker binary (typically /system) cannot
# specify MF_CHECK, and must come before any filesystems that do specify MF_CHECK
/emmc@android /system ext4 ro,commit=1,noauto_da_alloc wait
/emmc@usrdata /data ext4 noatime,nosuid,nodev,noauto_da_alloc,discard wait,check
/emmc@cache /cache ext4 noatime,nosuid,nodev,noauto_da_alloc,discard wait,check
/emmc@protect_f /protect_f ext4 noatime,nosuid,nodev,noauto_da_alloc,discard wait,check
/emmc@protect_s /protect_s ext4 noatime,nosuid,nodev,noauto_da_alloc,discard wait,check
/emmc@fat /emmc ext4 noatime,nosuid,nodev,noauto_da_alloc,discard wait,check
/devices/platform/mtk-msdc.1/mmc_host auto vfat defaults voldmanaged=sdcard1:auto
/devices/platform/mt_usb auto vfat defaults voldmanaged=usbotg:auto
库存rom手机存储（/ emmc）是挂载 / storage / sdcard0
on init
export LD_PRELOAD /system/lib/libxlog.so
export EXTERNAL_STORAGE /storage/sdcard0
export SECONDARY_STORAGE /storage/sdcard1
on init
mkdir /mnt/media_rw/sdcard0 0700 media_rw media_rw
mkdir /mnt/media_rw/sdcard1 0700 media_rw media_rw
mkdir /storage/sdcard0 0700 root root
mkdir /storage/sdcard1 0700 root root
export EXTERNAL_STORAGE /storage/sdcard0
# Support legacy paths
symlink /storage/sdcard0 /sdcard
symlink /storage/sdcard0 /mnt/sdcard
symlink /storage/sdcard1 /mnt/sdcard2
[...]
# virtual sdcard daemon running as media_rw (1023)
service sdcard /system/bin/sdcard -u 1023 -g 1023 -d /data/media /storage/sdcard0
class late_start
service fuse_sdcard0 /system/bin/sdcard -u 1023 -g 1023 -d /mnt/media_rw/sdcard0 /storage/sdcard0
class late_start
disabled
service fuse_sdcard1 /system/bin/sdcard -u 1023 -g 1023 -w 1023 -d /mnt/media_rw/sdcard1 /storage/sdcard1
class late_start
disabled
service fuse_usbotg /system/bin/sdcard -u 1023 -g 1023 -d /mnt/media_rw/usbotg /storage/usbotg
class late_start
disabled