D:\>adb shell df
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 2971936 788 2971148 1% /dev
tmpfs 2971936 0 2971936 0% /mnt
/dev/block/dm-0 4499312 3794648 688280 85% /system
/dev/block/platform/bootdevice/by-name/userdata 114616900 8672548 105723168 8% /data
/dev/block/platform/bootdevice/by-name/cache 428488 5796 413848 2% /cache
/data/media 114420292 8893732 105526560 8% /storage/emulated
data 分区：=114616900*1024= 117.36G
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