用U盘引导启动,挂在系统
查看当前文件卷
lvmdiskscan
/dev/ram0 [ 4.00 MiB]
/dev/ram1 [ 4.00 MiB]
/dev/sda1 [ 255.00 MiB]
/dev/mmcblk2p1 [ 511.00 MiB]
/dev/ram2 [ 4.00 MiB]
/dev/sda2 [ 28.56 GiB]
/dev/mmcblk2p2 [ 6.50 GiB]
/dev/ram3 [ 4.00 MiB]
/dev/mmcblk2boot0 [ 4.00 MiB]
/dev/mmcblk2boot1 [ 4.00 MiB]
创建emmc文件夹
mount /dev/dev/mmcblk2p2 /emmc
emmc即原系统文件夹根目录
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