例如我们要导出aboot分区,先用mount命令看分区的具体信息
......
/dev/block/bootdevice/by-name/system /system ext4 ro,seclabel,relatime,discard,data=ordered 0 0
/dev/block/bootdevice/by-name/userdata /data ext4 rw,seclabel,nosuid,nodev,relatime,discard,noauto_da_alloc,data=ordered 0 0
/dev/block/bootdevice/by-name/cache /cache ext4 rw,seclabel,nosuid,nodev,relatime,data=ordered 0 0
/dev/block/bootdevice/by-name/persist /persist ext4 rw,seclabel,nosuid,nodev,relatime,data=ordered 0 0
/dev/block/bootdevice/by-name/modem /firmware vfat ro,context=u:object_r:firmware_file:s0,relatime,uid=1000,gid=1000,fmask=0337,dmask=
则各分区的设备信息在/dev/block/bootdevice/by-name下面
进入/dev/block/bootdevice/by-name,用ls -l可以看出每个分区对应的设备名
lrwxrwxrwx root root 1970-01-01 08:00 aboot -> /dev/block/mmcblk0p18
用dd命令导出来
dd if=/dev/block/mmcblk0p18 of=/data/aboot
用adb pull出来