按照论坛里的教程：
1) 删除TF卡所有分区
2) 将uboot写入到sd卡8k偏移处(必须8K偏移, brom龟腚的)。
sudo dd if=u-boot-sunxi-with-spl.bin of=/dev/sdX bs=1024 seek=8
3) 建立第一个分区,大小32M(可以随意填写), 格式FAT16, 把zImage, sun8i-v3s-licheepi-zero-dock.dtb拷贝到 这个分区
4) 建立第二个分区，用尽剩余空间,格式ext4, 把buildroot产生的rootfs.tar解压到该分区根目录
tar xvf output/images/rootfs.tar -C /挂载的tf卡第二个分区目录
在V3S ZERO开发板上运行后，出现如下情况：
[ 1.391582] EXT4-fs (mmcblk0p2): couldn't mount as ext3 due to feature incompatibilities
[ 1.401860] EXT4-fs (mmcblk0p2): couldn't mount as ext2 due to feature incompatibilities
[ 1.552817] EXT4-fs (mmcblk0p2): warning: mounting fs with errors, running e2fsck is recommended
[ 1.567509] EXT4-fs (mmcblk0p2): recovery complete
[ 1.577550] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[ 1.585719] VFS: Mounted root (ext4 filesystem) on device 179:2.
[ 1.594166] devtmpfs: mounted
[ 1.598397] Freeing unused kernel memory: 1024K
[ 1.613776] Starting init: /sbin/init exists but couldn't execute it (error -5)
[ 1.623757] Starting init: /bin/sh exists but couldn't execute it (error -5)
[ 1.630930] Kernel panic - not syncing: No working init found. Try passing init= option to kernel. See Linux Documentation/admin-guide/init.rst for guidance.
[ 1.645087] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.13.16-licheepi-zero #1
[ 1.652298] Hardware name: Allwinner sun8i Family
[ 1.657036] [<c010e514>] (unwind_backtrace) from [<c010b1b8>] (show_stack+0x10/0x14)
[ 1.664779] [<c010b1b8>] (show_stack) from [<c065e5a4>] (dump_stack+0x88/0x9c)
[ 1.672001] [<c065e5a4>] (dump_stack) from [<c011b48c>] (panic+0xdc/0x248)
[ 1.678875] [<c011b48c>] (panic) from [<c06700ec>] (kernel_init+0x100/0x110)
[ 1.685919] [<c06700ec>] (kernel_init) from [<c0107538>] (ret_from_fork+0x14/0x3c)
[ 1.693492] Rebooting in 5 seconds..
板子启动不了？是什么情况？
如果把第二步改一下：
4) 建立第二个分区，大小100M,格式ext4, 把buildroot产生的rootfs.tar解压到该分区根目录
tar xvf output/images/rootfs.tar -C /挂载的tf卡第二个分区目录
第二个分区改成100M，就可以正常启动。200M就不行了，是什么问题呢？
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https://whycan.cn/t_561.html
按照这个论坛做的，目前不知道该如何解决问题
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第二个分区100M可以，大于100M就不行了
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论坛里说sudo解压缩rootfs，明天我试试
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