备份Android设备的fastboot镜像

这篇文章教你备份现有设备的fastboot镜像，可以是手机，手表，电子书，甚至智能音响

优点是可以无视设备的可用空间，比如像手表的sdcard所在分区没有system大，以至于无法使用twrp备份system。以及备份的是image，还原之后可以过ota的md5验证

当然，也是有门槛的

一个拥有adb和fastboot支持的平台，电脑，路由器，另一个手机都可以(Windows请使用utf8的cmd)
adb工具（android-tools-adb）
fastboot工具（android-tools-fastboot）
设备已解锁拥有对应twrp或是已经root

使用twrp的情况#

将设备启动到fastboot并连接电脑
启动twrp，这里使用设备的twrp.img，如果要备份原厂recovery请别把twrp刷进去

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fastboot boot twrp.img

请看备份部分

设备已root的情况#

将设备启动到Android并连接到电脑
将adb切换到root模式

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adb root

请看备份部分

备份#

打开一个shell

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adb shell

在 /dev/block/platform 中的任意文件夹下找到找到 by-name 目录可以尝试用命令或是手动找find /dev/block -name by-name
这里教你几个常用的Linux命令
切换到某个目录 cd 目录
显示当前目录下的文件 ls
显示当前所在目录的路径 pwd
补全路径或命令按键盘上的tab按钮
这里以TicwatchPro为例，找到的路径是

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/dev/block/platform/soc/7824900.sdhci/by-name

进去ls -l可以竖着输出目录中的文件名，拼接成这样的命令(仅Linux或Mac)
adb shell cat 路径/文件名 > 文件名.img
或是(包括Windows可用，甚至不用切utf-8)
adb pull 路径/文件名
然后拿着像vscode这种按住shift+alt（shift+option）可以同时编辑多行的编辑器操作一番，就能得到这样一堆命令

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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/DDR
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/aboot
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/abootbak
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/boot
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/cache
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/cmnlib
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/cmnlibbak
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/config
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/devinfo
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/fsc
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/fsg
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/keymaster
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/keymasterbak
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/keystore
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/misc
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/modem
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/modemst1
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/modemst2
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/oem
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/pad
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/persist
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/recovery
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/rpm
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/rpmbak
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/sbl1
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/sbl1bak
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/sec
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/splash
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/ssd
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/system
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/ticnv
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/tz
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/tzbak
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/userdata
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adb pull /dev/block/platform/soc/7824900.sdhci/by-name/vendor

在需要存放备份的目录打开一个终端(Windows请使用utf8的cmd)，运行第三步拼出的命令，fastboot线刷包就备份完成了