由于疫情影响
，技术开学时间一再推迟，分享上网课就成了学生在家里面必铺开的安卓活动 。很多网课要求在手机上安装相关的刷机双清app，做题上课均在手机上，报错这时候就有个尴尬，技术手机屏幕小，分享做题上课都不方便，安卓加大手机屏幕是刷机双清不可能了，分频也不实用。报错于是技术有了一个折中的计划，用两个手机操作，分享一个细听课，安卓另一个同时做题
。刷机双清

于是报错有了下面的折腾。不少软件对安卓版本有限制
，为了安装上软件铺开操作，在抽屉里翻出了一个7年前的手机 ，想让它发光发热只能升级系统 ，网上找了一番，下载了一个Android9.0版本的系统 。

不得不会谈 ，开源是真的好，7年前的手机在开源社区还有人维护系统，最新的版本已经到了Android10。下载好对应rom 、第三方recovery。开刷。于是碰到了下面的错误
。

错误详情

在格式化 cache、data的时候报错，会谈无法挂载分区 。手动挂载所有分区发现只有 /system 分区能正常挂载，其他都是不行的。所以格式化等操作均无法铺开
。

Failed to mount /data(invalid argument)
Failed to mount /cache(invalid argument)
...
Failed to mount /data (invalid argument)Failed to mount /cache (invalid argument)...
Failed to mount /data (invalid argument)Failed to mount /cache (invalid argument)...

解决计划

上网找了下 ，发现不少人遇到了一样的情况。然后发现 fastboot 有个命令，能初始化分区，因为旧手机内没有数据需要备份，于是直接执行了 
。

fastboot -w

执行结果：

PS C:\Users\admin\Downloads> fastboot -w
mke2fs 1.44.3(10-July-2018)
Creating filesystem with 3322875 4k blocks and 832320 inodes
Filesystem UUID: 8371ac4a-7670-11ea-87a2-950aa878b190
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208
Allocating group tables: done
Writing inode tables: done
Creating journal(16384 blocks): done
Writing superblocks and filesystem accounting information: done
mke2fs 1.44.3(10-July-2018)
Creating filesystem with 98304 4k blocks and 98304 inodes
Filesystem UUID: 838a3882-7670-11ea-8cae-af4c5004139d
Superblock backups stored on blocks:
32768
Allocating group tables: done
Writing inode tables: done
Creating journal(4096 blocks): done
Writing superblocks and filesystem accounting information: done
Erasing userdata                                 OKAY [9.484s]
Sending userdata(3372 KB)                       OKAY [0.109s]
Writing userdata                                 OKAY [0.103s]
Erasing cache                                    OKAY [0.230s]
Sending cache(152 KB)                           OKAY [0.009s]
Writing cache                                    OKAY [0.021s]
Finished. Total time: 10.774s
PS C:\Users\admin\Downloads> fastboot -wmke2fs 1.44.3 (10-July-2018)Creating filesystem with 3322875 4k blocks and 832320 inodesFilesystem UUID: 8371ac4a-7670-11ea-87a2-950aa878b190Superblock backups stored on blocks:        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208Allocating group tables: doneWriting inode tables: doneCreating journal (16384 blocks): doneWriting superblocks and filesystem accounting information: donemke2fs 1.44.3 (10-July-2018)Creating filesystem with 98304 4k blocks and 98304 inodesFilesystem UUID: 838a3882-7670-11ea-8cae-af4c5004139dSuperblock backups stored on blocks:        32768Allocating group tables: doneWriting inode tables: doneCreating journal (4096 blocks): doneWriting superblocks and filesystem accounting information: doneErasing userdata                                 OKAY [  9.484s]Sending userdata (3372 KB)                       OKAY [  0.109s]Writing userdata                                 OKAY [  0.103s]Erasing cache                                    OKAY [  0.230s]Sending cache (152 KB)                           OKAY [  0.009s]Writing cache                                    OKAY [  0.021s]Finished. Total time: 10.774s
PS C:\Users\admin\Downloads> fastboot -wmke2fs 1.44.3 (10-July-2018)Creating filesystem with 3322875 4k blocks and 832320 inodesFilesystem UUID: 8371ac4a-7670-11ea-87a2-950aa878b190Superblock backups stored on blocks:        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208Allocating group tables: doneWriting inode tables: doneCreating journal (16384 blocks): doneWriting superblocks and filesystem accounting information: donemke2fs 1.44.3 (10-July-2018)Creating filesystem with 98304 4k blocks and 98304 inodesFilesystem UUID: 838a3882-7670-11ea-8cae-af4c5004139dSuperblock backups stored on blocks:        32768Allocating group tables: doneWriting inode tables: doneCreating journal (4096 blocks): doneWriting superblocks and filesystem accounting information: doneErasing userdata                                 OKAY [  9.484s]Sending userdata (3372 KB)                       OKAY [  0.109s]Writing userdata                                 OKAY [  0.103s]Erasing cache                                    OKAY [  0.230s]Sending cache (152 KB)                           OKAY [  0.009s]Writing cache                                    OKAY [  0.021s]Finished. Total time: 10.774s

执行完以上指令后就能正常挂载、格式化、更新系统了。