前情回顾：https://bbs.deepin.org/zh/post/281258

后来我尝试用命令手动挂载外接硬盘还是挂不上：

root@fsl3118-PC:/home/fsl3118# mount /dev/sda2 /mnt/
mount: /mnt: unknown filesystem type 'exfat'.
dmesg(1) may have more information after failed mount system call.

我甚至用fsck检查过一遍了，问题照旧：

root@fsl3118-PC:/home/fsl3118# fsck.exfat /dev/sda2
exfatfsck 1.3.0
Checking file system on /dev/sda2.
File system version 1.0
Sector size 512 bytes
Cluster size 256 KB
Volume size 931 GB
Used space 639 GB
Available space 292 GB
Totally 15247 directories and 88909 files.
File system checking finished. No errors found.

反正就是挂载不上，很奇怪。