开机进入了紧急救援模式，提示Failed to start system check on /dev/disk/by-uuid/***
提示登录后查看以下服务

systemctl status "systemd-fsck@dev-disk-by\\x2duuid-c90f924a\\x2d0d00\\x2d4a22\\x2db52c\\x2d5d87f98d54d6.service""

登录输入以上命令，输出了以下信息

error read block 37748820 （Input/Output error）....
fsck exited with status code 4
run fsck manually

查看一下fsck的错误类型

man fsck
...
              0      No errors
              1      Filesystem errors corrected
              2      System should be rebooted
              4      Filesystem errors left uncorrected
              8      Operational error
              16     Usage or syntax error
              32     Checking canceled by user request
              128    Shared-library error
...

应该是关机导致的问题，可是我明明正确关机了啊，可能是硬盘用太久了，需要退休了：)
跑一遍fsck

fsck -y /dev/sda6

然后重启

systemctl reboot

问题解决