linux操作系统未正常启动提示"Entering emergency mode. Exit the shell to continue"

是一台阿里云ecs服务器,通过vnc登录看到如下信息,进入了救援模式:
Generating “/run/initramfs/rdsosreport.txt”
“Entering emergency mode. Exit the shell to continue”
“Type ‘journalctl’ to view system log.”
You might want to save “/run/initramfs/rdsosreport.txt” to a USB stick or /boot after mounting them and attach it to a bug report.
linux操作系统未正常启动提示
journalctl提示/dev/vda1 contains a file system with errors,check forced
fsck failed with error code 4.
Failed to start FIle System Check on /dev/disk/by-uuid/xxx
Dependency failed for /sysroot.
等很多错误,无法看到操作系统启动到哪个地方进入的救援模式!

1、在:/#下执行fsck -y /dev/vda1,有fsck命令,提示/dev/vda1 is mounted
linux操作系统未正常启动提示
2、将该目录umount掉,再次重启就可以正常进入系统

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