[Linux] 磁盘挂载出错导致开机进入emergency mode

RHEL7 开机后进入emergency mode，打屏如下：

welcome to emergency mode! after logging in,type "journalctl -xb" to view system logs,"systemctl reboot" to reboot,"systemctl default" to try again to boot into default mode.
give root password for maintenance

根据提示，输入root密码后，执行命令"journalctl -xb"查看日志，发现/root/somefolder（说明：这是一个挂载点）找不到

查看 /etc/fstab 发现已移除的路径没有正常卸载，尝试把最后一行注释后重启。

[root@xxx ~]# cat /etc/fstab
(省略)
/dev/mapper/rhel-home   /home                   xfs     defaults        0 0
/dev/mapper/rhel-swap   swap                    swap    defaults        0 0
/root/iso/somefile.iso /root/somefolder iso9660 defaults        0 0
[root@xxx ~]#

重启后恢复正常。