服务器重启后出现问题如下：
1.再次重启服务器按住Esc 查看启动进度
2.问题出现time超时，无法挂载home.device设备
a start job is running for dev-mapper-centosx2dhome.device
Job dev-mapper-centosx2dhome.device/start failed with result 'timoue'
job selinux-policy-migrate-local-changes@targeted.service/start failed with result 'dependency'
3.或者进入系统查看/var/log/boot.log启动日志
4.检查启动时磁盘挂载文件/etc/fstab,多出的home.device设备注释掉即可。