几台虚拟机需要重启，重启后连接不上，通过管理软件看到
Your system appears to have shut down uncleanly
press Y within 1 seconds to force file system integrity check...
checking root filesystem
/contains a file system with errors,check forced.
/:
Unattached inode 813065
/:UNEXPECTED INCONSISTENCY;RUN FSCK MANUALLY.
(i.e.,without -a or -p options)
[FAILED]
*** An error occurred during the file system check.
*** Dropping you to a shell; the system will reboot
*** when you leave the shell.
Give root password for maintenance
(or type Control-D to continue):
一开始按ctrl+d还是跳到这个页面，在就是输入root密码，能进入系统，开始使用网上的方法修复系统。
fsck -y /dev/vda1
fsck -y /dev/vda3
重启系统后发现还是原来的问题，用df -Th查看，/boot和新增的分区都没有挂在上
# df -Th
Filesystem Type Size Used Avail Use% Mounted on
/dev/vda3 ext4 42G 13G 27G 32% /
tmpfs tmpfs 1.9G 0 1.9G 0% /dev/shm
先把/重新挂载
mount -rw -o remount /
挂载boot
mount /dev/vda1 /boot
再去查看/etc/fstab以前挂载过硬盘，发现后来还添加了一块儿vdb
# cat /etc/fstab
UUID=fc9d60a8-e39b-4c20-8d24-8f7975e6f1d7 / ext4 defaults 1 1
UUID=e1de6afb-150c-407d-80ec-e2c03ebcd8dd /boot ext4 defaults 1 2
UUID=c6b62139-385b-4891-b9e2-15876655cce9 swap swap defaults 0 0
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
/dev/vdb1 /hadoopWs ext4 defaults,noatime 1 1
fdisk -l 发现并没有新增加的磁盘。
解决办法
chmod a+rw /etc/fstab
vim /etc/fstab
下面一行注释掉
#/dev/vdb1 /hadoopWs ext4 defaults,noatime 1 1
重启系统reboot
再挂载硬盘