我定期创建正在运行的实例的映像，而无需先停止它。多年来一直没有任何问题。今晚，我创建了该实例的另一个映像（除了“ sudo yum update -y”之外，未对虚拟服务器设置进行任何更改），并注意到我的ssh会话已关闭。创建映像后，它似乎已重新启动。然后，Web控制台显示1/2状态检查通过。我重新启动了几次，状态保持不变。日志显示：
Setting hostname localhost.localdomain: [ OK ]
Setting up Logical Volume Management: [ 3.756261] random: lvm: uninitialized urandom read (4 bytes read)
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
[ OK ]
Checking filesystems
Checking all file systems.
[/sbin/fsck.ext4 (1) -- /] fsck.ext4 -a /dev/xvda1
/: clean, 437670/1048576 files, 3117833/4193787 blocks
[/sbin/fsck.xfs (1) -- /mnt/pgsql-data] fsck.xfs -a /dev/xvdf
[/sbin/fsck.ext2 (2) -- /mnt/couchbase] fsck.ext2 -a /dev/xvdg
/sbin/fsck.xfs: XFS file system.
fsck.ext2: Bad magic number in super-block while trying to open /dev/xvdg
/dev/xvdg:
The superblock could not be read or does not describe a valid ext2/ext3/ext4
[ 3.811304] random: crng init done
filesystem. If the device is valid and it really contains an ext2/ext3/ext4
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
e2fsck -b 8193 <device>
or
e2fsck -b 32768 <device>
[FAILED]
*** An error occurred during the file system check.
*** Dropping you to a shell; the system will reboot
*** when you leave the shell.
/dev/fd/9: line 2: plymouth: command not found
Give root password for maintenance
(or type Control-D to continue):
/ dev / xvdg似乎未通过磁盘检查。我从实例中分离了卷，然后重新启动。我仍然无法ssh进入。我将其重新连接并重新启动。现在它说状态检查2/2通过了，但是我仍然无法ssh再次登录，并且日志仍然显示如上所述的/ dev / xvdg问题。
任何帮助将不胜感激。谢谢！
托马斯