Linux文件系统的修复之LVM xfs

Posted 2020-11-15 志鸿鸣

今日由于电脑非正常关机，导致虚拟机文件系统报诸如：

generating “/run/initramfs/rdsosreport.txt”
entering emergencymode.
exit the shell to continue
type “journalctl” to view system logs.
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。这样的错误。

经过百度解决了问题，认为解决方案很nice！！！故作此笔记，进行总结与分享。

修复步骤：

《1》  ls -l /dev/mapper

《2》  mkdir /mnt

《3》  mount /dev/mapper/cl_muban-root /mnt   # 这里也可以操作 提示中的 dm-0 (即 /dev/dm-0，其实/dev/mapper/cl_muban-root是链接到 /dev/dm-0  )

或者  mount  /dev/dm-0  /mnt 

《4》  umount /mnt

《5》  xfs_repair  /dev/mapper/cl_muban-root   或   xfs_repair  /dev/dm-0

《6》  init 6   (会直接reboot重启系统)

 

 修复命令xfs_repair：

xfs_repair -h
xfs_repair: invalid option -- ‘h‘
Usage: xfs_repair [options] device

Options:
-f The device is a file
-L Force log zeroing. Do this as a last resort.
-l logdev Specifies the device where the external log resides.
-m maxmem Maximum amount of memory to be used in megabytes.
-n No modify mode, just checks the filesystem for damage.
-P Disables prefetching.
-r rtdev Specifies the device where the realtime section resides.
-v Verbose output.
-c subopts Change filesystem parameters - use xfs_admin.
-o subopts Override default behaviour, refer to man page.
-t interval Reporting interval in minutes.
-d Repair dangerously.
-V Reports version and exits.
本次问题虽解决，然而知其然，却不知其所以然，后期应该重新回归。