主机日志中出现大量文件系统的报错：
cd /dev/sdf1
ls
ls: cannot open directory .: Input/output error #显示输入/输出错误
修改包括三步：卸载，修复和检查
umount /dev/sdf1
xfs_repair /dev/sdf1
Phase 1 - find and verify superblock...
Phase 2 - using internal log
- zero log...
ERROR: The filesystem has valuable metadata changes in a log which needs to
be replayed. Mount the filesystem to replay the log, and unmount it before
re-running xfs_repair. If you are unable to mount the filesystem, then use
the -L option to destroy the log and attempt a repair.
Note that destroying the log may cause corruption -- please attempt a mount
of the filesystem before doing this.
xfs_repair -L /dev/sdf1 #可能会造成数据丢失
Phase 1 - find and verify superblock...
Phase 2 - using internal log
- zero log...
ALERT: The filesystem has valuable metadata changes in a log which is being
destroyed because the -L option was used.
- scan filesystem freespace and inode maps...
sb_icount 128, counted 4922112
sb_ifree 123, counted 25707
sb_fdblocks 731556628, counted 438595794
- found root inode chunk
Phase 3 - for each AG...
xfs_check /dev/sdf1 #检查没问题即可进行挂载
mount /dev/sdf1 #手动mount