xfs檔案系統中繼資料損壞修複

XfS檔案系統是SGI開發的進階日志檔案系統，XFS極具伸縮性，非常健壯。

關于其安裝和使用和ext4都是一樣，就是格式化不一樣。

其次是格式化都是一樣的，它可以支援ext4單個檔案超過16T的限制。

#/sbin/mkfs.xfs –f /dev/sda6

#mount –t xfs /dev/sda6 /xfs

關于其經常會出現錯誤，進行修複

 $ cd /data3

$ ls

ls: cannot open directory .: Input/output error

修改包括三步：解除安裝，修複和檢查

[root@gpsg32 ~]# xfs_repair /dev/sdd

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.

[root@gpsg32 ~]# mount /data3

mount: 結構需要清理

[root@gpsg32 ~]# mount -f /data3

[root@gpsg32 ~]# xfs_repair -L /dev/sdd

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...

[root@gpsg32 ~]# xfs_check /dev/sdd      檢查後重新挂載OK

[root@gpsg32 ~]# df -h

檔案系統              容量  已用  可用 已用%% 挂載點

/dev/mapper/VolGroup-lv_root

                       50G  3.1G   44G   7% /

tmpfs                  79G     0   79G   0% /dev/shm

/dev/sda1             485M   63M  397M  14% /boot

/dev/mapper/VolGroup-lv_home

                       20G   15G  4.3G  78% /home

/dev/mapper/VolGroup-lv_tmp

                       50G  180M   47G   1% /tmp

/dev/sdb              2.8T  1.1T  1.7T  40% /data1

/dev/sdc              2.8T  1.1T  1.7T  40% /data2

/dev/sdd              2.8T  1.1T  1.7T  41% /data3

本文轉自zsaisai 51CTO部落格，原文連結:http://blog.51cto.com/3402313/1739830