image.png

    1. mount /dev/vdc1 /backup
    2. mount: /backup: wrong fs type, bad option, bad superblock on /dev/vdc1, missing codepage or helper program, or other error

    blkid命令查看：

    1. [root@10-0-9-52 ~]# blkid
    2. /dev/vda1: UUID="2029425f-6f3f-4000-8a9c-20f2bc9fa564" TYPE="xfs" PARTUUID="4bce6e96-01"
    3. /dev/vdb: UUID="e263119d-dc24-42d5-80fc-a831251f4268" TYPE="ext4"
    4. /dev/vdc1: UUID="2029425f-6f3f-4000-8a9c-20f2bc9fa564" TYPE="xfs" PARTUUID="4bce6e96-01"

    发现UUID一样。

    用uuidgen命令生成uuid，用xfs_admin -U 生成的uuid /dev/vdc1也报错。

    mount: /backup: wrong fs type, bad option, bad superblock on /dev/vdc1, missing codepage or helper program, or other error - 图2

    根据提示用xfs_repair -L /dev/vdc1修复成功。

    重新执行：

    1. [root@10-0-9-52 ~]# xfs_admin -U c8eebe55-b551-4e07-b82d-05aeab5f06e1 /dev/vdc1
    2. Clearing log and setting UUID
    3. writing all SBs
    4. new UUID = c8eebe55-b551-4e07-b82d-05aeab5f06e1

    再次查看发现UUID变成我们生成的了：

    1. [root@10-0-9-52 ~]# blkid
    2. /dev/vda1: UUID="2029425f-6f3f-4000-8a9c-20f2bc9fa564" TYPE="xfs" PARTUUID="4bce6e96-01"
    3. /dev/vdb: UUID="e263119d-dc24-42d5-80fc-a831251f4268" TYPE="ext4"
    4. /dev/vdc1: UUID="c8eebe55-b551-4e07-b82d-05aeab5f06e1" TYPE="xfs" PARTUUID="4bce6e96-01"

    执行挂载：

    1. [root@10-0-9-52 ~]# mount /dev/vdc1 /mount
    2. mount: /mount: mount point does not exist.
    3. [root@10-0-9-52 ~]# df -hT
    4. Filesystem     Type      Size  Used Avail Use% Mounted on
    5. devtmpfs       devtmpfs  1.9G     0  1.9G   0% /dev
    6. tmpfs          tmpfs     1.9G     0  1.9G   0% /dev/shm
    7. tmpfs          tmpfs     1.9G   33M  1.9G   2% /run
    8. tmpfs          tmpfs     1.9G     0  1.9G   0% /sys/fs/cgroup
    9. /dev/vda1      xfs        20G  2.1G   18G  11% /
    10. tmpfs          tmpfs     376M     0  376M   0% /run/user/0
    11. /dev/vdb       ext4       40G  8.0G   30G  22% /data
    12. [root@10-0-9-52 ~]# mkdir /mount
    13. [root@10-0-9-52 ~]# mount /dev/vdc1 /mount
    14. [root@10-0-9-52 ~]# df -hT
    15. Filesystem     Type      Size  Used Avail Use% Mounted on
    16. devtmpfs       devtmpfs  1.9G     0  1.9G   0% /dev
    17. tmpfs          tmpfs     1.9G     0  1.9G   0% /dev/shm
    18. tmpfs          tmpfs     1.9G   33M  1.9G   2% /run
    19. tmpfs          tmpfs     1.9G     0  1.9G   0% /sys/fs/cgroup
    20. /dev/vda1      xfs        20G  2.1G   18G  11% /
    21. tmpfs          tmpfs     376M     0  376M   0% /run/user/0
    22. /dev/vdb       ext4       40G  8.0G   30G  22% /data
    23. /dev/vdc1      xfs        40G   17G   24G  41% /mount

    需要先创好mount目录，成功mount