Based on your screenshot there looks to be a space issue.  Check the space and if not open a support ticket.

​@fjl - What version of Veeam are you using? What specific kind of backup are you performing?...physical Centos or a VM?

I saw a couple posts in the Forums who had similar errors:

https://forums.veeam.com/veeam-agents-for-linux-mac-aix-solaris-f41/centos7-agent-error-t48349.html

Have you looked in the logs? C:\ProgramData\Veeam\Backup\<job-name>.log. Maybe something more definitive will show there. You may need to open a Support case.

/dev/veeamimage01 looks like mounted filesystem or munted iso itself.

Please try to unmount if is this case and try again

好的，谢谢

helps it?

If helped, please select one comment with best answer to close topic 

我尝试卸载相应的主机，然后重新添加它;但还是无法解决
 

建议将您遇到问题前后的操作、环境的简单描述，包括VBR和Linux Repo上的日志打包整理好，向veeam售后团队开一个工单，你能得到最专业的技术支持响应；另外，这边的配图与您描述的操作好像并不对应，如果在存储库问题没有解决的状态下执行与这个存储库相关联的备份任务必然会报错的。